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Toshio Matsumoto - One of the best experts on this subject based on the ideXlab platform.
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Zodiacal Light Beyond Earth Orbit Observed with Pioneer 10
The Astronomical Journal, 2018Co-Authors: Toshio Matsumoto, Kohji Tsumura, Yoshiki Matsuoka, Jeonghyun PyoAbstract:We reanalyze the Imaging Photopolarimeter data from Pioneer 10 to study the Zodiacal Light in the B and R bands beyond Earth orbit, applying an improved method to subtract integrated star Light (ISL) and diffuse Galactic Light (DGL). We found that there exists a significant instrumental offset, making it difficult to examine the absolute sky brightness. Instead, we analyzed the differential brightness, i.e., the difference in sky brightness from the average at high ecliptic latitude, and compared with that expected from the model Zodiacal Light. At a heliocentric distance of r 3 au, as previously reported. However, a clear discrepancy from the model is found at r=2.94 au which indicates the existence of a local dust cloud produced by the collision of asteroids or dust trail from active asteroids (or main-belt comets). Our result confirms that the main component of the Zodiacal Light (smooth cloud) is consistent with the model even beyond the earth orbit, which justifies the detection of the extragalactic background Light after subtracting the Zodiacal Light based on the model.
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Observations of the Near-Infrared Spectrum of the Zodiacal Light with CIBER
The Astrophysical Journal, 2010Co-Authors: Kohji Tsumura, J. Battle, Jamie Bock, Asantha Cooray, Viktor Hristov, Brian Keating, D. H. Lee, Louis Levenson, Peter Mason, Toshio MatsumotoAbstract:Interplanetary dust (IPD) scatters solar radiation which results in the Zodiacal Light that dominates the celestial diffuse brightness at optical and near-infrared wavelengths. Both asteroid collisions and cometary ejections produce the IPD, but the relative contribution from these two sources is still unknown. The Low Resolution Spectrometer (LRS) onboard the Cosmic Infrared Background Experiment (CIBER) observed the astrophysical sky spectrum between 750 and 2100 nm over a wide range of ecliptic latitude. The resulting Zodiacal Light spectrum is redder than the solar spectrum, and shows a broad absorption feature, previously unreported, at approximately 900 nm, suggesting the existence of silicates in the IPD material. The spectral shape of the Zodiacal Light is isotropic at all ecliptic latitudes within the measurement error. The Zodiacal Light spectrum, including the extended wavelength range to 2500 nm using IRTS data, is qualitatively similar to the reflectance of S-type asteroids. This result can be explained by the proximity of S-type asteroidal dust to Earth's orbit, and the relativily high albedo of asteridal dust compared with cometary dust.
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IRTS Observation of the Near-Infrared Spectrum of the Zodiacal Light
Publications of the Astronomical Society of Japan, 1996Co-Authors: Toshio Matsumoto, Mitsunobu Kawada, Hiroshi Murakami, Manabu Noda, Shuji Matsuura, Masahiro Tanaka, Katsuyuki NaritaAbstract:We present the near-infrared observation of the Zodiacal Light with the IRTS (Infrared Telescope in Space), a small cryogenically cooled orbital infrared telescope. The observed spectra of the sky brightness at wavelengths from 1.4 /?m to 4.0 fim are characterized by a smooth stellar-like spectrum at wavelengths shorter than 3.2 /L?m, and enhanced emission at the long wavelengths, which is attributed to thermal emission from interplanetary dust (IPD). The measured sky brightness has a clear dependence on the ecliptic latitude, implying that the Zodiacal Light is a dominant emission component of the near-infrared sky. The spectrum of the Zodiacal Light, itself, was obtained by subtracting other emission components. Although it is fairly close to the solar spectrum at wavelengths between 1.8 and 3.2 /?m, it clearly shows a decrement in the scattering efficiency at the short-wavelength end. The Zodiacal Light at 1.4-3.2 ?xm is about twice as bright as that extrapolated from optical measurements. These results indicate that large dust is responsible for the near-infrared Zodiacal Light; they also suggest that the IPD that has a spectral reflectance similar to the S-type asteroids could be responsible for the near-infrared Zodiacal Light.
Kohji Tsumura - One of the best experts on this subject based on the ideXlab platform.
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Zodiacal Light Beyond Earth Orbit Observed with Pioneer 10
The Astronomical Journal, 2018Co-Authors: Toshio Matsumoto, Kohji Tsumura, Yoshiki Matsuoka, Jeonghyun PyoAbstract:We reanalyze the Imaging Photopolarimeter data from Pioneer 10 to study the Zodiacal Light in the B and R bands beyond Earth orbit, applying an improved method to subtract integrated star Light (ISL) and diffuse Galactic Light (DGL). We found that there exists a significant instrumental offset, making it difficult to examine the absolute sky brightness. Instead, we analyzed the differential brightness, i.e., the difference in sky brightness from the average at high ecliptic latitude, and compared with that expected from the model Zodiacal Light. At a heliocentric distance of r 3 au, as previously reported. However, a clear discrepancy from the model is found at r=2.94 au which indicates the existence of a local dust cloud produced by the collision of asteroids or dust trail from active asteroids (or main-belt comets). Our result confirms that the main component of the Zodiacal Light (smooth cloud) is consistent with the model even beyond the earth orbit, which justifies the detection of the extragalactic background Light after subtracting the Zodiacal Light based on the model.
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observations of the near infrared spectrum of the Zodiacal Light with ciber
The Astrophysical Journal, 2010Co-Authors: Kohji Tsumura, J. Battle, Asantha Cooray, Brian Keating, D. H. Lee, Louis Levenson, J J Bock, V V Hristov, Peter MasonAbstract:Interplanetary dust (IPD) scatters solar radiation which results in the Zodiacal Light that dominates the celestial diffuse brightness at optical and near-infrared wavelengths. Both asteroid collisions and cometary ejections produce the IPD, but the relative contribution from these two sources is still unknown. The low resolution spectrometer (LRS) onboard the Cosmic Infrared Background ExpeRiment (CIBER) observed the astrophysical sky spectrum between 0.75 and 2.1 μm over a wide range of ecliptic latitude. The resulting Zodiacal Light spectrum is redder than the solar spectrum, and shows a broad absorption feature, previously unreported, at approximately 0.9 μm, suggesting the existence of silicates in the IPD material. The spectral shape of the Zodiacal Light is isotropic at all ecliptic latitudes within the measurement error. The Zodiacal Light spectrum, including the extended wavelength range to 2.5 μm using Infrared Telescope in Space (IRTS) data, is qualitatively similar to the reflectance of S-type asteroids. This result can be explained by the proximity of S-type asteroidal dust to Earth's orbit, and the relatively high albedo of asteroidal dust compared with cometary dust.
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Observations of the Near-Infrared Spectrum of the Zodiacal Light with CIBER
The Astrophysical Journal, 2010Co-Authors: Kohji Tsumura, J. Battle, Jamie Bock, Asantha Cooray, Viktor Hristov, Brian Keating, D. H. Lee, Louis Levenson, Peter Mason, Toshio MatsumotoAbstract:Interplanetary dust (IPD) scatters solar radiation which results in the Zodiacal Light that dominates the celestial diffuse brightness at optical and near-infrared wavelengths. Both asteroid collisions and cometary ejections produce the IPD, but the relative contribution from these two sources is still unknown. The Low Resolution Spectrometer (LRS) onboard the Cosmic Infrared Background Experiment (CIBER) observed the astrophysical sky spectrum between 750 and 2100 nm over a wide range of ecliptic latitude. The resulting Zodiacal Light spectrum is redder than the solar spectrum, and shows a broad absorption feature, previously unreported, at approximately 900 nm, suggesting the existence of silicates in the IPD material. The spectral shape of the Zodiacal Light is isotropic at all ecliptic latitudes within the measurement error. The Zodiacal Light spectrum, including the extended wavelength range to 2500 nm using IRTS data, is qualitatively similar to the reflectance of S-type asteroids. This result can be explained by the proximity of S-type asteroidal dust to Earth's orbit, and the relativily high albedo of asteridal dust compared with cometary dust.
Peter Mason - One of the best experts on this subject based on the ideXlab platform.
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observations of the near infrared spectrum of the Zodiacal Light with ciber
The Astrophysical Journal, 2010Co-Authors: Kohji Tsumura, J. Battle, Asantha Cooray, Brian Keating, D. H. Lee, Louis Levenson, J J Bock, V V Hristov, Peter MasonAbstract:Interplanetary dust (IPD) scatters solar radiation which results in the Zodiacal Light that dominates the celestial diffuse brightness at optical and near-infrared wavelengths. Both asteroid collisions and cometary ejections produce the IPD, but the relative contribution from these two sources is still unknown. The low resolution spectrometer (LRS) onboard the Cosmic Infrared Background ExpeRiment (CIBER) observed the astrophysical sky spectrum between 0.75 and 2.1 μm over a wide range of ecliptic latitude. The resulting Zodiacal Light spectrum is redder than the solar spectrum, and shows a broad absorption feature, previously unreported, at approximately 0.9 μm, suggesting the existence of silicates in the IPD material. The spectral shape of the Zodiacal Light is isotropic at all ecliptic latitudes within the measurement error. The Zodiacal Light spectrum, including the extended wavelength range to 2.5 μm using Infrared Telescope in Space (IRTS) data, is qualitatively similar to the reflectance of S-type asteroids. This result can be explained by the proximity of S-type asteroidal dust to Earth's orbit, and the relatively high albedo of asteroidal dust compared with cometary dust.
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Observations of the Near-Infrared Spectrum of the Zodiacal Light with CIBER
The Astrophysical Journal, 2010Co-Authors: Kohji Tsumura, J. Battle, Jamie Bock, Asantha Cooray, Viktor Hristov, Brian Keating, D. H. Lee, Louis Levenson, Peter Mason, Toshio MatsumotoAbstract:Interplanetary dust (IPD) scatters solar radiation which results in the Zodiacal Light that dominates the celestial diffuse brightness at optical and near-infrared wavelengths. Both asteroid collisions and cometary ejections produce the IPD, but the relative contribution from these two sources is still unknown. The Low Resolution Spectrometer (LRS) onboard the Cosmic Infrared Background Experiment (CIBER) observed the astrophysical sky spectrum between 750 and 2100 nm over a wide range of ecliptic latitude. The resulting Zodiacal Light spectrum is redder than the solar spectrum, and shows a broad absorption feature, previously unreported, at approximately 900 nm, suggesting the existence of silicates in the IPD material. The spectral shape of the Zodiacal Light is isotropic at all ecliptic latitudes within the measurement error. The Zodiacal Light spectrum, including the extended wavelength range to 2500 nm using IRTS data, is qualitatively similar to the reflectance of S-type asteroids. This result can be explained by the proximity of S-type asteroidal dust to Earth's orbit, and the relativily high albedo of asteridal dust compared with cometary dust.
John C Mather - One of the best experts on this subject based on the ideXlab platform.
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Cosmic Infrared Background Fluctuations and Zodiacal Light
The Astrophysical Journal, 2016Co-Authors: Richard G Arendt, A Kashlinsky, S H Moseley, John C MatherAbstract:We performed a specific observational test to measure the effect that the Zodiacal Light can have on measurements of the spatial fluctuations of the near-IR (near-infrared)background. Previous estimates of possible fluctuations caused by Zodiacal Light have often been extrapolated from observations of the thermal emission at longer wavelengths and low angular resolution or from IRAC (Infrared Array Camera) observations of high-latitude fields where Zodiacal Light is faint and not strongly varying with time. The new observations analyzed here target the COSMOS (Cosmic Evolution Survey) field at low ecliptic latitude where the Zodiacal Light intensity varies by factors of approximately 2 over the range of solar elongations at which the field can be observed. We find that the white-noise component of the spatial power spectrum of the background is correlated with the modeled Zodiacal Light intensity. Roughly half of the measured white noise is correlated with the Zodiacal Light, but a more detailed interpretation of the white noise is hampered by systematic uncertainties that are evident in the Zodiacal Light model. At large angular scales (greater than or approximately equal to 100 arcseconds) where excess power above the white noise is observed, we find no correlation of the power with the modeled intensity of the Zodiacal Light. This test clearly indicates that the large-scale power in the infrared background is not being caused by the Zodiacal Light.
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cosmic infrared background fluctuations and Zodiacal Light
arXiv: Cosmology and Nongalactic Astrophysics, 2016Co-Authors: Richard G Arendt, A Kashlinsky, S H Moseley, John C MatherAbstract:We have performed a specific observational test to measure the effect that the Zodiacal Light can have on measurements of the spatial fluctuations of the near-IR background. Previous estimates of possible fluctuations caused by Zodiacal Light have often been extrapolated from observations of the thermal emission at longer wavelengths and low angular resolution, or from IRAC observations of high latitude fields where Zodiacal Light is faint and not strongly varying with time. The new observations analyzed here target the COSMOS field, at low ecliptic latitude where the Zodiacal Light intensity varies by factors of $\sim2$ over the range of solar elongations at which the field can be observed. We find that the white noise component of the spatial power spectrum of the background is correlated with the modeled Zodiacal Light intensity. Roughly half of the measured white noise is correlated with the Zodiacal Light, but a more detailed interpretation of the white noise is hampered by systematic uncertainties that are evident in the Zodiacal Light model. At large angular scales ($\gtrsim100"$) where excess power above the white noise is observed, we find no correlation of the power with the modeled intensity of the Zodiacal Light. This test clearly indicates that the large scale power in the infrared background is not being caused by the Zodiacal Light.
Richard G Arendt - One of the best experts on this subject based on the ideXlab platform.
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Cosmic Infrared Background Fluctuations and Zodiacal Light
The Astrophysical Journal, 2016Co-Authors: Richard G Arendt, A Kashlinsky, S H Moseley, John C MatherAbstract:We performed a specific observational test to measure the effect that the Zodiacal Light can have on measurements of the spatial fluctuations of the near-IR (near-infrared)background. Previous estimates of possible fluctuations caused by Zodiacal Light have often been extrapolated from observations of the thermal emission at longer wavelengths and low angular resolution or from IRAC (Infrared Array Camera) observations of high-latitude fields where Zodiacal Light is faint and not strongly varying with time. The new observations analyzed here target the COSMOS (Cosmic Evolution Survey) field at low ecliptic latitude where the Zodiacal Light intensity varies by factors of approximately 2 over the range of solar elongations at which the field can be observed. We find that the white-noise component of the spatial power spectrum of the background is correlated with the modeled Zodiacal Light intensity. Roughly half of the measured white noise is correlated with the Zodiacal Light, but a more detailed interpretation of the white noise is hampered by systematic uncertainties that are evident in the Zodiacal Light model. At large angular scales (greater than or approximately equal to 100 arcseconds) where excess power above the white noise is observed, we find no correlation of the power with the modeled intensity of the Zodiacal Light. This test clearly indicates that the large-scale power in the infrared background is not being caused by the Zodiacal Light.
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cosmic infrared background fluctuations and Zodiacal Light
arXiv: Cosmology and Nongalactic Astrophysics, 2016Co-Authors: Richard G Arendt, A Kashlinsky, S H Moseley, John C MatherAbstract:We have performed a specific observational test to measure the effect that the Zodiacal Light can have on measurements of the spatial fluctuations of the near-IR background. Previous estimates of possible fluctuations caused by Zodiacal Light have often been extrapolated from observations of the thermal emission at longer wavelengths and low angular resolution, or from IRAC observations of high latitude fields where Zodiacal Light is faint and not strongly varying with time. The new observations analyzed here target the COSMOS field, at low ecliptic latitude where the Zodiacal Light intensity varies by factors of $\sim2$ over the range of solar elongations at which the field can be observed. We find that the white noise component of the spatial power spectrum of the background is correlated with the modeled Zodiacal Light intensity. Roughly half of the measured white noise is correlated with the Zodiacal Light, but a more detailed interpretation of the white noise is hampered by systematic uncertainties that are evident in the Zodiacal Light model. At large angular scales ($\gtrsim100"$) where excess power above the white noise is observed, we find no correlation of the power with the modeled intensity of the Zodiacal Light. This test clearly indicates that the large scale power in the infrared background is not being caused by the Zodiacal Light.
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high resolution near infrared spectrometer to study the Zodiacal Light spectrum
American Astronomical Society Meeting Abstracts, 2008Co-Authors: A. Kutyrev, Richard G Arendt, S H Moseley, E. Dwek, Robert F. Silverberg, D. RapchunAbstract:We are developing a near infrared spectrometer for measuring solar absorption lines in the Zodiacal Light in the near infrared region. R. Reynolds at el. (2004, ApJ 612, 1206) demonstrated that observing single Fraunhofer line can be a powerful tool for extracting Zodiacal Light parameters based on their measurements of the profile of the Mg I line at 5184 A. We are extending this technique to the near infrared with the primary goal of measuring the absolute intensity of the Zodiacal Light. This measurement will provide the crucial information needed to accurately subtract Zodiacal emission from the DIRBE measurements to get a much higher quality measurement of the extragalactic IR background. The instrument design is based on a dual Fabry-Perot interferometer with a narrow band filter. Its double etalon design allows to achieve high spectral contrast to reject the bright out of band telluric OH emission. High spectral contrast is absolutely necessary to achieve detection limits needed to accurately measure the intensity of the absorption line. We present the design, estimated performance of the instrument with the expected results of the observing program.