The Atacama Cosmology Telescope: arcminute-resolution maps of 18 000 square degrees of the microwave sky from ACT 2008–2018 data combined with Planck

Autor: Emmanuel Schaan, Johannes Hubmayr, Mark Halpern, Mark J. Devlin, Patricio A. Gallardo, Thibaut Louis, Rolando Dünner, Erminia Calabrese, Bruce Partridge, Rahul Datta, Lyman A. Page, Leila R. Vale, Jamie Stevens, Nick Battaglia, Jason E. Austermann, Kavilan Moodley, Joel N. Ullom, John P. Nibarger, Zhilei Xu, Shannon M. Duff, Edward V. Denison, Renée Hložek, Adriaan J. Duivenvoorden, Jo Dunkley, Michael D. Niemack, John P. Hughes, Daniel T. Becker, Emilie Storer, Benjamin L. Schmitt, Nicholas F. Cothard, Dongwon Han, Blake D. Sherwin, Steve K. Choi, Cristóbal Sifón, Omar Darwish, Maria Salatino, J. Colin Hill, Sigurd Naess, Jeff McMahon, Richard J. Bond, Adam D. Hincks, Federico Nati, Matt Hilton, Jeff Van Lanen, Arthur Kosowsky, Alexander van Engelen, Suzanne T. Staggs, Gene C. Hilton, Cody J. Duell, Eve M. Vavagiakis, David N. Spergel, James A. Beall, Kevin T. Crowley, Alessandro Schillaci, Shuay-Pwu Patty Ho, Kevin M. Huffenberger, Anna E. Fox, Simone Aiola, Matthew Hasselfield, Edward J. Wollack, Mathew S. Madhavacheril, Neelima Sehgal
Přispěvatelé: Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Naess, S, Aiola, S, Austermann, J, Battaglia, N, Beall, J, Becker, D, Bond, R, Calabrese, E, Choi, S, Cothard, N, Crowley, K, Darwish, O, Datta, R, Denison, E, Devlin, M, Duell, C, Duff, S, Duivenvoorden, A, Dunkley, J, Dunner, R, Fox, A, Gallardo, P, Halpern, M, Han, D, Hasselfield, M, Colin Hill, J, Hilton, G, Hilton, M, Hincks, A, Hlozek, R, Ho, S, Hubmayr, J, Huffenberger, K, Hughes, J, Kosowsky, A, Louis, T, Madhavacheril, M, Mcmahon, J, Moodley, K, Nati, F, Nibarger, J, Niemack, M, Page, L, Partridge, B, Salatino, M, Schaan, E, Schillaci, A, Schmitt, B, Sherwin, B, Sehgal, N, Sifon, C, Spergel, D, Staggs, S, Stevens, J, Storer, E, Ullom, J, Vale, L, van Engelen, A, van Lanen, J, Vavagiakis, E, Wollack, E, Xu, Z
Jazyk: angličtina
Předmět:
Zdroj: Journal of Cosmology and Astroparticle Physics
JCAP
JCAP, 2020, 12, pp.046. ⟨10.1088/1475-7516/2020/12/046⟩
Journal of Cosmology and Astroparticle Physics, vol 2020, iss 12
ISSN: 1475-7516
0067-0049
0004-637X
1538-3881
DOI: 10.1088/1475-7516/2020/12/046
Popis: International audience; This paper presents a maximum-likelihood algorithm for combining sky maps with disparate sky coverage, angular resolution and spatially varying anisotropic noise into a single map of the sky. We use this to merge hundreds of individual maps covering the 2008–2018 ACT observing seasons, resulting in by far the deepest ACT maps released so far. We also combine the maps with the full Planck maps, resulting in maps that have the best features of both Planck and ACT: Planck's nearly white noise on intermediate and large angular scales and ACT's high-resolution and sensitivity on small angular scales. The maps cover over 18 000 square degrees, nearly half the full sky, at 100, 150 and 220 GHz. They reveal 4 000 optically-confirmed clusters through the Sunyaev Zel'dovich effect (SZ) and 18 500 point source candidates at > 5σ, the largest single collection of SZ clusters and millimeter wave sources to date. The multi-frequency maps provide millimeter images of nearby galaxies and individual Milky Way nebulae, and even clear detections of several nearby stars. Other anticipated uses of these maps include, for example, thermal SZ and kinematic SZ cluster stacking, CMB cluster lensing and galactic dust science. The method itself has negligible bias. However, due to the preliminary nature of some of the component data sets, we caution that these maps should not be used for precision cosmological analysis. The maps are part of ACT DR5, and will be made available on \href{https://lambda.gsfc.nasa.gov/}{LAMBDA} no later than three months after the journal publication of this article, along with an interactive sky atlas.
Databáze: OpenAIRE
Externí odkaz: