Ultracool dwarfs candidates based on 6 yr of the Dark Energy Survey data

dal Ponte, M.; Santiago, B.; Carnero Rosell, A.; De Paris, L.; Pace, A. B.; Bechtol, K.; Abbott, T. M. C.; Aguena, M.; Allam, S.; Alves, O.; Bacon, D.; Bertin, E.; Bocquet, S.; Brooks, D.; Burke, D. L.; Kind, M. Carrasco; Carretero, J.; Conselice, C.; Costanzi, M.; Desai, S.; De Vicente, J.; Doel, P.; Everett, S.; Ferrero, I.; Flaugher, B.; Frieman, J.; García-Bellido, J.; Gerdes, D. W.; Gruendl, R. A.; Gruen, D.; Gutierrez, G.; Hinton, S. R.; Hollowood, D. L.; James, D. J.; Kuehn, K.; Kuropatkin, N.; Marshall, J. L.; Mena-Fernández, J.; Menanteau, F.; Miquel, R.; Ogando, R. L. C.; Palmese, A.; Paz-Chinchón, F.; Pereira, M. E. S.; Plazas Malagón, A. A.; Pieres, A.; Raveri, M.; Rodriguez-Monroy, M.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Sevilla-Noarbe, I.; Smith, M.; Soares-Santos, M.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Thomas, D.; To, C.; Weaverdyck, N.

doi:10.1093/mnras/stad955

Title: Ultracool dwarfs candidates based on 6 yr of the Dark Energy Survey data

Journal Article · 29 March 2023 · Monthly Notices of the Royal Astronomical Society

DOI: https://doi.org/10.1093/mnras/stad955 · OSTI ID:1971290

; Santiago, B.;

; De Paris, L.;

; Bechtol, K.; Abbott, T. M. C.; Aguena, M.; Allam, S.; Alves, O.; Bacon, D.; Bertin, E.; Bocquet, S.; Brooks, D.; Burke, D. L.; Kind, M. Carrasco; Carretero, J.; Conselice, C.; Costanzi, M.; Desai, S. more »

ABSTRACT We present a sample of 19 583 ultracool dwarf candidates brighter than z ≤23 selected from the Dark Energy Survey DR2 coadd data matched to VHS DR6, VIKING DR5, and AllWISE covering ∼ 480 deg2. The ultracool candidates were first pre-selected based on their (i–z), (z–Y), and (Y–J) colours. They were further classified using a method that compares their optical, near-infrared, and mid-infrared colours against templates of M, L, and T dwarfs. 14 099 objects are presented as new L and T candidates and the remaining objects are from the literature, including 5342 candidates from our previous work. Using this new and deeper sample of ultracool dwarf candidates we also present: 20 new candidate members to nearby young moving groups and associations, variable candidate sources and four new wide binary systems composed of two ultracool dwarfs. Finally, we also show the spectra of 12 new ultracool dwarfs discovered by our group and presented here for the first time. These spectroscopically confirmed objects are a sanity check of our selection of ultracool dwarfs and photometric classification method.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); University of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: DES Collaboration

Grant/Contract Number:: AC02-07CH11359; AC05-00OR22725; SC0019193

OSTI ID:: 1971290

Report Number(s):: FERMILAB-PUB--22-837-PPD; arXiv:2303.15156

Journal Information:: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 2 Vol. 522; ISSN 0035-8711

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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79 ASTRONOMY AND ASTROPHYSICS
brown dwarfs
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low-mass stars
stars
surveys

Title: Ultracool dwarfs candidates based on 6 yr of the Dark Energy Survey data

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