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Properties of Galactic cirrus clouds observed by BOOMERanG
Author(s)
Language
English
Obiettivo Specifico
1.10. TTC - Telerilevamento
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/713 (2010)
Pages (printed)
959-969
Issued date
2010
Alternative Location
Abstract
The physical properties of galactic cirrus emission are not well characterized. BOOMERANG is a balloonborne
experiment designed to study the cosmic microwave background at high angular resolution in the millimeter
range. The BOOMERANG 245 and 345 GHz channels are sensitive to interstellar signals, in a spectral
range intermediate between FIR and microwave frequencies. We look for physical characteristics of cirrus
structures in a region at high galactic latitudes (b -40 ) where BOOMERANG performed its deepest integration,
combining the BOOMERANG data with other available datasets at different wavelengths. We have
detected 8 emission patches in the 345 GHz map, consistent with cirrus dust in the Infrared Astronomical Satellite
maps. The analysis technique we have developed allows to identify the location and the shape of cirrus
clouds, and to extract the flux from observationswith different instruments at differentwavelengths and angular
resolutions. We study the integrated flux emitted from these cirrus clouds using data from Infrared Astronomical
Satellite (IRAS), DIRBE, BOOMERANG and Wilkinson Microwave Anisotropy Probe in the frequency
range 23–3000 GHz (13 mm 100 μm wavelength). We fit the measured spectral energy distributions with a
combination of a grey body and a power-law spectra considering two models for the thermal emission. The
temperature of the thermal dust component varies in the 7 – 20 K range and its emissivity spectral index is in
the 1 – 5 range. We identified a physical relation between temperature and spectral index as had been proposed
in previous works. This technique can be proficiently used for the forthcoming Planck and Herschel missions
data.
experiment designed to study the cosmic microwave background at high angular resolution in the millimeter
range. The BOOMERANG 245 and 345 GHz channels are sensitive to interstellar signals, in a spectral
range intermediate between FIR and microwave frequencies. We look for physical characteristics of cirrus
structures in a region at high galactic latitudes (b -40 ) where BOOMERANG performed its deepest integration,
combining the BOOMERANG data with other available datasets at different wavelengths. We have
detected 8 emission patches in the 345 GHz map, consistent with cirrus dust in the Infrared Astronomical Satellite
maps. The analysis technique we have developed allows to identify the location and the shape of cirrus
clouds, and to extract the flux from observationswith different instruments at differentwavelengths and angular
resolutions. We study the integrated flux emitted from these cirrus clouds using data from Infrared Astronomical
Satellite (IRAS), DIRBE, BOOMERANG and Wilkinson Microwave Anisotropy Probe in the frequency
range 23–3000 GHz (13 mm 100 μm wavelength). We fit the measured spectral energy distributions with a
combination of a grey body and a power-law spectra considering two models for the thermal emission. The
temperature of the thermal dust component varies in the 7 – 20 K range and its emissivity spectral index is in
the 1 – 5 range. We identified a physical relation between temperature and spectral index as had been proposed
in previous works. This technique can be proficiently used for the forthcoming Planck and Herschel missions
data.
Sponsors
Faculty of the European Space Astronomy Center (ESAC-ESA). Italian Space Agency, contracts COFIS, BOOMERANG and HiGal
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Arnal, E. M., Bajaja, E., Larrarte, J. J., Morras, R., & Pöppel, W. G. L. 2000,
A&AS, 142, 35
Bajaja, E., Arnal, E. M., Larrarte, J. J., Morras, R., Pöppel, W. G. L., &
Kalberla, P. M. W. 2005, A&A, 440, 767
Boggess, N. W., et al. 1992, ApJ, 397, 420
Bot, C., Helou, G., Boulanger, F., Lagache, G., Miville-Deschenes, M.-A.,
Draine, B., & Martin, P. 2009, ApJ, 695, 469
Boulanger, F., Abergel, A., Bernard, J., Burton, W. B., Desert, F., Hartmann,
D., Lagache, G., & Puget, J. 1996, A&A, 312, 256
Christensen, N., Meyer, R., Knox, L., & Luey, B. 2001, Classical and
Quantum Gravity, 18, 2677
Crill, B. P., et al. 2003, ApJS, 148, 527
de Gasperis, G., Balbi, A., Cabella, P., Natoli, P., & Vittorio, N. 2005, A&A,
436, 1159
de Oliveira-Costa, A., Tegmark, M., Gaensler, B. M., Jonas, J., Landecker,
T. L., & Reich, P. 2008, MNRAS, 388, 247
De Troia, G., et al. 2007, ApJ, 670, L73
Désert, F.-X., et al. 2008, A&A, 481, 411
Draine, B. T., & Lazarian, A. 1998, ApJ, 508, 157
Dupac, X., et al. 2003, A&A, 404, L11
Finkbeiner, D. P. 2003, ApJS, 146, 407
Finkbeiner, D. P., Davis, M., & Schlegel, D. J. 1999, ApJ, 524, 867
Gold, B., et al. 2009, ApJS, 180, 265
Górski, K. M., Hivon, E., Banday, A. J.,Wandelt, B. D., Hansen, F. K.,
Reinecke, M., & Bartelmann, M. 2005, ApJ, 622, 759
Haslam, C. G. T., Salter, C. J., Stoffel, H., & Wilson, W. E. 1982, A&AS,
47, 1Hinshaw, G., et al. 2007, ApJS, 170, 288
Jones, W. C., et al. 2006, ApJ, 647, 823
Kalberla, P. M. W., Burton, W. B., Hartmann, D., Arnal, E. M., Bajaja, E.,
Morras, R., & Pöppel, W. G. L. 2005, A&A, 440, 775
Kiss, C., Ábrahám, P., Laureijs, R. J., Moór, A., & Birkmann, S. M. 2006,
MNRAS, 373, 1213
Lagache, G., Abergel, A., Boulanger, F., & Puget, J.-L. 1998, A&A, 333,
709
Leach, S. M., et al. 2008, A&A, 491, 597
Lewis, A., & Bridle, S. 2002, Phys. Rev. D, 66, 103511
Low, F. J., Neugebauer, G., Gautier, III, T. N., & Gillett, F. 1984, in BAAS,
Vol. 16, , 968
MacTavish, C. J., et al. 2006, ApJ, 647, 799
Masi, S., et al. 2001, ApJ, 553, L93
—. 2006, A&A, 458, 687
Mather, J. C., et al. 1994, ApJ, 420, 439
Meny, C., Gromov, V., Boudet, N., Bernard, J.-P., Paradis, D., & Nayral, C.
2007, A&A, 468, 171
Miville-Deschênes, M.-A., & Lagache, G. 2005, ApJS, 157, 302
Montroy, T. E., et al. 2006, ApJ, 647, 813
Natoli, P., et al. 2009, ArXiv 0905.4301
Netterfield, C. B., et al. 2009, ApJ, 707, 1824
Neugebauer, G., et al. 1984, ApJ, 278, L1
Pascale, E., et al. 2008, ApJ, 681, 400
Piacentini, F., et al. 2006, ApJ, 647, 833
Veneziani, M., et al. 2009, ApJ, 702, L61
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PROPERTIES OF GALACTIC CIRRUS CLOUDS OBSERVED BY BOOMERANG.pdf
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