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Start Over Author "Guan, Yilun" Journal journal of cosmology and astroparticle physics
7 results on '"Guan, Yilun"'

1. The Atacama Cosmology Telescope: a measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz

Author

Choi, Steve K, Hasselfield, Matthew, Ho, Shuay-Pwu Patty, Koopman, Brian, Lungu, Marius, Abitbol, Maximilian H, Addison, Graeme E, Ade, Peter AR, Aiola, Simone, Alonso, David, Amiri, Mandana, Amodeo, Stefania, Angile, Elio, Austermann, Jason E, Baildon, Taylor, Battaglia, Nick, Beall, James A, Bean, Rachel, Becker, Daniel T, Bond, J Richard, Bruno, Sarah Marie, Calabrese, Erminia, Calafut, Victoria, Campusano, Luis E, Carrero, Felipe, Chesmore, Grace E, Cho, Hsiao-mei, Clark, Susan E, Cothard, Nicholas F, Crichton, Devin, Crowley, Kevin T, Darwish, Omar, Datta, Rahul, Denison, Edward V, Devlin, Mark J, Duell, Cody J, Duff, Shannon M, Duivenvoorden, Adriaan J, Dunkley, Jo, Dünner, Rolando, Essinger-Hileman, Thomas, Fankhanel, Max, Ferraro, Simone, Fox, Anna E, Fuzia, Brittany, Gallardo, Patricio A, Gluscevic, Vera, Golec, Joseph E, Grace, Emily, Gralla, Megan, Guan, Yilun, Hall, Kirsten, Halpern, Mark, Han, Dongwon, Hargrave, Peter, Henderson, Shawn, Hensley, Brandon, Hill, J Colin, Hilton, Gene C, Hilton, Matt, Hincks, Adam D, Hložek, Renée, Hubmayr, Johannes, Huffenberger, Kevin M, Hughes, John P, Infante, Leopoldo, Irwin, Kent, Jackson, Rebecca, Klein, Jeff, Knowles, Kenda, Kosowsky, Arthur, Lakey, Vincent, Li, Dale, Li, Yaqiong, Li, Zack, Lokken, Martine, Louis, Thibaut, MacInnis, Amanda, Madhavacheril, Mathew, Maldonado, Felipe, Mallaby-Kay, Maya, Marsden, Danica, Maurin, Loïc, McMahon, Jeff, Menanteau, Felipe, Moodley, Kavilan, Morton, Tim, Naess, Sigurd, Namikawa, Toshiya, Nati, Federico, Newburgh, Laura, Nibarger, John P, Nicola, Andrina, Niemack, Michael D, Nolta, Michael R, Orlowski-Sherer, John, Page, Lyman A, Pappas, Christine G, Partridge, Bruce, and Phakathi, Phumlani

Subjects
Particle and High Energy Physics, Physical Sciences, CMBR experiments, CMBR polarisation, cosmological parameters from CMBR, astro-ph.CO, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract

We present the temperature and polarization angular power spectra of the CMB measured by the Atacama Cosmology Telescope (ACT) from 5400 deg2 of the 2013–2016 survey, which covers >15000 deg2 at 98 and 150 GHz. For this analysis we adopt a blinding strategy to help avoid confirmation bias and, related to this, show numerous checks for systematic error done before unblinding. Using the likelihood for the cosmological analysis we constrain secondary sources of anisotropy and foreground emission, and derive a “CMB-only” spectrum that extends to ` = 4000. At large angular scales, foreground emission at 150 GHz is ∼1% of TT and EE within our selected regions and consistent with that found by Planck. Using the same likelihood, we obtain the cosmological parameters for ΛCDM for the ACT data alone with a prior on the optical depth of τ = 0.065 ± 0.015. ΛCDM is a good fit. The best-fit model has a reduced χ2 of 1.07 (PTE = 0.07) with H0 = 67.9 ± 1.5 km/s/Mpc. We show that the lensing BB signal is consistent with ΛCDM and limit the celestial EB polarization angle to ψP = −0.07◦ ±0.09◦. We directly cross correlate ACT with Planck and observe generally good agreement but with some discrepancies in TE. All data on which this analysis is based will be publicly released.

Published
2020

2. The Atacama Cosmology Telescope: DR4 maps and cosmological parameters

Author

Aiola, Simone, Calabrese, Erminia, Maurin, Loïc, Naess, Sigurd, Schmitt, Benjamin L, Abitbol, Maximilian H, Addison, Graeme E, Ade, Peter AR, Alonso, David, Amiri, Mandana, Amodeo, Stefania, Angile, Elio, Austermann, Jason E, Baildon, Taylor, Battaglia, Nick, Beall, James A, Bean, Rachel, Becker, Daniel T, Bond, J Richard, Bruno, Sarah Marie, Calafut, Victoria, Campusano, Luis E, Carrero, Felipe, Chesmore, Grace E, Cho, Hsiao-mei, Choi, Steve K, Clark, Susan E, Cothard, Nicholas F, Crichton, Devin, Crowley, Kevin T, Darwish, Omar, Datta, Rahul, Denison, Edward V, Devlin, Mark J, Duell, Cody J, Duff, Shannon M, Duivenvoorden, Adriaan J, Dunkley, Jo, Dünner, Rolando, Essinger-Hileman, Thomas, Fankhanel, Max, Ferraro, Simone, Fox, Anna E, Fuzia, Brittany, Gallardo, Patricio A, Gluscevic, Vera, Golec, Joseph E, Grace, Emily, Gralla, Megan, Guan, Yilun, Hall, Kirsten, Halpern, Mark, Han, Dongwon, Hargrave, Peter, Hasselfield, Matthew, Helton, Jakob M, Henderson, Shawn, Hensley, Brandon, Hill, J Colin, Hilton, Gene C, Hilton, Matt, Hincks, Adam D, Hložek, Renée, Ho, Shuay-Pwu Patty, Hubmayr, Johannes, Huffenberger, Kevin M, Hughes, John P, Infante, Leopoldo, Irwin, Kent, Jackson, Rebecca, Klein, Jeff, Knowles, Kenda, Koopman, Brian, Kosowsky, Arthur, Lakey, Vincent, Li, Dale, Li, Yaqiong, Li, Zack, Lokken, Martine, Louis, Thibaut, Lungu, Marius, MacInnis, Amanda, Madhavacheril, Mathew, Maldonado, Felipe, Mallaby-Kay, Maya, Marsden, Danica, McMahon, Jeff, Menanteau, Felipe, Moodley, Kavilan, Morton, Tim, Namikawa, Toshiya, Nati, Federico, Newburgh, Laura, Nibarger, John P, Nicola, Andrina, Niemack, Michael D, Nolta, Michael R, Orlowski-Sherer, John, Page, Lyman A, and Pappas, Christine G

Subjects
Astronomical Sciences, Physical Sciences, CMBR experiments, CMBR polarisation, cosmological parameters from CMBR, astro-ph.CO, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract

We present new arcminute-resolution maps of the Cosmic Microwave Background temperature and polarization anisotropy from the Atacama Cosmology Telescope, using data taken from 2013–2016 at 98 and 150 GHz. The maps cover more than 17,000 deg2, the deepest 600 deg2 with noise levels below 10µK-arcmin. We use the power spectrum derived from almost 6,000 deg2 of these maps to constrain cosmology. The ACT data enable a measurement of the angular scale of features in both the divergence-like polarization and the temperature anisotropy, tracing both the velocity and density at last-scattering. From these one can derive the distance to the last-scattering surface and thus infer the local expansion rate, H0. By combining ACT data with large-scale information from WMAP we measure H0 = 67.6±1.1 km/s/Mpc, at 68% confidence, in excellent agreement with the independently-measured Planck satellite estimate (from ACT alone we find H0 = 67.9 ± 1.5 km/s/Mpc). The ΛCDM model provides a good fit to the ACT data, and we find no evidence for deviations: both the spatial curvature, and the departure from the standard lensing signal in the spectrum, are zero to within 1σ; the number of relativistic species, the primordial Helium fraction, and the running of the spectral index are consistent with ΛCDM predictions to within 1.5–2.2σ. We compare ACT, WMAP, and Planck at the parameter level and find good consistency; we investigate how the constraints on the correlated spectral index and baryon density parameters readjust when adding CMB large-scale information that ACT does not measure. The DR4 products presented here will be publicly released on the NASA Legacy Archive for Microwave Background Data Analysis.

Published
2020

3. The Simons Observatory: science goals and forecasts

Author

Ade, Peter, Aguirre, James, Ahmed, Zeeshan, Aiola, Simone, Ali, Aamir, Alonso, David, Alvarez, Marcelo A, Arnold, Kam, Ashton, Peter, Austermann, Jason, Awan, Humna, Baccigalupi, Carlo, Baildon, Taylor, Barron, Darcy, Battaglia, Nick, Battye, Richard, Baxter, Eric, Bazarko, Andrew, Beall, James A, Bean, Rachel, Beck, Dominic, Beckman, Shawn, Beringue, Benjamin, Bianchini, Federico, Boada, Steven, Boettger, David, Bond, J Richard, Borrill, Julian, Brown, Michael L, Bruno, Sarah Marie, Bryan, Sean, Calabrese, Erminia, Calafut, Victoria, Calisse, Paolo, Carron, Julien, Challinor, Anthony, Chesmore, Grace, Chinone, Yuji, Chluba, Jens, Cho, Hsiao-Mei Sherry, Choi, Steve, Coppi, Gabriele, Cothard, Nicholas F, Coughlin, Kevin, Crichton, Devin, Crowley, Kevin D, Crowley, Kevin T, Cukierman, Ari, D'Ewart, John M, Dünner, Rolando, de Haan, Tijmen, Devlin, Mark, Dicker, Simon, Didier, Joy, Dobbs, Matt, Dober, Bradley, Duell, Cody J, Duff, Shannon, Duivenvoorden, Adri, Dunkley, Jo, Dusatko, John, Errard, Josquin, Fabbian, Giulio, Feeney, Stephen, Ferraro, Simone, Fluxà, Pedro, Freese, Katherine, Frisch, Josef C, Frolov, Andrei, Fuller, George, Fuzia, Brittany, Galitzki, Nicholas, Gallardo, Patricio A, Ghersi, Jose Tomas Galvez, Gao, Jiansong, Gawiser, Eric, Gerbino, Martina, Gluscevic, Vera, Goeckner-Wald, Neil, Golec, Joseph, Gordon, Sam, Gralla, Megan, Green, Daniel, Grigorian, Arpi, Groh, John, Groppi, Chris, Guan, Yilun, Gudmundsson, Jon E, Han, Dongwon, Hargrave, Peter, Hasegawa, Masaya, Hasselfield, Matthew, Hattori, Makoto, Haynes, Victor, Hazumi, Masashi, He, Yizhou, Healy, Erin, Henderson, Shawn W, Hervias-Caimapo, Carlos, and Hill, Charles A

Subjects
Particle and High Energy Physics, Astronomical Sciences, Physical Sciences, CMBR experiments, CMBR polarisation, cosmological parameters from CMBR, astro-ph.CO, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract

The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scientific goals of the experiment, motivate the design, and forecast its performance. SO will measure the temperature and polarization anisotropy of the cosmic microwave background in six frequency bands centered at: 27, 39, 93, 145, 225 and 280 GHz. The initial configuration of SO will have three small-aperture 0.5-m telescopes and one large-aperture 6-m telescope, with a total of 60,000 cryogenic bolometers. Our key science goals are to characterize the primordial perturbations, measure the number of relativistic species and the mass of neutrinos, test for deviations from a cosmological constant, improve our understanding of galaxy evolution, and constrain the duration of reionization. The small aperture telescopes will target the largest angular scales observable from Chile, mapping 10% of the sky to a white noise level of 2 μK-arcmin in combined 93 and 145 GHz bands, to measure the primordial tensor-to-scalar ratio, r, at a target level of σ(r)=0.003. The large aperture telescope will map 40% of the sky at arcminute angular resolution to an expected white noise level of 6 μK-arcmin in combined 93 and 145 GHz bands, overlapping with the majority of the Large Synoptic Survey Telescope sky region and partially with the Dark Energy Spectroscopic Instrument. With up to an order of magnitude lower polarization noise than maps from the Planck satellite, the high-resolution sky maps will constrain cosmological parameters derived from the damping tail, gravitational lensing of the microwave background, the primordial bispectrum, and the thermal and kinematic Sunyaev-Zel'dovich effects, and will aid in delensing the large-angle polarization signal to measure the tensor-to-scalar ratio. The survey will also provide a legacy catalog of 16,000 galaxy clusters and more than 20,000 extragalactic sources.

Published
2019

4. The Atacama Cosmology Telescope: map-based noise simulations for DR6

Author

Atkins, Zachary, primary, Duivenvoorden, Adriaan J., additional, Coulton, William R., additional, Qu, Frank J., additional, Aiola, Simone, additional, Calabrese, Erminia, additional, Chesmore, Grace E., additional, Choi, Steve K., additional, Devlin, Mark J., additional, Dunkley, Jo, additional, Hervías-Caimapo, Carlos, additional, Guan, Yilun, additional, Posta, Adrien La, additional, Li, Zack, additional, Louis, Thibaut, additional, Madhavacheril, Mathew S., additional, Moodley, Kavilan, additional, Naess, Sigurd, additional, Nati, Federico, additional, Niemack, Michael D., additional, Page, Lyman, additional, Puddu, Roberto, additional, Salatino, Maria, additional, Sifón, Cristóbal, additional, Staggs, Suzanne T., additional, Vargas, Cristian, additional, Vavagiakis, Eve M., additional, and Wollack, Edward J., additional

Published
2023
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5. The Atacama Cosmology Telescope: limits on dark matter-baryon interactions from DR4 power spectra

Author

Li, Zack, primary, An, Rui, additional, Gluscevic, Vera, additional, Boddy, Kimberly K., additional, Bond, J. Richard, additional, Calabrese, Erminia, additional, Dunkley, Jo, additional, Gallardo, Patricio A., additional, Guan, Yilun, additional, Hincks, Adam, additional, Huffenberger, Kevin M., additional, Kosowsky, Arthur, additional, Louis, Thibaut, additional, Madhavacheril, Mathew S., additional, Moodley, Kavilan, additional, Page, Lyman A., additional, Partridge, Bruce, additional, Qu, Frank J., additional, Salatino, Maria, additional, Sherwin, Blake, additional, Sifón, Cristóbal, additional, Vargas, Cristian, additional, and Wollack, Edward J., additional

Published
2023
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6. The Atacama Cosmology Telescope: measurement and analysis of 1D beams for DR4

Author

Lungu, Marius, primary, Storer, Emilie R., additional, Hasselfield, Matthew, additional, Duivenvoorden, Adriaan J., additional, Calabrese, Erminia, additional, Chesmore, Grace E., additional, Choi, Steve K., additional, Dunkley, Jo, additional, Dünner, Rolando, additional, Gallardo, Patricio A., additional, Golec, Joseph E., additional, Guan, Yilun, additional, Hill, J. Colin, additional, Hincks, Adam D., additional, Hubmayr, Johannes, additional, Madhavacheril, Mathew S., additional, Mallaby-Kay, Maya, additional, McMahon, Jeff, additional, Moodley, Kavilan, additional, Naess, Sigurd, additional, Nati, Federico, additional, Niemack, Michael D., additional, Page, Lyman A., additional, Partridge, Bruce, additional, Puddu, Roberto, additional, Schillaci, Alessandro, additional, Sifón, Cristóbal, additional, Staggs, Suzanne, additional, Sunder, Dhaneshwar D., additional, Wollack, Edward J., additional, and Xu, Zhilei, additional

Published
2022
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7. The Simons Observatory: science goals and forecasts

Author

Ade, Peter, Aguirre, James, Ahmed, Zeeshan, Aiola, Simone, Ali, Aamir, Alonso, David, Alvarez, Marcelo A., Arnold, Kam, Ashton, Peter, Austermann, Jason, Awan, Humna, Baccigalupi, Carlo, Baildon, Taylor, Barron, Darcy, Battaglia, Nick, Battye, Richard, Baxter, Eric, Bazarko, Andrew, Beall, James A., Bean, Rachel, Beck, Dominic, Beckman, Shawn, Beringue, Benjamin, Bianchini, Federico, Boada, Steven, Boettger, David, Richard Bond, J., Borrill, Julian, Brown, Michael L., Bruno, Sarah Marie, Bryan, Sean, Calabrese, Erminia, Calafut, Victoria, Calisse, Paolo, Carron, Julien, Challinor, Anthony, Chesmore, Grace, Chinone, Yuji, Chluba, Jens, Cho, Hsiao-Mei Sherry, Choi, Steve, Coppi, Gabriele, Cothard, Nicholas F., Coughlin, Kevin, Crichton, Devin, Crowley, Kevin D., Crowley, Kevin T., Cukierman, Ari, D`Ewart, Mitch, Dünner, Rolando, de Haan, Tijmen, Devlin, Mark, Dicker, Simon, DIDIER, JOY, Dobbs, Matt, Dober, Bradley, Duell, Cody, Duff, Shannon, Duivenvoorden, Adri, Dunkley, Jo, Dusatko, John, Errard, Josquin, Fabbian, Giulio, Feeney, Stephen, Ferraro, Simone, Fluxà, Pedro, Freese, Katherine, Frisch, Josef, Frolov, Andrei, Fuller, George, Fuzia, Brittany, Galitzki, Nicholas, Gallardo, Patricio A., Galvez Ghersi, Jose Tomas, Gao, Jiansong, Gawiser, Eric, Gerbino, Martina, Gluscevic, Vera, Goeckner-Wald, Neil, Golec, Joseph, Gordon, Sam, Gralla, Megan, Green, Daniel, Grigorian, Arpi, Groh, John, Groppi, Chris, Guan, Yilun, Gudmundsson, Jon E., Han, Dongwon, Hargrave, Peter, Hasegawa, Masaya, Hasselfield, Matthew, Hattori, Makoto, Haynes, Victor, Hazumi, Masashi, He, Yizhou, Healy, Erin, Henderson, Shawn, Hervias-Caimapo, Carlos, Hill, Charles A., Colin Hill, J., HILTON, GENE, Hilton, Matt, Hincks, Adam D., Hinshaw, Gary, Hložek, Renée, Ho, Shirley, Ho, Shuay-Pwu Patty, Howe, Logan, Huang, Zhiqi, Hubmayr, Johannes, Huffenberger, Kevin, Hughes, John P., Ijjas, Anna, Ikape, Margaret, Irwin, Kent, Jaffe, Andrew H., Jain, Bhuvnesh, Jeong, Oliver, Kaneko, Daisuke, Karpel, Ethan, Katayama, Nobuhiko, Keating, Brian, Kernasovski, Sarah, Keskitalo, Reijo, Kisner, Theodore, Kiuchi, Kenji, Klein, Jeff, Knowles, Kenda, Koopman, Brian, Kosowsky, Arthur, Krachmalnicoff, Nicoletta, Kuenstner, Stephen, Kuo, Chao-Lin, Kusaka, Akito, Lashner, Jacob, Lee, Adrian, Lee, Eunseong, Leon, David, Leung, Jason S.-Y., Lewis, Antony, Li, Yaqiong, Li, Zack, Limon, Michele, Linder, Eric, Lopez-Caraballo, Carlos, Louis, Thibaut, Lowry, Lindsay, Lungu, Marius, Madhavacheril, Mathew, Mak, Daisy, Maldonado, Felipe, Mani, Hamdi, Mates, Ben, Matsuda, Frederick, Maurin, Loïc, Mauskopf, Phil, May, Andrew, McCallum, Nialh, McKenney, Chris, McMahon, Jeff, Daniel Meerburg, P., Meyers, Joel, Miller, Amber, Mirmelstein, Mark, Moodley, Kavilan, Munchmeyer, Moritz, Munson, Charles, Naess, Sigurd, Nati, Federico, Navaroli, Martin, Newburgh, Laura, Nguyen, Ho Nam, Niemack, Mike, Nishino, Haruki, Orlowski-Scherer, John, Page, Lyman, Partridge, Bruce, Peloton, Julien, Perrotta, Francesca, Piccirillo, Lucio, Pisano, Giampaolo, Poletti, Davide, Puddu, Roberto, Puglisi, Giuseppe, Raum, Chris, Reichardt, Christian L., Remazeilles, Mathieu, Rephaeli, Yoel, Riechers, Dominik, Rojas, Felipe, Roy, Anirban, Sadeh, Sharon, Sakurai, Yuki, Salatino, Maria, Rao, Mayuri Sathyanarayana, Schaan, Emmanuel, Schmittfull, Marcel, Sehgal, Neelima, Seibert, Joseph, Seljak, Uros, Sherwin, Blake, Shimon, Meir, Sierra, Carlos, Sievers, Jonathan, Sikhosana, Precious, Silva-Feaver, Max, Simon, Sara M., Sinclair, Adrian, Siritanasak, Praween, Smith, Kendrick, Smith, Steve, Spergel, David, Staggs, Suzanne, Stein, George, Stevens, Jason R., Stompor, Radek, Suzuki, Aritoki, Tajima, Osamu, Takakura, Satoru, Teply, Grant, Thomas, Daniel B., Thorne, Ben, Thornton, Robert, Trac, Hy, Tsai, Calvin, Tucker, Carole, Ullom, Joel, Vagnozzi, Sunny, van Engelen, Alexander, Van Lanen, Jeff, van Winkle, Dan, Vavagiakis, Eve M., Vergès, Clara, Vissers, Michael, Wagoner, Kasey, Walker, Samantha, Ward, Jon, WESTBROOK, BEN, Whitehorn, Nathan, Williams, Jason, Williams, Joel, Wollack, Edward J., Xu, Zhilei, Ye, Jiani, Yu, Byeonghee, Yu, Cyndria, Zago, Fernando, Zhang, Hezi, Zhu, Ningfeng, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), Simons Observatory, Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), ANR-17-CE31-0022,BxB,Champs B interstellaires et modes B de l'inflation(2017), Ade, P, Aguirre, J, Ahmed, Z, Aiola, S, Ali, A, Alonso, D, Alvarez, M, Arnold, K, Ashton, P, Austermann, J, Awan, H, Baccigalupi, C, Baildon, T, Barron, D, Battaglia, N, Battye, R, Baxter, E, Bazarko, A, Beall, J, Bean, R, Beck, D, Beckman, S, Beringue, B, Bianchini, F, Boada, S, Boettger, D, Bond, J, Borrill, J, Brown, M, Bruno, S, Bryan, S, Calabrese, E, Calafut, V, Calisse, P, Carron, J, Challinor, A, Chesmore, G, Chinone, Y, Chluba, J, Cho, H, Choi, S, Coppi, G, Cothard, N, Coughlin, K, Crichton, D, Crowley, K, Cukierman, A, D'Ewart, J, Dünner, R, de Haan, T, Devlin, M, Dicker, S, Didier, J, Dobbs, M, Dober, B, Duell, C, Duff, S, Duivenvoorden, A, Dunkley, J, Dusatko, J, Errard, J, Fabbian, G, Feeney, S, Ferraro, S, Fluxà, P, Freese, K, Frisch, J, Frolov, A, Fuller, G, Fuzia, B, Galitzki, N, Gallardo, P, Ghersi, J, Gao, J, Gawiser, E, Gerbino, M, Gluscevic, V, Goeckner-Wald, N, Golec, J, Gordon, S, Gralla, M, Green, D, Grigorian, A, Groh, J, Groppi, C, Guan, Y, Gudmundsson, J, Han, D, Hargrave, P, Hasegawa, M, Hasselfield, M, Hattori, M, Haynes, V, Hazumi, M, He, Y, Healy, E, Henderson, S, Hervias-Caimapo, C, Hill, C, Hill, J, Hilton, G, Hilton, M, Hincks, A, Hinshaw, G, Hložek, R, Ho, S, Howe, L, Huang, Z, Hubmayr, J, Huffenberger, K, Hughes, J, Ijjas, A, Ikape, M, Irwin, K, Jaffe, A, Jain, B, Jeong, O, Kaneko, D, Karpel, E, Katayama, N, Keating, B, Kernasovskiy, S, Keskitalo, R, Kisner, T, Kiuchi, K, Klein, J, Knowles, K, Koopman, B, Kosowsky, A, Krachmalnicoff, N, Kuenstner, S, Kuo, C, Kusaka, A, Lashner, J, Lee, A, Lee, E, Leon, D, Leung, J, Lewis, A, Li, Y, Li, Z, Limon, M, Linder, E, Lopez-Caraballo, C, Louis, T, Lowry, L, Lungu, M, Madhavacheril, M, Mak, D, Maldonado, F, Mani, H, Mates, B, Matsuda, F, Maurin, L, Mauskopf, P, May, A, Mccallum, N, Mckenney, C, Mcmahon, J, Meerburg, P, Meyers, J, Miller, A, Mirmelstein, M, Moodley, K, Munchmeyer, M, Munson, C, Naess, S, Nati, F, Navaroli, M, Newburgh, L, Nguyen, H, Niemack, M, Nishino, H, Orlowski-Scherer, J, Page, L, Partridge, B, Peloton, J, Perrotta, F, Piccirillo, L, Pisano, G, Poletti, D, Puddu, R, Puglisi, G, Raum, C, Reichardt, C, Remazeilles, M, Rephaeli, Y, Riechers, D, Rojas, F, Roy, A, Sadeh, S, Sakurai, Y, Salatino, M, Rao, M, Schaan, E, Schmittfull, M, Sehgal, N, Seibert, J, Seljak, U, Sherwin, B, Shimon, M, Sierra, C, Sievers, J, Sikhosana, P, Silva-Feaver, M, Simon, S, Sinclair, A, Siritanasak, P, Smith, K, Smith, S, Spergel, D, Staggs, S, Stein, G, Stevens, J, Stompor, R, Suzuki, A, Tajima, O, Takakura, S, Teply, G, Thomas, D, Thorne, B, Thornton, R, Trac, H, Tsai, C, Tucker, C, Ullom, J, Vagnozzi, S, Engelen, A, Lanen, J, Winkle, D, Vavagiakis, E, Vergès, C, Vissers, M, Wagoner, K, Walker, S, Ward, J, Westbrook, B, Whitehorn, N, Williams, J, Wollack, E, Xu, Z, Yu, B, Yu, C, Zago, F, Zhang, H, Zhu, N, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and High-Energy Frontier

Subjects
CMBR polarisation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, Cosmic microwave background, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 7. Clean energy, law.invention, Telescope, symbols.namesake, Settore FIS/05 - Astronomia e Astrofisica, Observatory, law, 0103 physical sciences, CMBR experiments, Cosmological parameters from CMBR, Astronomy and Astrophysics, Planck, Reionization, QC, Astrophysics::Galaxy Astrophysics, media_common, Physics, 010308 nuclear & particles physics, Settore FIS/05, Astrophysics::Instrumentation and Methods for Astrophysics, cosmological parameters from CMBR, Nuclear & Particles Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Gravitational lens, 13. Climate action, Sky, symbols, astro-ph.CO, Neutrino, Cosmology and Nongalactic Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scientific goals of the experiment, motivate the design, and forecast its performance. SO will measure the temperature and polarization anisotropy of the cosmic microwave background in six frequency bands: 27, 39, 93, 145, 225 and 280 GHz. The initial configuration of SO will have three small-aperture 0.5-m telescopes (SATs) and one large-aperture 6-m telescope (LAT), with a total of 60,000 cryogenic bolometers. Our key science goals are to characterize the primordial perturbations, measure the number of relativistic species and the mass of neutrinos, test for deviations from a cosmological constant, improve our understanding of galaxy evolution, and constrain the duration of reionization. The SATs will target the largest angular scales observable from Chile, mapping ~10% of the sky to a white noise level of 2 $\mu$K-arcmin in combined 93 and 145 GHz bands, to measure the primordial tensor-to-scalar ratio, $r$, at a target level of $\sigma(r)=0.003$. The LAT will map ~40% of the sky at arcminute angular resolution to an expected white noise level of 6 $\mu$K-arcmin in combined 93 and 145 GHz bands, overlapping with the majority of the LSST sky region and partially with DESI. With up to an order of magnitude lower polarization noise than maps from the Planck satellite, the high-resolution sky maps will constrain cosmological parameters derived from the damping tail, gravitational lensing of the microwave background, the primordial bispectrum, and the thermal and kinematic Sunyaev-Zel'dovich effects, and will aid in delensing the large-angle polarization signal to measure the tensor-to-scalar ratio. The survey will also provide a legacy catalog of 16,000 galaxy clusters and more than 20,000 extragalactic sources., Comment: This paper presents an overview of the Simons Observatory science goals, details about the instrument will be presented in a companion paper. The author contribution to this paper is available at https://simonsobservatory.org/publications.php (Abstract abridged) -- matching version published in JCAP

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