Noncosmological signal contributions to the COBE DMR anisotropy maps

Bennett, C. L.; Hinshaw, G.; Banday, A. J.; Kogut, A.; Wright, E. L.; Loewenstein, K.; Cheng, E. S.

doi:10.1086/187000

Cited by 32 publications

(44 citation statements)

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“…This is a well-known technique (Bennett et al 1993;Hernández-Monteagudo & Rubiño-Martín 2004;Planck Collaboration et al 2011), consisting of integrating temperatures of all pixels within a given aperture and subtracting a background level which is calculated by averaging pixel temperatures enclosed by an external annulus. The flux is then given by…”

Section: Wmap Intensitymentioning

confidence: 99%

DETECTION OF ANOMALOUS MICROWAVE EMISSION IN THE PLEIADES REFLECTION NEBULA WITHWILKINSON MICROWAVE ANISOTROPY PROBEAND THE COSMOSOMAS EXPERIMENT

Génova-Santos

Rebolo

Rubiño-Martín

et al. 2011

ApJ

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We present evidence for anomalous microwave emission (AME) in the Pleiades reflection nebula, using data from the seven-year release of the Wilkinson Microwave Anisotropy Probe and from the COSMOSOMAS (Cosmological Structures on Medium Angular Scales) experiment. The flux integrated in a 1• radius around R.A. = 56.• 24, decl. = 23.• 78 (J2000) is 2.15 ± 0.12 Jy at 22.8 GHz, where AME is dominant. COSMOSOMAS data show no significant emission, but allow one to set upper limits of 0.94 and 1.58 Jy (99.7% confidence level), respectively, at 10.9 and 14.7 GHz, which are crucial to pin down the AME spectrum at these frequencies, and to discard any other emission mechanisms which could have an important contribution to the signal detected at 22.8 GHz. We estimate the expected level of free-free emission from an extinction-corrected Hα template, while the thermal dust emission is characterized from infrared DIRBE data and extrapolated to microwave frequencies. When we deduct the contribution from these two components at 22.8 GHz, the residual flux, associated with AME, is 2.12 ± 0.12 Jy (17.7σ ). The spectral energy distribution from 10 to 60 GHz can be accurately fitted with a model of electric dipole emission from small spinning dust grains distributed in two separated phases of molecular and atomic gas, respectively. The dust emissivity, calculated by correlating the 22.8 GHz data with 100 μm data, is found to be 4.36 ± 0.17 μK (MJy sr −1 ) −1 , a value considerably lower than in typical AME clouds, which present emissivities of ∼20 μK (MJy sr −1 ) −1 , although higher than the 0.2 μK (MJy sr −1 ) −1 of the translucent cloud LDN 1780, where AME has recently been claimed. The physical properties of the Pleiades nebula, in particular its low extinction A V ∼ 0.4, indicate that this is indeed a much less opaque object than those where AME has usually been studied. This fact, together with the broad knowledge of the stellar content of this region, provides an excellent testbed for AME characterization in physical conditions different from those generally explored up to now.

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Section: Wmap Intensitymentioning

confidence: 99%

DETECTION OF ANOMALOUS MICROWAVE EMISSION IN THE PLEIADES REFLECTION NEBULA WITHWILKINSON MICROWAVE ANISOTROPY PROBEAND THE COSMOSOMAS EXPERIMENT

Génova-Santos

Rebolo

Rubiño-Martín

et al. 2011

ApJ

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“…"·ÑÎÑAEÐÑÇ" ÒâÕÐÑ, ÑÃÐÂ-ÓÖÉÇÐÐÑÇ "²ÇÎËÍÕÑÏ-1", AEÂÐÐÞÇ COBE ÐÇ ÒÑAEÕÄÇÓAEËÎË [4,5].¯Ñ Ä ËÐÕÇÓÇÔÖáÜÇÌ ÐÂÔ ÑÃÎÂÔÕË ÑÕÐÑÛÇÐËÇ ÔËÅ-ÐÂÎ/ÛÖÏ ÐÂ ÓÂAEËÑÍÂÓÕÇ COBE ÃÞÎÑ ÐÇAEÑÔÕÂÕÑÚÐÑ ÃÑÎßÛËÏ.…”

Section: £äçAeçðëçunclassified

“…³ÎÇAEÖÇÕ ÑÕÏÇÕËÕß, ÚÕÑ ÚÂÔÕß "ØÑÎÑAEÐÑÌ" ÑÃÎÂÔÕË "²ÇÎËÍÕÂ-1" ÄÃÎËÊË ÐÖÎÇÄÞØ àÍÎËÒÕËÚÇÔÍËØ AEÑÎÅÑÕ ËÏÇÇÕ ÐÂ ÍÂÓÕÇ WMAP âÓÍÑÔÕÐÖá ÕÇÏÒÇÓÂÕÖÓÖ, ÃÎËÊ-ÍÖá Í ÐÖÎá. ®ÑÉÐÑ ÒÓÇAEÒÑÎÑÉËÕß, ÚÕÑ ËÏÇÐÐÑ àÕÑ ÏÇÔÕÑ ËÔÔÎÇAEÑÄÂÎË ÂÄÕÑÓÞ ÓÂÃÑÕ [4,5], ÍÑÅAEÂ ÒÓËÛÎË Í ÄÞÄÑAEÖ Ñ ÐÇÔÑÑÕÄÇÕÔÕÄËË AEÂÐÐÞØ "²ÇÎËÍÕÂ-1" Ë ³°£¦. £ÒÓÑÚÇÏ, Ä ÔÒËÔÍÇ ÐÂËÃÑÎÇÇ "ØÑÎÑAEÐÞØ" ÒâÕÇÐ ÐÂ ÍÂÓÕÇ COBE [8] ÐÇÕ Ë "The Spot" ì ÔÂÏÑÅÑ "ØÑÎÑAEÐÑÅÑ" ÑÃÝÇÍÕÂ, ÑÃÐÂÓÖÉÇÐÐÑÅÑ ÒÑÊAEÐÇÇ Ä ÐÂÃÎáAEÇÐËâØ WMAP.…”

Section: £äçAeçðëçunclassified

Cosmic microwave background anisotropy data correlation in WMAP and Relikt-1 experiments

Skulachev¹

2010

Usp. Fiz. Nauk

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“…BOOMERANG had a northern hemisphere #ight in August 1998 followed by a 10-day #ight circumnavigating Antarctica in the austral summer beginning December 29, 1998 and lasting until January 8,1999. BOOMERANG has mapped a signi"cant region of the sky.…”

Section: Boomerangmentioning

confidence: 99%

CMB anisotropy experiments

Smoot

2000

Physics Reports

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Anisotropies in the cosmic microwave background (CMB) encode information about the evolution and development of the universe. Quality observations of CMB anisotropies can provide a very strong test of cosmological models and provide high precision determination of major cosmological parameters. This paper provides a review of the COBE DMR results, the current status of the measurements of the CMB anisotropy power spectrum and then focuses current and future programs including both suborbital observations and the two selected satellite missions: the NASA MidEX mission MAP and the ESA M3 mission Max Planck Surveyor. This review includes both a description of the experimental programs and the expected quality level of results.

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Noncosmological signal contributions to the COBE DMR anisotropy maps

Cited by 32 publications

References 0 publications

DETECTION OF ANOMALOUS MICROWAVE EMISSION IN THE PLEIADES REFLECTION NEBULA WITHWILKINSON MICROWAVE ANISOTROPY PROBEAND THE COSMOSOMAS EXPERIMENT

DETECTION OF ANOMALOUS MICROWAVE EMISSION IN THE PLEIADES REFLECTION NEBULA WITHWILKINSON MICROWAVE ANISOTROPY PROBEAND THE COSMOSOMAS EXPERIMENT

Cosmic microwave background anisotropy data correlation in WMAP and Relikt-1 experiments

CMB anisotropy experiments

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