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

Yilun Guan; Susan E. Clark; Brandon S. Hensley; Patricio A. Gallardo; Sigurd Naess; Cody J. Duell; Simone Aiola; Zachary Atkins; Erminia Calabrese; Steve K. Choi; Nicholas F. Cothard; Mark Devlin; Adriaan J. Duivenvoorden; Jo Dunkley; Rolando Dünner; Simone Ferraro; Matthew Hasselfield; John P. Hughes; Brian J. Koopman; Arthur B. Kosowsky; Mathew S. Madhavacheril; Jeff McMahon; Federico Nati; Michael D. Niemack; Lyman A. Page; Maria Salatino; Emmanuel Schaan; Neelima Sehgal; Cristóbal Sifón; Suzanne Staggs; Eve M. Vavagiakis; Edward J. Wollack; Zhilei Xu

doi:10.3847/1538-4357/ac133f

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

Yilun Guan, Susan E. Clark, Brandon S. Hensley, Patricio A. Gallardo, Sigurd Naess, Cody J. Duell, Simone Aiola, Zachary Atkins, Erminia Calabrese, Steve K. Choi, Nicholas F. Cothard, Mark Devlin, Adriaan J. Duivenvoorden, Jo Dunkley, Rolando Dünner, Simone Ferraro, Matthew Hasselfield, John P. Hughes, Brian J. Koopman, Arthur B. KosowskyMathew S. Madhavacheril, Jeff McMahon, Federico Nati, Michael D. Niemack, Lyman A. Page, Maria Salatino, Emmanuel Schaan, Neelima Sehgal, Cristóbal Sifón, Suzanne Staggs, Eve M. Vavagiakis, Edward J. Wollack, Zhilei Xu

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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.

Original language	English (US)
Article number	6
Journal	Astrophysical Journal
Volume	920
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/ac133f
State	Published - Oct 10 2021

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/ac133f

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Guan, Y., Clark, S. E., Hensley, B. S., Gallardo, P. A., Naess, S., Duell, C. J., Aiola, S., Atkins, Z., Calabrese, E., Choi, S. K., Cothard, N. F., Devlin, M., Duivenvoorden, A. J., Dunkley, J., Dünner, R., Ferraro, S., Hasselfield, M., Hughes, J. P., Koopman, B. J., ... Xu, Z. (2021). The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center. Astrophysical Journal, 920(1), Article 6. https://doi.org/10.3847/1538-4357/ac133f

@article{e2de6dad65b440a7a8d5baab7603964f,

title = "The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center",

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.",

author = "Yilun Guan and Clark, {Susan E.} and Hensley, {Brandon S.} and Gallardo, {Patricio A.} and Sigurd Naess and Duell, {Cody J.} and Simone Aiola and Zachary Atkins and Erminia Calabrese and Choi, {Steve K.} and Cothard, {Nicholas F.} and Mark Devlin and Duivenvoorden, {Adriaan J.} and Jo Dunkley and Rolando D{\"u}nner and Simone Ferraro and Matthew Hasselfield and Hughes, {John P.} and Koopman, {Brian J.} and Kosowsky, {Arthur B.} and Madhavacheril, {Mathew S.} and Jeff McMahon and Federico Nati and Niemack, {Michael D.} and Page, {Lyman A.} and Maria Salatino and Emmanuel Schaan and Neelima Sehgal and Crist{\'o}bal Sif{\'o}n and Suzanne Staggs and Vavagiakis, {Eve M.} and Wollack, {Edward J.} and Zhilei Xu",

year = "2021",

month = oct,

day = "10",

doi = "10.3847/1538-4357/ac133f",

language = "English (US)",

volume = "920",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

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 2021, 'The Atacama Cosmology Telescope: Microwave Intensity and Polarization Maps of the Galactic Center', Astrophysical Journal, vol. 920, no. 1, 6. https://doi.org/10.3847/1538-4357/ac133f

TY - JOUR

T1 - The Atacama Cosmology Telescope

T2 - Microwave Intensity and Polarization Maps of the Galactic Center

AU - Guan, Yilun

AU - Clark, Susan E.

AU - Hensley, Brandon S.

AU - Gallardo, Patricio A.

AU - Naess, Sigurd

AU - Duell, Cody J.

AU - Aiola, Simone

AU - Atkins, Zachary

AU - Calabrese, Erminia

AU - Choi, Steve K.

AU - Cothard, Nicholas F.

AU - Devlin, Mark

AU - Duivenvoorden, Adriaan J.

AU - Dunkley, Jo

AU - Dünner, Rolando

AU - Ferraro, Simone

AU - Hasselfield, Matthew

AU - Hughes, John P.

AU - Koopman, Brian J.

AU - Kosowsky, Arthur B.

AU - Madhavacheril, Mathew S.

AU - McMahon, Jeff

AU - Nati, Federico

AU - Niemack, Michael D.

AU - Page, Lyman A.

AU - Salatino, Maria

AU - Schaan, Emmanuel

AU - Sehgal, Neelima

AU - Sifón, Cristóbal

AU - Staggs, Suzanne

AU - Vavagiakis, Eve M.

AU - Wollack, Edward J.

AU - Xu, Zhilei

PY - 2021/10/10

Y1 - 2021/10/10

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85117076531&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85117076531&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/ac133f

DO - 10.3847/1538-4357/ac133f

M3 - Article

AN - SCOPUS:85117076531

SN - 0004-637X

VL - 920

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 6

ER -

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

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