The Atacama Cosmology Telescope: Millimeter Observations of a Population of Asteroids or: ACTeroids

John Orlowski-Scherer; Ricco C. Venterea; Nicholas Battaglia; Sigurd Naess; Tanay Bhandarkar; Emily Biermann; Erminia Calabrese; Mark Devlin; Jo Dunkley; Carlos Hervías-Caimapo; Patricio A. Gallardo; Matt Hilton; Adam D. Hincks; Kenda Knowles; Yaqiong Li; Jeffrey J. McMahon; Michael D. Niemack; Lyman A. Page; Bruce Partridge; Maria Salatino; Jonathan Sievers; Cristóbal Sifón; Suzanne Staggs; Alexander van Engelen; Cristian Vargas; Eve M. Vavagiakis; Edward J. Wollack

doi:10.3847/1538-4357/ad21fe

The Atacama Cosmology Telescope: Millimeter Observations of a Population of Asteroids or: ACTeroids

John Orlowski-Scherer, Ricco C. Venterea, Nicholas Battaglia, Sigurd Naess, Tanay Bhandarkar, Emily Biermann, Erminia Calabrese, Mark Devlin, Jo Dunkley, Carlos Hervías-Caimapo, Patricio A. Gallardo, Matt Hilton, Adam D. Hincks, Kenda Knowles, Yaqiong Li, Jeffrey J. McMahon, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Maria SalatinoJonathan Sievers, Cristóbal Sifón, Suzanne Staggs, Alexander van Engelen, Cristian Vargas, Eve M. Vavagiakis, Edward J. Wollack

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Abstract

We present fluxes and light curves for a population of asteroids at millimeter wavelengths, detected by the Atacama Cosmology Telescope (ACT) over 18,000 deg² of the sky using data from 2017 to 2021. We utilize high cadence maps, which can be used in searching for moving objects such as asteroids and trans-Neptunian Objects, as well as for studying transients. We detect 170 asteroids with a signal-to-noise of at least 5 in at least one of the ACT observing bands, which are centered near 90, 150, and 220 GHz. For each asteroid, we compare the ACT measured flux to predicted fluxes from the near-Earth asteroid thermal model fit to WISE data. We confirm previous results that detected a deficit of flux at millimeter wavelengths. Moreover, we report a spectral characteristic to this deficit, such that the flux is relatively lower at 150 and 220 GHz than at 90 GHz. Additionally, we find that the deficit in flux is greater for S-type asteroids than for C-type.

Original language	English (US)
Article number	138
Journal	Astrophysical Journal
Volume	964
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/ad21fe
State	Published - Apr 1 2024

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Orlowski-Scherer, J., Venterea, R. C., Battaglia, N., Naess, S., Bhandarkar, T., Biermann, E., Calabrese, E., Devlin, M., Dunkley, J., Hervías-Caimapo, C., Gallardo, P. A., Hilton, M., Hincks, A. D., Knowles, K., Li, Y., McMahon, J. J., Niemack, M. D., Page, L. A., Partridge, B., ... Wollack, E. J. (2024). The Atacama Cosmology Telescope: Millimeter Observations of a Population of Asteroids or: ACTeroids. Astrophysical Journal, 964(2), Article 138. https://doi.org/10.3847/1538-4357/ad21fe

@article{deb04f502c1c486cb9e692893fa84705,

title = "The Atacama Cosmology Telescope: Millimeter Observations of a Population of Asteroids or: ACTeroids",

abstract = "We present fluxes and light curves for a population of asteroids at millimeter wavelengths, detected by the Atacama Cosmology Telescope (ACT) over 18,000 deg2 of the sky using data from 2017 to 2021. We utilize high cadence maps, which can be used in searching for moving objects such as asteroids and trans-Neptunian Objects, as well as for studying transients. We detect 170 asteroids with a signal-to-noise of at least 5 in at least one of the ACT observing bands, which are centered near 90, 150, and 220 GHz. For each asteroid, we compare the ACT measured flux to predicted fluxes from the near-Earth asteroid thermal model fit to WISE data. We confirm previous results that detected a deficit of flux at millimeter wavelengths. Moreover, we report a spectral characteristic to this deficit, such that the flux is relatively lower at 150 and 220 GHz than at 90 GHz. Additionally, we find that the deficit in flux is greater for S-type asteroids than for C-type.",

author = "John Orlowski-Scherer and Venterea, {Ricco C.} and Nicholas Battaglia and Sigurd Naess and Tanay Bhandarkar and Emily Biermann and Erminia Calabrese and Mark Devlin and Jo Dunkley and Carlos Herv{\'i}as-Caimapo and Gallardo, {Patricio A.} and Matt Hilton and Hincks, {Adam D.} and Kenda Knowles and Yaqiong Li and McMahon, {Jeffrey J.} and Niemack, {Michael D.} and Page, {Lyman A.} and Bruce Partridge and Maria Salatino and Jonathan Sievers and Crist{\'o}bal Sif{\'o}n and Suzanne Staggs and {van Engelen}, Alexander and Cristian Vargas and Vavagiakis, {Eve M.} and Wollack, {Edward J.}",

note = "Publisher Copyright: {\textcopyright} 2024. The Author(s). Published by the American Astronomical Society.",

year = "2024",

month = apr,

day = "1",

doi = "10.3847/1538-4357/ad21fe",

language = "English (US)",

volume = "964",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

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Orlowski-Scherer, J, Venterea, RC, Battaglia, N, Naess, S, Bhandarkar, T, Biermann, E, Calabrese, E, Devlin, M, Dunkley, J, Hervías-Caimapo, C, Gallardo, PA, Hilton, M, Hincks, AD, Knowles, K, Li, Y, McMahon, JJ, Niemack, MD, Page, LA, Partridge, B, Salatino, M, Sievers, J, Sifón, C, Staggs, S, van Engelen, A, Vargas, C, Vavagiakis, EM & Wollack, EJ 2024, 'The Atacama Cosmology Telescope: Millimeter Observations of a Population of Asteroids or: ACTeroids', Astrophysical Journal, vol. 964, no. 2, 138. https://doi.org/10.3847/1538-4357/ad21fe

TY - JOUR

T1 - The Atacama Cosmology Telescope

T2 - Millimeter Observations of a Population of Asteroids or: ACTeroids

AU - Orlowski-Scherer, John

AU - Venterea, Ricco C.

AU - Battaglia, Nicholas

AU - Naess, Sigurd

AU - Bhandarkar, Tanay

AU - Biermann, Emily

AU - Calabrese, Erminia

AU - Devlin, Mark

AU - Dunkley, Jo

AU - Hervías-Caimapo, Carlos

AU - Gallardo, Patricio A.

AU - Hilton, Matt

AU - Hincks, Adam D.

AU - Knowles, Kenda

AU - Li, Yaqiong

AU - McMahon, Jeffrey J.

AU - Niemack, Michael D.

AU - Page, Lyman A.

AU - Partridge, Bruce

AU - Salatino, Maria

AU - Sievers, Jonathan

AU - Sifón, Cristóbal

AU - Staggs, Suzanne

AU - van Engelen, Alexander

AU - Vargas, Cristian

AU - Vavagiakis, Eve M.

AU - Wollack, Edward J.

PY - 2024/4/1

Y1 - 2024/4/1

N2 - We present fluxes and light curves for a population of asteroids at millimeter wavelengths, detected by the Atacama Cosmology Telescope (ACT) over 18,000 deg2 of the sky using data from 2017 to 2021. We utilize high cadence maps, which can be used in searching for moving objects such as asteroids and trans-Neptunian Objects, as well as for studying transients. We detect 170 asteroids with a signal-to-noise of at least 5 in at least one of the ACT observing bands, which are centered near 90, 150, and 220 GHz. For each asteroid, we compare the ACT measured flux to predicted fluxes from the near-Earth asteroid thermal model fit to WISE data. We confirm previous results that detected a deficit of flux at millimeter wavelengths. Moreover, we report a spectral characteristic to this deficit, such that the flux is relatively lower at 150 and 220 GHz than at 90 GHz. Additionally, we find that the deficit in flux is greater for S-type asteroids than for C-type.

AB - We present fluxes and light curves for a population of asteroids at millimeter wavelengths, detected by the Atacama Cosmology Telescope (ACT) over 18,000 deg2 of the sky using data from 2017 to 2021. We utilize high cadence maps, which can be used in searching for moving objects such as asteroids and trans-Neptunian Objects, as well as for studying transients. We detect 170 asteroids with a signal-to-noise of at least 5 in at least one of the ACT observing bands, which are centered near 90, 150, and 220 GHz. For each asteroid, we compare the ACT measured flux to predicted fluxes from the near-Earth asteroid thermal model fit to WISE data. We confirm previous results that detected a deficit of flux at millimeter wavelengths. Moreover, we report a spectral characteristic to this deficit, such that the flux is relatively lower at 150 and 220 GHz than at 90 GHz. Additionally, we find that the deficit in flux is greater for S-type asteroids than for C-type.

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UR - http://www.scopus.com/inward/citedby.url?scp=85188908367&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/ad21fe

DO - 10.3847/1538-4357/ad21fe

M3 - Article

AN - SCOPUS:85188908367

SN - 0004-637X

VL - 964

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 138

ER -

The Atacama Cosmology Telescope: Millimeter Observations of a Population of Asteroids or: ACTeroids

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