The Atacama Cosmology Telescope: a CMB lensing mass map over 2100 square degrees of sky and its cross-correlation with BOSS-CMASS galaxies

Author:

Darwish Omar1ORCID,Madhavacheril Mathew S23,Sherwin Blake D14,Aiola Simone5,Battaglia Nicholas6,Beall James A7,Becker Daniel T7,Bond J Richard8,Calabrese Erminia9,Choi Steve K6,Devlin Mark J10,Dunkley Jo311,Dünner Rolando12,Ferraro Simone13,Fox Anna E7,Gallardo Patricio A14,Guan Yilun15,Halpern Mark16,Han Dongwon17,Hasselfield Matthew5,Hill J Colin51819,Hilton Gene C7,Hilton Matt20,Hincks Adam D8,Patty Ho Shuay-Pwu11,Hubmayr J7,Hughes John P21,Koopman Brian J22,Kosowsky Arthur15,Van Lanen J7,Louis Thibaut23,Lungu Marius11,MacInnis Amanda17,Maurin Loïc24,McMahon Jeffrey25262728,Moodley Kavilan20,Naess Sigurd5,Namikawa Toshiya1,Nati Federico29,Newburgh Laura22,Nibarger John P7,Niemack Michael D614,Page Lyman A11,Partridge Bruce30,Qu Frank J1,Robertson Naomi314,Schillaci Alessandro32,Schmitt Benjamin33,Sehgal Neelima17,Sifón Cristóbal34,Spergel David N35,Staggs Suzanne11,Storer Emilie11,van Engelen Alexander35,Wollack Edward J36

Affiliation:

1. Center for Theoretical Cosmology, DAMTP, University of Cambridge, Cambridge CB3 0WA, UK

2. Perimeter Institute, Centre for the Universe, Waterloo, ON N2L 2Y5, Canada

3. Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA

4. Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge CB3 OHA, UK

5. Center for Computational Astrophysics, Flatiron Institute, 162 5th Avenue, New York, NY 10010, USA

6. Department of Astronomy, Cornell University, Ithaca, NY 14853 USA

7. NIST Quantum Devices Group, 325 Broadway Mailcode 817.03, Boulder, CO 80305, USA

8. Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St George Street, Toronto, ON M5S 3H8, Canada

9. School of Physics and Astronomy, Cardiff University, The Parade, Cardiff CF24 3AA, UK

10. Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104, USA

11. Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544, USA

12. Instituto de Astrofísica and Centro de Astro-Ingeniería, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Chile

13. Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

14. Department of Physics, Cornell University, Ithaca, NY 14853 USA

15. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA

16. Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada

17. Physics and Astronomy Department, Stony Brook University, Stony Brook, NY 11794, USA

18. Department of Physics, Columbia University, 550 West 120th Street, New York, NY 10027, USA

19. School of Natural Sciences, Institute for Advanced Study, Princeton, NJ 08540, USA

20. Astrophysics & Cosmology Research Unit, School of Mathematics, Statistics & Computer Science, University of KwaZulu-Natal, Westville Campus, Durban 4041, South Africa

21. Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019 USA

22. Department of Physics, Yale University, New Haven, CT 06520, USA

23. CNRS/IN2P3, IJCLab, Université Paris-Saclay, F-91405 Orsay, France

24. CNRS, Institut d’astrophysique spatiale, Université Paris-Saclay, F-91405 Orsay, France

25. Kavli Institute for Cosmological Physics, University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637, USA

26. Department of Astronomy and Astrophysics, University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637, USA

27. Department of Physics, University of Chicago, Chicago, IL 60637, USA

28. Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA

29. Department of Physics, University of Milano-Bicocca Piazza della Scienza 3, I-20126 Milano, Italy

30. Department of Physics and Astronomy, Haverford College, Haverford, PA 19041, USA

31. Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK

32. Department of Physics, California Institute of Technology, Pasadena, California 91125, USA

33. Harvard-Smithsonian Center for Astrophysics, Harvard University, 60 Garden St, Cambridge, MA 02138, USA

34. Instituto de Física, Pontificia Universidad Católica de Valparaíso, Casilla 4059, Valparaíso, Chile

35. School of Earth and Space Exploration and Department of Physics, Arizona State University, Tempe, AZ 85287, USA

36. NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA

Abstract

ABSTRACT We construct cosmic microwave background lensing mass maps using data from the 2014 and 2015 seasons of observations with the Atacama Cosmology Telescope (ACT). These maps cover 2100 square degrees of sky and overlap with a wide variety of optical surveys. The maps are signal dominated on large scales and have fidelity such that their correlation with the cosmic infrared background is clearly visible by eye. We also create lensing maps with thermal Sunyaev−Zel’dovich contamination removed using a novel cleaning procedure that only slightly degrades the lensing signal-to-noise ratio. The cross-spectrum between the cleaned lensing map and the BOSS CMASS galaxy sample is detected at 10σ significance, with an amplitude of A = 1.02 ± 0.10 relative to the Planck best-fitting Lambda cold dark matter cosmological model with fiducial linear galaxy bias. Our measurement lays the foundation for lensing cross-correlation science with current ACT data and beyond.

Funder

National Science Foundation

Princeton University

University of Pennsylvania

Canada Foundation for Innovation

Comisión Nacional de Investigación Científica y Tecnológica

NASA

European Research Council

Horizon 2020

STFC

Simons Foundation

W. M. Keck Foundation

National Research Foundation

FONDECYT

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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