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17 results on '"Vavagiakis, EM"'

1. The Atacama Cosmology Telescope: Systematic Transient Search of 3 Day Maps

Author

Li, Y, Biermann, E, Naess, S, Aiola, S, An, R, Battaglia, N, Bhandarkar, T, Calabrese, E, Choi, S, Crowley, K, Devlin, M, Duell, C, Duff, S, Dunkley, J, Dünner, R, Gallardo, P, Guan, Y, Hervias-Caimapo, C, Hincks, A, Hubmayr, J, Huffenberger, K, Hughes, J, Kosowsky, A, Louis, T, Mallaby-Kay, M, Mcmahon, J, Nati, F, Niemack, M, Orlowski-Scherer, J, Page, L, Salatino, M, Sifón, C, Staggs, S, Vargas, C, Vavagiakis, E, Wang, Y, Wollack, E, Li, YQ, Choi, SK, Crowley, KT, Duell, CJ, Duff, SM, Gallardo, PA, Guan, YL, Hincks, AD, Huffenberger, KM, Hughes, JP, Niemack, MD, Staggs, ST, Vavagiakis, EM, Wang, YH, Wollack, EJ, Li, Y, Biermann, E, Naess, S, Aiola, S, An, R, Battaglia, N, Bhandarkar, T, Calabrese, E, Choi, S, Crowley, K, Devlin, M, Duell, C, Duff, S, Dunkley, J, Dünner, R, Gallardo, P, Guan, Y, Hervias-Caimapo, C, Hincks, A, Hubmayr, J, Huffenberger, K, Hughes, J, Kosowsky, A, Louis, T, Mallaby-Kay, M, Mcmahon, J, Nati, F, Niemack, M, Orlowski-Scherer, J, Page, L, Salatino, M, Sifón, C, Staggs, S, Vargas, C, Vavagiakis, E, Wang, Y, Wollack, E, Li, YQ, Choi, SK, Crowley, KT, Duell, CJ, Duff, SM, Gallardo, PA, Guan, YL, Hincks, AD, Huffenberger, KM, Hughes, JP, Niemack, MD, Staggs, ST, Vavagiakis, EM, Wang, YH, and Wollack, EJ

Abstract

We conduct a systematic search for transients in 3 yr of data (2017-2019) from the Atacama Cosmology Telescope (ACT). ACT covers 40% of the sky at three bands spanning from 77-277 GHz. Analysis of 3 day mean-subtracted sky maps, which were match filtered for point sources, yielded 29 transient detections. Eight of these transients are due to known asteroids, and three others were previously published. Four of these events occur in areas with poor noise models and thus we cannot be confident they are real transients. We are left with 14 new transient events occurring at 11 unique locations. All of these events are associated with either rotationally variable stars or cool stars. Ten events have flat or falling spectra indicating radiation from synchrotron emission. One event has a rising spectrum indicating a different engine for the flare.

Published
2023

2. The Atacama Cosmology Telescope: Probing the baryon content of SDSS DR15 galaxies with the thermal and kinematic Sunyaev-Zel’dovich effects

Author

Vavagiakis, EM, Vavagiakis, EM, Gallardo, PA, Calafut, V, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, Xu, Z, Vavagiakis, EM, Vavagiakis, EM, Gallardo, PA, Calafut, V, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, and Xu, Z

Abstract

We present measurements of the average thermal Sunyaev Zel’dovich (tSZ) effect from optically selected galaxy groups and clusters at high signal-to-noise (up to ) and estimate their baryon content within a radius aperture. Sources from the Sloan Digital Sky Survey Baryon Oscillation Spectroscopic Survey DR15 catalog overlap with 3,700 sq deg of sky observed by the Atacama Cosmology Telescope (ACT) from 2008 to 2018 at 150 and 98 GHz (ACT DR5), and 2,089 sq deg of internal linear combination component-separated maps combining ACT and Planck data (ACT DR4). The corresponding optical depths , which depend on the baryon content of the halos, are estimated using results from cosmological hydrodynamic simulations assuming an active galactic nuclei feedback radiative cooling model. We estimate the mean mass of the halos in multiple luminosity bins, and compare the tSZ-based estimates to theoretical predictions of the baryon content for a Navarro-Frenk-White profile. We do the same for estimates extracted from fits to pairwise baryon momentum measurements of the kinematic Sunyaev-Zel’dovich effect (kSZ) for the same dataset obtained in a companion paper. We find that the estimates from the tSZ measurements in this work and the kSZ measurements in the companion paper agree within for two out of the three disjoint luminosity bins studied, while they differ by in the highest luminosity bin. The optical depth estimates account for one-third to all of the theoretically predicted baryon content in the halos across luminosity bins. Potential systematic uncertainties are discussed. The tSZ and kSZ measurements provide a step toward empirical Compton- relationships to provide new tests of cluster formation and evolution models.

Published
2021

3. The Atacama Cosmology Telescope: Probing the baryon content of SDSS DR15 galaxies with the thermal and kinematic Sunyaev-Zel’dovich effects

Author

Vavagiakis, EM, Vavagiakis, EM, Gallardo, PA, Calafut, V, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, Xu, Z, Vavagiakis, EM, Vavagiakis, EM, Gallardo, PA, Calafut, V, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, and Xu, Z

Abstract

We present measurements of the average thermal Sunyaev Zel’dovich (tSZ) effect from optically selected galaxy groups and clusters at high signal-to-noise (up to ) and estimate their baryon content within a radius aperture. Sources from the Sloan Digital Sky Survey Baryon Oscillation Spectroscopic Survey DR15 catalog overlap with 3,700 sq deg of sky observed by the Atacama Cosmology Telescope (ACT) from 2008 to 2018 at 150 and 98 GHz (ACT DR5), and 2,089 sq deg of internal linear combination component-separated maps combining ACT and Planck data (ACT DR4). The corresponding optical depths , which depend on the baryon content of the halos, are estimated using results from cosmological hydrodynamic simulations assuming an active galactic nuclei feedback radiative cooling model. We estimate the mean mass of the halos in multiple luminosity bins, and compare the tSZ-based estimates to theoretical predictions of the baryon content for a Navarro-Frenk-White profile. We do the same for estimates extracted from fits to pairwise baryon momentum measurements of the kinematic Sunyaev-Zel’dovich effect (kSZ) for the same dataset obtained in a companion paper. We find that the estimates from the tSZ measurements in this work and the kSZ measurements in the companion paper agree within for two out of the three disjoint luminosity bins studied, while they differ by in the highest luminosity bin. The optical depth estimates account for one-third to all of the theoretically predicted baryon content in the halos across luminosity bins. Potential systematic uncertainties are discussed. The tSZ and kSZ measurements provide a step toward empirical Compton- relationships to provide new tests of cluster formation and evolution models.

Published
2021

4. The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies ()

Author

Calafut, V, Calafut, V, Gallardo, PA, Vavagiakis, EM, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, Xu, Z, Calafut, V, Calafut, V, Gallardo, PA, Vavagiakis, EM, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, and Xu, Z

Abstract

We present a detection of the pairwise kinematic Sunyaev-Zeldovich (kSZ) effect using Atacama Cosmology Telescope (ACT) and Planck CMB observations in combination with Luminous Red Galaxy samples from the Sloan Digital Sky Survey (SDSS) DR15 catalog. Results are obtained using three ACT CMB maps: co-added 150 and 98 GHz maps, combining observations from 2008-2018 (ACT DR5), which overlap with SDSS DR15 over 3,700 sq. deg., and a component-separated map using night-time only observations from 2014-2015 (ACT DR4), overlapping with SDSS DR15 over 2,089 sq. deg. Comparisons of the results from these three maps provide consistency checks in relation to potential frequency-dependent foreground contamination. A total of 343,647 galaxies are used as tracers to identify and locate galaxy groups and clusters from which the kSZ signal is extracted using aperture photometry. We consider the impact of various aperture photometry assumptions and covariance estimation methods on the signal extraction. Theoretical predictions of the pairwise velocities are used to obtain best-fit, mass-averaged, optical depth estimates for each of five luminosity-selected tracer samples. A comparison of the kSZ-derived optical depth measurements obtained here to those derived from the thermal SZ effect for the same sample is presented in a companion paper.

Published
2021

5. The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center

Author

Guan, Y, Guan, Y, Clark, SE, Hensley, BS, Gallardo, PA, Naess, S, Duell, CJ, Aiola, S, Atkins, Z, Calabrese, E, Choi, SK, Cothard, NF, Devlin, M, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Hasselfield, M, Hughes, JP, Koopman, BJ, Kosowsky, AB, Madhavacheril, MS, McMahon, J, Nati, F, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Sehgal, N, Sifón, C, Staggs, S, Vavagiakis, EM, Wollack, EJ, Xu, Z, Guan, Y, Guan, Y, Clark, SE, Hensley, BS, Gallardo, PA, Naess, S, Duell, CJ, Aiola, S, Atkins, Z, Calabrese, E, Choi, SK, Cothard, NF, Devlin, M, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Hasselfield, M, Hughes, JP, Koopman, BJ, Kosowsky, AB, Madhavacheril, MS, McMahon, J, Nati, F, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Sehgal, N, Sifón, C, Staggs, S, Vavagiakis, EM, Wollack, EJ, and Xu, Z

Abstract

We present arcminute-resolution intensity and polarization maps of the Galactic center made with the Atacama Cosmology Telescope. The maps cover a 32 deg2 field at 98, 150, and 224 GHz with |l| ≤ 4 , |b| ≤ 2 . We combine these data with Planck observations at similar frequencies to create coadded maps with increased sensitivity at large angular scales. With the coadded maps, we are able to resolve many known features of the Central Molecular Zone (CMZ) in both total intensity and polarization. We map the orientation of the plane-of-sky component of the Galactic magnetic field inferred from the polarization angle in the CMZ, finding significant changes in morphology in the three frequency bands as the underlying dominant emission mechanism changes from synchrotron to dust emission. Selected Galactic center sources, including Sgr A∗, the Brick molecular cloud (G0.253+0.016), the Mouse pulsar wind nebula (G359.23-0.82), and the Tornado supernova remnant candidate (G357.7-0.1), are examined in detail. These data illustrate the potential for leveraging ground-based cosmic microwave background polarization experiments for Galactic science.

Published
2021

6. The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev-Zel'dovich Galaxy Clusters

Author

Hilton, M, Sifon, C, Naess, S, Madhavacheril, M, Oguri, M, Rozo, E, Rykoff, E, Abbott, TMC, Adhikari, S, Aguena, M, Aiola, S, Allam, S, Amodeo, S, Amon, A, Annis, J, Ansarinejad, B, Aros-Bunster, C, Austermann, JE, Avila, S, Bacon, D, Battaglia, N, Beall, JA, Becker, DT, Bernstein, GM, Bertin, E, Bhandarkar, T, Bhargava, S, Bond, JR, Brooks, D, Burke, DL, Calabrese, E, Carrasco Kind, M, Carretero, J, Choi, SK, Choi, A, Conselice, C, Costa, LND, Costanzi, M, Crichton, D, Crowley, KT, Dunner, R, Denison, EV, Devlin, MJ, Dicker, SR, Diehl, HT, Dietrich, JP, Doel, P, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Everett, S, Ferraro, S, Ferrero, I, Ferte, A, Flaugher, B, Frieman, J, Gallardo, PA, Garcia-Bellido, J, Gaztanaga, E, Gerdes, DW, Giles, P, Golec, JE, Gralla, MB, Grandis, S, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Han, D, Hartley, WG, Hasselfield, M, Hill, JC, Hilton, GC, Hincks, AD, Hinton, SR, Ho, S-PP, Honscheid, K, Hoyle, B, Hubmayr, J, Huffenberger, KM, Hughes, JP, Jaelani, AT, Jain, B, James, DJ, Jeltema, T, Kent, S, Knowles, K, Koopman, BJ, Kuehn, K, Lahav, O, Lima, M, Lin, Y-T, Lokken, M, Loubser, SI, MacCrann, N, Maia, MAG, Marriage, TA, Martin, J, McMahon, J, Melchior, P, Menanteau, F, Miquel, R, Miyatake, H, Moodley, K, Morgan, R, Mroczkowski, T, Nati, F, Newburgh, LB, Niemack, MD, Nishizawa, AJ, Ogando, RLC, Orlowski-Scherer, J, Page, LA, Palmese, A, Partridge, B, Paz-Chinchon, F, Phakathi, P, Plazas, AA, Robertson, NC, Romer, AK, Rosell, AC, Salatino, M, Sanchez, E, Schaan, E, Schillaci, A, Sehgal, N, Serrano, S, Shin, T, Simon, SM, Smith, M, Soares-Santos, M, Spergel, DN, Staggs, ST, Storer, ER, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D, To, C, Trac, H, Ullom, JN, Vale, LR, Lanen, JV, Vavagiakis, EM, Vicente, JD, Wilkinson, RD, Wollack, EJ, Xu, Z, Zhang, Y, Hilton, M, Sifon, C, Naess, S, Madhavacheril, M, Oguri, M, Rozo, E, Rykoff, E, Abbott, TMC, Adhikari, S, Aguena, M, Aiola, S, Allam, S, Amodeo, S, Amon, A, Annis, J, Ansarinejad, B, Aros-Bunster, C, Austermann, JE, Avila, S, Bacon, D, Battaglia, N, Beall, JA, Becker, DT, Bernstein, GM, Bertin, E, Bhandarkar, T, Bhargava, S, Bond, JR, Brooks, D, Burke, DL, Calabrese, E, Carrasco Kind, M, Carretero, J, Choi, SK, Choi, A, Conselice, C, Costa, LND, Costanzi, M, Crichton, D, Crowley, KT, Dunner, R, Denison, EV, Devlin, MJ, Dicker, SR, Diehl, HT, Dietrich, JP, Doel, P, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Everett, S, Ferraro, S, Ferrero, I, Ferte, A, Flaugher, B, Frieman, J, Gallardo, PA, Garcia-Bellido, J, Gaztanaga, E, Gerdes, DW, Giles, P, Golec, JE, Gralla, MB, Grandis, S, Gruen, D, Gruendl, RA, Gschwend, J, Gutierrez, G, Han, D, Hartley, WG, Hasselfield, M, Hill, JC, Hilton, GC, Hincks, AD, Hinton, SR, Ho, S-PP, Honscheid, K, Hoyle, B, Hubmayr, J, Huffenberger, KM, Hughes, JP, Jaelani, AT, Jain, B, James, DJ, Jeltema, T, Kent, S, Knowles, K, Koopman, BJ, Kuehn, K, Lahav, O, Lima, M, Lin, Y-T, Lokken, M, Loubser, SI, MacCrann, N, Maia, MAG, Marriage, TA, Martin, J, McMahon, J, Melchior, P, Menanteau, F, Miquel, R, Miyatake, H, Moodley, K, Morgan, R, Mroczkowski, T, Nati, F, Newburgh, LB, Niemack, MD, Nishizawa, AJ, Ogando, RLC, Orlowski-Scherer, J, Page, LA, Palmese, A, Partridge, B, Paz-Chinchon, F, Phakathi, P, Plazas, AA, Robertson, NC, Romer, AK, Rosell, AC, Salatino, M, Sanchez, E, Schaan, E, Schillaci, A, Sehgal, N, Serrano, S, Shin, T, Simon, SM, Smith, M, Soares-Santos, M, Spergel, DN, Staggs, ST, Storer, ER, Suchyta, E, Swanson, MEC, Tarle, G, Thomas, D, To, C, Trac, H, Ullom, JN, Vale, LR, Lanen, JV, Vavagiakis, EM, Vicente, JD, Wilkinson, RD, Wollack, EJ, Xu, Z, and Zhang, Y

Abstract

We present a catalog of 4195 optically confirmed Sunyaev–Zel’dovich (SZ) selected galaxy clusters detected with signal-to-noise ratio >4 in 13,211 deg2 of sky surveyed by the Atacama Cosmology Telescope (ACT). Cluster candidates were selected by applying a multifrequency matched filter to 98 and 150 GHz maps constructed from ACT observations obtained from 2008 to 2018 and confirmed using deep, wide-area optical surveys. The clusters span the redshift range 0.04 < z < 1.91 (median z = 0.52). The catalog contains 222 z > 1 clusters, and a total of 868 systems are new discoveries. Assuming an SZ signal versus mass-scaling relation calibrated from X-ray observations, the sample has a 90% completeness mass limit of M 500c > 3.8 × 1014 M ⊙, evaluated at z = 0.5, for clusters detected at signal-to-noise ratio >5 in maps filtered at an angular scale of 2.′4. The survey has a large overlap with deep optical weak-lensing surveys that are being used to calibrate the SZ signal mass-scaling relation, such as the Dark Energy Survey (4566 deg2), the Hyper Suprime-Cam Subaru Strategic Program (469 deg2), and the Kilo Degree Survey (825 deg2). We highlight some noteworthy objects in the sample, including potentially projected systems, clusters with strong lensing features, clusters with active central galaxies or star formation, and systems of multiple clusters that may be physically associated. The cluster catalog will be a useful resource for future cosmological analyses and studying the evolution of the intracluster medium and galaxies in massive clusters over the past 10 Gyr.

Published
2021

7. The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center

Author

Guan, Y, Guan, Y, Clark, SE, Hensley, BS, Gallardo, PA, Naess, S, Duell, CJ, Aiola, S, Atkins, Z, Calabrese, E, Choi, SK, Cothard, NF, Devlin, M, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Hasselfield, M, Hughes, JP, Koopman, BJ, Kosowsky, AB, Madhavacheril, MS, McMahon, J, Nati, F, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Sehgal, N, Sifón, C, Staggs, S, Vavagiakis, EM, Wollack, EJ, Xu, Z, Guan, Y, Guan, Y, Clark, SE, Hensley, BS, Gallardo, PA, Naess, S, Duell, CJ, Aiola, S, Atkins, Z, Calabrese, E, Choi, SK, Cothard, NF, Devlin, M, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Hasselfield, M, Hughes, JP, Koopman, BJ, Kosowsky, AB, Madhavacheril, MS, McMahon, J, Nati, F, Niemack, MD, Page, LA, Salatino, M, Schaan, E, Sehgal, N, Sifón, C, Staggs, S, Vavagiakis, EM, Wollack, EJ, and Xu, Z

Abstract

We present arcminute-resolution intensity and polarization maps of the Galactic center made with the Atacama Cosmology Telescope. The maps cover a 32 deg2 field at 98, 150, and 224 GHz with |l| ≤ 4 , |b| ≤ 2 . We combine these data with Planck observations at similar frequencies to create coadded maps with increased sensitivity at large angular scales. With the coadded maps, we are able to resolve many known features of the Central Molecular Zone (CMZ) in both total intensity and polarization. We map the orientation of the plane-of-sky component of the Galactic magnetic field inferred from the polarization angle in the CMZ, finding significant changes in morphology in the three frequency bands as the underlying dominant emission mechanism changes from synchrotron to dust emission. Selected Galactic center sources, including Sgr A∗, the Brick molecular cloud (G0.253+0.016), the Mouse pulsar wind nebula (G359.23-0.82), and the Tornado supernova remnant candidate (G357.7-0.1), are examined in detail. These data illustrate the potential for leveraging ground-based cosmic microwave background polarization experiments for Galactic science.

Published
2021

8. The Atacama Cosmology Telescope: Detection of the pairwise kinematic Sunyaev-Zel’dovich effect with SDSS DR15 galaxies ()

Author

Calafut, V, Calafut, V, Gallardo, PA, Vavagiakis, EM, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, Xu, Z, Calafut, V, Calafut, V, Gallardo, PA, Vavagiakis, EM, Amodeo, S, Aiola, S, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Bond, JR, Calabrese, E, Choi, SK, Cothard, NF, Devlin, MJ, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dunner, R, Ferraro, S, Guan, Y, Hill, JC, Hilton, GC, Hilton, M, Hložek, R, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Li, Y, Lokken, M, Madhavacheril, M, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, LB, Niemack, MD, Page, LA, Partridge, B, Schaan, E, Schillaci, A, Sifón, C, Spergel, DN, Staggs, ST, Ullom, JN, Vale, LR, Van Engelen, A, Van Lanen, J, Wollack, EJ, and Xu, Z

Abstract

We present a detection of the pairwise kinematic Sunyaev-Zeldovich (kSZ) effect using Atacama Cosmology Telescope (ACT) and Planck CMB observations in combination with Luminous Red Galaxy samples from the Sloan Digital Sky Survey (SDSS) DR15 catalog. Results are obtained using three ACT CMB maps: co-added 150 and 98 GHz maps, combining observations from 2008-2018 (ACT DR5), which overlap with SDSS DR15 over 3,700 sq. deg., and a component-separated map using night-time only observations from 2014-2015 (ACT DR4), overlapping with SDSS DR15 over 2,089 sq. deg. Comparisons of the results from these three maps provide consistency checks in relation to potential frequency-dependent foreground contamination. A total of 343,647 galaxies are used as tracers to identify and locate galaxy groups and clusters from which the kSZ signal is extracted using aperture photometry. We consider the impact of various aperture photometry assumptions and covariance estimation methods on the signal extraction. Theoretical predictions of the pairwise velocities are used to obtain best-fit, mass-averaged, optical depth estimates for each of five luminosity-selected tracer samples. A comparison of the kSZ-derived optical depth measurements obtained here to those derived from the thermal SZ effect for the same sample is presented in a companion paper.

Published
2021

9. Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect

Author

Madhavacheril, MS, Madhavacheril, MS, Hill, JC, Næss, S, Addison, GE, Aiola, S, Baildon, T, Battaglia, N, Bean, R, Bond, JR, Calabrese, E, Calafut, V, Choi, SK, Darwish, O, Datta, R, Devlin, MJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Gluscevic, V, Halpern, M, Han, D, Hasselfield, M, Hilton, M, Hincks, AD, HloŽek, R, Ho, SPP, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Lokken, M, Louis, T, Lungu, M, Macinnis, A, Maurin, L, McMahon, JJ, Moodley, K, Nati, F, Niemack, MD, Page, LA, Partridge, B, Robertson, N, Sehgal, N, Schaan, E, Schillaci, A, Sherwin, BD, Sifón, C, Simon, SM, Spergel, DN, Staggs, ST, Storer, ER, Van Engelen, A, Vavagiakis, EM, Wollack, EJ, Xu, Z, Madhavacheril, MS, Madhavacheril, MS, Hill, JC, Næss, S, Addison, GE, Aiola, S, Baildon, T, Battaglia, N, Bean, R, Bond, JR, Calabrese, E, Calafut, V, Choi, SK, Darwish, O, Datta, R, Devlin, MJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Gluscevic, V, Halpern, M, Han, D, Hasselfield, M, Hilton, M, Hincks, AD, HloŽek, R, Ho, SPP, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Lokken, M, Louis, T, Lungu, M, Macinnis, A, Maurin, L, McMahon, JJ, Moodley, K, Nati, F, Niemack, MD, Page, LA, Partridge, B, Robertson, N, Sehgal, N, Schaan, E, Schillaci, A, Sherwin, BD, Sifón, C, Simon, SM, Spergel, DN, Staggs, ST, Storer, ER, Van Engelen, A, Vavagiakis, EM, Wollack, EJ, and Xu, Z

Abstract

Optimal analyses of many signals in the cosmic microwave background (CMB) require map-level extraction of individual components in the microwave sky, rather than measurements at the power spectrum level alone. To date, nearly all map-level component separation in CMB analyses has been performed exclusively using satellite data. In this paper, we implement a component separation method based on the internal linear combination (ILC) approach which we have designed to optimally account for the anisotropic noise (in the 2D Fourier domain) often found in ground-based CMB experiments. Using this method, we combine multifrequency data from the Planck satellite and the Atacama Cosmology Telescope Polarimeter (ACTPol) to construct the first wide-area (≈2100 sq. deg.), arcminute-resolution component-separated maps of the CMB temperature anisotropy and the thermal Sunyaev-Zel'dovich (tSZ) effect sourced by the inverse-Compton scattering of CMB photons off hot, ionized gas. Our ILC pipeline allows for explicit deprojection of various contaminating signals, including a modified blackbody approximation of the cosmic infrared background (CIB) spectral energy distribution. The cleaned CMB maps will be a useful resource for CMB lensing reconstruction, kinematic SZ cross-correlations, and primordial non-Gaussianity studies. The tSZ maps will be used to study the pressure profiles of galaxies, groups, and clusters through cross-correlations with halo catalogs, with dust contamination controlled via CIB deprojection. The data products described in this paper are available on LAMBDA.

Published
2020

10. The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light

Author

Madhavacheril, MS, Madhavacheril, MS, Sifón, C, Battaglia, N, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Richard Bond, J, Calabrese, E, Choi, SK, Denison, EV, Devlin, MJ, Dicker, SR, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Colin Hill, J, Hilton, GC, Hilton, M, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, van Lanen, J, Lee, E, Louis, T, MacInnis, A, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Niemack, MD, Page, LA, Partridge, B, Qu, FJ, Robertson, NC, Salatino, M, Schaan, E, Schillaci, A, Schmitt, BL, Sehgal, N, Sherwin, BD, Simon, SM, Spergel, DN, Staggs, S, Storer, ER, Ullom, JN, Vale, LR, van Engelen, A, Vavagiakis, EM, Wollack, EJ, Xu, Z, Madhavacheril, MS, Madhavacheril, MS, Sifón, C, Battaglia, N, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Richard Bond, J, Calabrese, E, Choi, SK, Denison, EV, Devlin, MJ, Dicker, SR, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Colin Hill, J, Hilton, GC, Hilton, M, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, van Lanen, J, Lee, E, Louis, T, MacInnis, A, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Niemack, MD, Page, LA, Partridge, B, Qu, FJ, Robertson, NC, Salatino, M, Schaan, E, Schillaci, A, Schmitt, BL, Sehgal, N, Sherwin, BD, Simon, SM, Spergel, DN, Staggs, S, Storer, ER, Ullom, JN, Vale, LR, van Engelen, A, Vavagiakis, EM, Wollack, EJ, and Xu, Z

Abstract

We use gravitational lensing of the cosmic microwave background (CMB) to measure the mass of the most distant blindly selected sample of galaxy clusters on which a lensing measurement has been performed to date. In CMB data from the the Atacama Cosmology Telescope and the Planck satellite, we detect the stacked lensing effect from 677 near-infrared-selected galaxy clusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS), which have a mean redshift of zñ = 1.08. There are currently no representative optical weak lensing measurements of clusters that match the distance and average mass of this sample. We detect the lensing signal with a significance of 4.2s. We model the signal with a halo model framework to find the mean mass of the population from which these clusters are drawn. Assuming that the clusters follow Navarro–Frenk–White (NFW) density profiles, we infer a mean mass of M500cñ = (1.7 + 0.4) ´ 1014 M*. We consider systematic uncertainties from cluster redshift errors, centering errors, and the shape of the NFW profile. These are all smaller than 30% of our reported uncertainty. This work highlights the potential of CMB lensing to enable cosmological constraints from the abundance of distant clusters populating ever larger volumes of the observable universe, beyond the capabilities of optical weak lensing measurements.

Published
2020

11. The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light

Author

Madhavacheril, MS, Madhavacheril, MS, Sifón, C, Battaglia, N, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Richard Bond, J, Calabrese, E, Choi, SK, Denison, EV, Devlin, MJ, Dicker, SR, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Colin Hill, J, Hilton, GC, Hilton, M, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, van Lanen, J, Lee, E, Louis, T, MacInnis, A, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Niemack, MD, Page, LA, Partridge, B, Qu, FJ, Robertson, NC, Salatino, M, Schaan, E, Schillaci, A, Schmitt, BL, Sehgal, N, Sherwin, BD, Simon, SM, Spergel, DN, Staggs, S, Storer, ER, Ullom, JN, Vale, LR, van Engelen, A, Vavagiakis, EM, Wollack, EJ, Xu, Z, Madhavacheril, MS, Madhavacheril, MS, Sifón, C, Battaglia, N, Aiola, S, Amodeo, S, Austermann, JE, Beall, JA, Becker, DT, Richard Bond, J, Calabrese, E, Choi, SK, Denison, EV, Devlin, MJ, Dicker, SR, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Guan, Y, Han, D, Colin Hill, J, Hilton, GC, Hilton, M, Hubmayr, J, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, van Lanen, J, Lee, E, Louis, T, MacInnis, A, McMahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Niemack, MD, Page, LA, Partridge, B, Qu, FJ, Robertson, NC, Salatino, M, Schaan, E, Schillaci, A, Schmitt, BL, Sehgal, N, Sherwin, BD, Simon, SM, Spergel, DN, Staggs, S, Storer, ER, Ullom, JN, Vale, LR, van Engelen, A, Vavagiakis, EM, Wollack, EJ, and Xu, Z

Abstract

We use gravitational lensing of the cosmic microwave background (CMB) to measure the mass of the most distant blindly selected sample of galaxy clusters on which a lensing measurement has been performed to date. In CMB data from the the Atacama Cosmology Telescope and the Planck satellite, we detect the stacked lensing effect from 677 near-infrared-selected galaxy clusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS), which have a mean redshift of zñ = 1.08. There are currently no representative optical weak lensing measurements of clusters that match the distance and average mass of this sample. We detect the lensing signal with a significance of 4.2s. We model the signal with a halo model framework to find the mean mass of the population from which these clusters are drawn. Assuming that the clusters follow Navarro–Frenk–White (NFW) density profiles, we infer a mean mass of M500cñ = (1.7 + 0.4) ´ 1014 M*. We consider systematic uncertainties from cluster redshift errors, centering errors, and the shape of the NFW profile. These are all smaller than 30% of our reported uncertainty. This work highlights the potential of CMB lensing to enable cosmological constraints from the abundance of distant clusters populating ever larger volumes of the observable universe, beyond the capabilities of optical weak lensing measurements.

Published
2020

12. Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect

Author

Madhavacheril, MS, Madhavacheril, MS, Hill, JC, Næss, S, Addison, GE, Aiola, S, Baildon, T, Battaglia, N, Bean, R, Bond, JR, Calabrese, E, Calafut, V, Choi, SK, Darwish, O, Datta, R, Devlin, MJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Gluscevic, V, Halpern, M, Han, D, Hasselfield, M, Hilton, M, Hincks, AD, HloŽek, R, Ho, SPP, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Lokken, M, Louis, T, Lungu, M, Macinnis, A, Maurin, L, McMahon, JJ, Moodley, K, Nati, F, Niemack, MD, Page, LA, Partridge, B, Robertson, N, Sehgal, N, Schaan, E, Schillaci, A, Sherwin, BD, Sifón, C, Simon, SM, Spergel, DN, Staggs, ST, Storer, ER, Van Engelen, A, Vavagiakis, EM, Wollack, EJ, Xu, Z, Madhavacheril, MS, Madhavacheril, MS, Hill, JC, Næss, S, Addison, GE, Aiola, S, Baildon, T, Battaglia, N, Bean, R, Bond, JR, Calabrese, E, Calafut, V, Choi, SK, Darwish, O, Datta, R, Devlin, MJ, Dunkley, J, Dünner, R, Ferraro, S, Gallardo, PA, Gluscevic, V, Halpern, M, Han, D, Hasselfield, M, Hilton, M, Hincks, AD, HloŽek, R, Ho, SPP, Huffenberger, KM, Hughes, JP, Koopman, BJ, Kosowsky, A, Lokken, M, Louis, T, Lungu, M, Macinnis, A, Maurin, L, McMahon, JJ, Moodley, K, Nati, F, Niemack, MD, Page, LA, Partridge, B, Robertson, N, Sehgal, N, Schaan, E, Schillaci, A, Sherwin, BD, Sifón, C, Simon, SM, Spergel, DN, Staggs, ST, Storer, ER, Van Engelen, A, Vavagiakis, EM, Wollack, EJ, and Xu, Z

Abstract

Optimal analyses of many signals in the cosmic microwave background (CMB) require map-level extraction of individual components in the microwave sky, rather than measurements at the power spectrum level alone. To date, nearly all map-level component separation in CMB analyses has been performed exclusively using satellite data. In this paper, we implement a component separation method based on the internal linear combination (ILC) approach which we have designed to optimally account for the anisotropic noise (in the 2D Fourier domain) often found in ground-based CMB experiments. Using this method, we combine multifrequency data from the Planck satellite and the Atacama Cosmology Telescope Polarimeter (ACTPol) to construct the first wide-area (≈2100 sq. deg.), arcminute-resolution component-separated maps of the CMB temperature anisotropy and the thermal Sunyaev-Zel'dovich (tSZ) effect sourced by the inverse-Compton scattering of CMB photons off hot, ionized gas. Our ILC pipeline allows for explicit deprojection of various contaminating signals, including a modified blackbody approximation of the cosmic infrared background (CIB) spectral energy distribution. The cleaned CMB maps will be a useful resource for CMB lensing reconstruction, kinematic SZ cross-correlations, and primordial non-Gaussianity studies. The tSZ maps will be used to study the pressure profiles of galaxies, groups, and clusters through cross-correlations with halo catalogs, with dust contamination controlled via CIB deprojection. The data products described in this paper are available on LAMBDA.

Published
2020

13. Advanced ACTPol TES Device Parameters and Noise Performance in Fielded Arrays

Author

Crowley, K, Austermann, J, Choi, S, Duff, S, Gallardo, P, Ho, S, Hubmayr, J, Koopman, B, Nati, F, Niemack, M, Salatino, M, Simon, S, Staggs, S, Stevens, J, Ullom, J, Vavagiakis, E, Wollack, E, Crowley, KT, Austermann, JE, Choi, SK, Duff, SM, Gallardo, PA, Ho, SPP, Koopman, BJ, Niemack, MD, Simon, SM, Staggs, ST, Stevens, JR, Ullom, JN, Vavagiakis, EM, Wollack, EJ, Crowley, K, Austermann, J, Choi, S, Duff, S, Gallardo, P, Ho, S, Hubmayr, J, Koopman, B, Nati, F, Niemack, M, Salatino, M, Simon, S, Staggs, S, Stevens, J, Ullom, J, Vavagiakis, E, Wollack, E, Crowley, KT, Austermann, JE, Choi, SK, Duff, SM, Gallardo, PA, Ho, SPP, Koopman, BJ, Niemack, MD, Simon, SM, Staggs, ST, Stevens, JR, Ullom, JN, Vavagiakis, EM, and Wollack, EJ

Abstract

The Advanced ACTPol (AdvACT) upgrade to the Atacama Cosmology Telescope (ACT) features arrays of aluminum manganese transition-edge sensors (TESes) optimized for ground-based observations of the cosmic microwave background (CMB). Array testing shows highly responsive detectors with anticipated in-band noise performance under optical loading. We report on TES parameters measured with impedance data taken on a subset of TESes. We then compare modeled noise spectral densities to measurements. We find excess noise at frequencies around 100 Hz, nearly outside of the signal band of CMB measurements. In addition, we describe full-array noise measurements in the laboratory and in the field for two new AdvACT mid-frequency arrays, sensitive at bands centered on 90 and 150 GHz, and data for the high-frequency array (150/230 GHz) as deployed.

Published
2018

14. Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope

Author

Bernardis, FD, Bernardis, FD, Aiola, S, Vavagiakis, EM, Battaglia, N, Niemack, MD, Beall, J, Becker, DT, Bond, JR, Calabrese, E, Cho, H, Coughlin, K, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Fox, A, Gallardo, PA, Halpern, M, Hand, N, Hasselfield, M, Henderson, SW, Hill, JC, Hilton, GC, Hilton, M, Hincks, AD, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, JP, Irwin, KD, Koopman, BJ, Kosowsky, A, Li, D, Louis, T, Lungu, M, Madhavacheril, MS, Maurin, L, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, L, Nibarger, JP, Page, LA, Partridge, B, Schaan, E, Schmitt, BL, Sehgal, N, Sievers, J, Simon, SM, Spergel, DN, Staggs, ST, Stevens, JR, Thornton, RJ, Engelen, AV, Lanen, JV, Wollack, EJ, Bernardis, FD, Bernardis, FD, Aiola, S, Vavagiakis, EM, Battaglia, N, Niemack, MD, Beall, J, Becker, DT, Bond, JR, Calabrese, E, Cho, H, Coughlin, K, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Fox, A, Gallardo, PA, Halpern, M, Hand, N, Hasselfield, M, Henderson, SW, Hill, JC, Hilton, GC, Hilton, M, Hincks, AD, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, JP, Irwin, KD, Koopman, BJ, Kosowsky, A, Li, D, Louis, T, Lungu, M, Madhavacheril, MS, Maurin, L, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, L, Nibarger, JP, Page, LA, Partridge, B, Schaan, E, Schmitt, BL, Sehgal, N, Sievers, J, Simon, SM, Spergel, DN, Staggs, ST, Stevens, JR, Thornton, RJ, Engelen, AV, Lanen, JV, and Wollack, EJ

Abstract

We present a new measurement of the kinematic Sunyaev-Zel'dovich effect using data from the Atacama Cosmology Telescope (ACT) and the Baryon Oscillation Spectroscopic Survey (BOSS). Using 600 square degrees of overlapping sky area, we evaluate the mean pairwise baryon momentum associated with the positions of 50,000 bright galaxies in the BOSS DR11 Large Scale Structure catalog. A non-zero signal arises from the large-scale motions of halos containing the sample galaxies. The data fits an analytical signal model well, with the optical depth to microwave photon scattering as a free parameter determining the overall signal amplitude. We estimate the covariance matrix of the mean pairwise momentum as a function of galaxy separation, using microwave sky simulations, jackknife evaluation, and bootstrap estimates. The most conservative simulation-based errors give signal-to-noise estimates between 3.6 and 4.1 for varying galaxy luminosity cuts. We discuss how the other error determinations can lead to higher signal-to-noise values, and consider the impact of several possible systematic errors. Estimates of the optical depth from the average thermal Sunyaev-Zel'dovich signal at the sample galaxy positions are broadly consistent with those obtained from the mean pairwise momentum signal.

Published
2017

15. Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope

Author

Bernardis, FD, Bernardis, FD, Aiola, S, Vavagiakis, EM, Battaglia, N, Niemack, MD, Beall, J, Becker, DT, Bond, JR, Calabrese, E, Cho, H, Coughlin, K, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Fox, A, Gallardo, PA, Halpern, M, Hand, N, Hasselfield, M, Henderson, SW, Hill, JC, Hilton, GC, Hilton, M, Hincks, AD, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, JP, Irwin, KD, Koopman, BJ, Kosowsky, A, Li, D, Louis, T, Lungu, M, Madhavacheril, MS, Maurin, L, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, L, Nibarger, JP, Page, LA, Partridge, B, Schaan, E, Schmitt, BL, Sehgal, N, Sievers, J, Simon, SM, Spergel, DN, Staggs, ST, Stevens, JR, Thornton, RJ, Engelen, AV, Lanen, JV, Wollack, EJ, Bernardis, FD, Bernardis, FD, Aiola, S, Vavagiakis, EM, Battaglia, N, Niemack, MD, Beall, J, Becker, DT, Bond, JR, Calabrese, E, Cho, H, Coughlin, K, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Fox, A, Gallardo, PA, Halpern, M, Hand, N, Hasselfield, M, Henderson, SW, Hill, JC, Hilton, GC, Hilton, M, Hincks, AD, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, JP, Irwin, KD, Koopman, BJ, Kosowsky, A, Li, D, Louis, T, Lungu, M, Madhavacheril, MS, Maurin, L, McMahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, L, Nibarger, JP, Page, LA, Partridge, B, Schaan, E, Schmitt, BL, Sehgal, N, Sievers, J, Simon, SM, Spergel, DN, Staggs, ST, Stevens, JR, Thornton, RJ, Engelen, AV, Lanen, JV, and Wollack, EJ

Abstract

We present a new measurement of the kinematic Sunyaev-Zel'dovich effect using data from the Atacama Cosmology Telescope (ACT) and the Baryon Oscillation Spectroscopic Survey (BOSS). Using 600 square degrees of overlapping sky area, we evaluate the mean pairwise baryon momentum associated with the positions of 50,000 bright galaxies in the BOSS DR11 Large Scale Structure catalog. A non-zero signal arises from the large-scale motions of halos containing the sample galaxies. The data fits an analytical signal model well, with the optical depth to microwave photon scattering as a free parameter determining the overall signal amplitude. We estimate the covariance matrix of the mean pairwise momentum as a function of galaxy separation, using microwave sky simulations, jackknife evaluation, and bootstrap estimates. The most conservative simulation-based errors give signal-to-noise estimates between 3.6 and 4.1 for varying galaxy luminosity cuts. We discuss how the other error determinations can lead to higher signal-to-noise values, and consider the impact of several possible systematic errors. Estimates of the optical depth from the average thermal Sunyaev-Zel'dovich signal at the sample galaxy positions are broadly consistent with those obtained from the mean pairwise momentum signal.

Published
2017

16. Assembly and integration process of the first high density detector array for the Atacama Cosmology Telescope

Author

Li, Y, Choi, S, Ho, S, Crowley, K, Salatino, M, Simon, S, Staggs, S, Nati, F, Ward, J, Schmitt, B, Henderson, S, Koopman, B, Gallardo, P, Vavagiakis, E, Niemack, M, Mcmahon, J, Duff, S, Schillaci, A, Hubmayr, J, Hilton, G, Beall, J, Wollack, E, Ho, SP, Crowley, KT, Simon, SM, Staggs, ST, Schmitt, BL, Koopman, BJ, Gallardo, PA, Vavagiakis, EM, Niemack, MD, McMahon, J, Duff, SM, Hilton, GC, Beall, JA, Wollack, EJ, Li, Y, Choi, S, Ho, S, Crowley, K, Salatino, M, Simon, S, Staggs, S, Nati, F, Ward, J, Schmitt, B, Henderson, S, Koopman, B, Gallardo, P, Vavagiakis, E, Niemack, M, Mcmahon, J, Duff, S, Schillaci, A, Hubmayr, J, Hilton, G, Beall, J, Wollack, E, Ho, SP, Crowley, KT, Simon, SM, Staggs, ST, Schmitt, BL, Koopman, BJ, Gallardo, PA, Vavagiakis, EM, Niemack, MD, McMahon, J, Duff, SM, Hilton, GC, Beall, JA, and Wollack, EJ

Abstract

The Advanced ACTPol (AdvACT) upgrade on the Atacama Cosmology Telescope (ACT) consists of multichroic Transition Edge Sensor (TES) detector arrays to measure the Cosmic Microwave Background (CMB) polarization anisotropies in multiple frequency bands. The first AdvACT detector array, sensitive to both 150 and 230 GHz, is fabricated on a 150 mm diameter wafer and read out with a completely different scheme compared to ACTPol. Approximately 2000 TES bolometers are packed into the wafer leading to both a much denser detector density and readout circuitry. The demonstration of the assembly and integration of the AdvACT arrays is important for the next generation CMB experiments, which will continue to increase the pixel number and density. We present the detailed assembly process of the first AdvACT detector array.

Published
2016

17. Readout of two-kilopixel transition-edge sensor arrays for Advanced ACTPol

Author

Henderson, S, Stevens, J, Amiri, M, Austermann, J, Beall, J, Chaudhuri, S, Cho, H, Choi, S, Cothard, N, Crowley, K, Duff, S, Fitzgerald, C, Gallardo, P, Halpern, M, Hasselfield, M, Hilton, G, Ho, S, Hubmayr, J, Irwin, K, Koopman, B, Li, D, Li, Y, Mcmahon, J, Nati, F, Niemack, M, Reintsema, C, Salatino, M, Schillaci, A, Schmitt, B, Simon, S, Staggs, S, Vavagiakis, E, Ward, J, Henderson, SW, Stevens, JR, Beall, JA, Cho, HM, Choi, SK, Cothard, NF, Crowley, KT, Duff, SM, Fitzgerald, CP, Gallardo, PA, Ho, SP, Irwin, KD, Koopman, BJ, McMahon, J, Reintsema, CD, Schmitt, BL, Simon, SM, Staggs, ST, Vavagiakis, EM, Ward, JT, Henderson, S, Stevens, J, Amiri, M, Austermann, J, Beall, J, Chaudhuri, S, Cho, H, Choi, S, Cothard, N, Crowley, K, Duff, S, Fitzgerald, C, Gallardo, P, Halpern, M, Hasselfield, M, Hilton, G, Ho, S, Hubmayr, J, Irwin, K, Koopman, B, Li, D, Li, Y, Mcmahon, J, Nati, F, Niemack, M, Reintsema, C, Salatino, M, Schillaci, A, Schmitt, B, Simon, S, Staggs, S, Vavagiakis, E, Ward, J, Henderson, SW, Stevens, JR, Beall, JA, Cho, HM, Choi, SK, Cothard, NF, Crowley, KT, Duff, SM, Fitzgerald, CP, Gallardo, PA, Ho, SP, Irwin, KD, Koopman, BJ, McMahon, J, Reintsema, CD, Schmitt, BL, Simon, SM, Staggs, ST, Vavagiakis, EM, and Ward, JT

Abstract

Advanced ACTPol is an instrument upgrade for the six-meter Atacama Cosmology Telescope (ACT) designed to measure the cosmic microwave background (CMB) temperature and polarization with arcminute-scale angular resolution. To achieve its science goals, Advanced ACTPol utilizes a larger readout multiplexing factor than any previous CMB experiment to measure detector arrays with approximately two thousand transition-edge sensor (TES) bolometers in each 150 mm detector wafer. We present the implementation and testing of the Advanced ACTPol time-division multiplexing readout architecture with a 64-row multiplexing factor. This includes testing of individual multichroic detector pixels and superconducting quantum interference device (SQUID) multiplexing chips as well as testing and optimizing of the integrated readout electronics. In particular, we describe the new automated multiplexing SQUID tuning procedure developed to select and optimize the thousands of SQUID parameters required to readout each Advanced ACTPol array. The multichroic detector pixels in each array use separate channels for each polarization and each of the two frequencies, such that four TESes must be read out per pixel. Challenges addressed include doubling the number of detectors per multiplexed readout channel compared to ACTPol and optimizing the Nyquist inductance to minimize detector and SQUID noise aliasing.

Published
2016

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