Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey
We present the positions, proper motions, and near-infrared photometry for 966 known objects with spectral types later than M that were observed as part of the the UKIRT Hemisphere Survey (UHS). We augment the photometry and astrometry from UHS with information from Gaia DR3, Pan-STARRS DR2, and Cat...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astronomical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-3881/ace9bf |
| _version_ | 1797697110225715200 |
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| author | Adam C. Schneider Jeffrey A. Munn Frederick J. Vrba Justice Bruursema Scott E. Dahm Stephen J. Williams Michael C. Liu Bryan N. Dorland |
| author_facet | Adam C. Schneider Jeffrey A. Munn Frederick J. Vrba Justice Bruursema Scott E. Dahm Stephen J. Williams Michael C. Liu Bryan N. Dorland |
| author_sort | Adam C. Schneider |
| collection | DOAJ |
| description | We present the positions, proper motions, and near-infrared photometry for 966 known objects with spectral types later than M that were observed as part of the the UKIRT Hemisphere Survey (UHS). We augment the photometry and astrometry from UHS with information from Gaia DR3, Pan-STARRS DR2, and CatWISE 2020 to produce a database of homogeneous photometry and astrometry for this sample. The multi-epoch survey strategy of UHS allows us to determine the proper motions for most sources, with a median proper motion uncertainty of ∼3.6 mas yr ^−1 . Our UHS proper motion measurements are generally in good agreement with those from Gaia DR3, Pan-STARRS, and CatWISE 2020, with UHS proper motions typically more precise than those from CatWISE 2020 and Pan-STARRS but not Gaia DR3. We critically analyze the publicly available spectra for 406 members of this sample and provide updated near-infrared spectral types for ∼100 objects. We determine typical colors as a function of spectral type and provide absolute magnitude versus spectral type relations for UHS J - and K -band photometry. Using newly determined proper motions, we highlight several objects of interest, such as objects with large tangential velocities, widely separated co-moving companions, and potential members of young nearby associations. |
| first_indexed | 2024-03-12T03:35:36Z |
| format | Article |
| id | doaj.art-4786891e36054da08b264823e41eff76 |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-12T03:35:36Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-4786891e36054da08b264823e41eff762023-09-03T13:13:35ZengIOP PublishingThe Astronomical Journal1538-38812023-01-01166310310.3847/1538-3881/ace9bfAstrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere SurveyAdam C. Schneider0https://orcid.org/0000-0002-6294-5937Jeffrey A. Munn1https://orcid.org/0000-0002-4603-4834Frederick J. Vrba2Justice Bruursema3https://orcid.org/0000-0002-3858-1205Scott E. Dahm4https://orcid.org/0000-0002-2968-2418Stephen J. Williams5Michael C. Liu6https://orcid.org/0000-0003-2232-7664Bryan N. Dorland7https://orcid.org/0000-0002-5604-5254United States Naval Observatory , Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86005, USA ; adam.c.schneider4.civ@us.navy.milUnited States Naval Observatory , Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86005, USA ; adam.c.schneider4.civ@us.navy.milUnited States Naval Observatory , Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86005, USA ; adam.c.schneider4.civ@us.navy.milUnited States Naval Observatory , Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86005, USA ; adam.c.schneider4.civ@us.navy.milGemini Observatory/NSF's NOIRLab , 950 North Cherry Avenue, Tucson, AZ 85719, USAUnited States Naval Observatory , Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86005, USA ; adam.c.schneider4.civ@us.navy.milInstitute for Astronomy, University of Hawaii at Manoa , Honolulu, HI 96822, USAUnited States Naval Observatory , 3450 Massachusetts Avenue Northwest, Washington, DC 20392-5420, USAWe present the positions, proper motions, and near-infrared photometry for 966 known objects with spectral types later than M that were observed as part of the the UKIRT Hemisphere Survey (UHS). We augment the photometry and astrometry from UHS with information from Gaia DR3, Pan-STARRS DR2, and CatWISE 2020 to produce a database of homogeneous photometry and astrometry for this sample. The multi-epoch survey strategy of UHS allows us to determine the proper motions for most sources, with a median proper motion uncertainty of ∼3.6 mas yr ^−1 . Our UHS proper motion measurements are generally in good agreement with those from Gaia DR3, Pan-STARRS, and CatWISE 2020, with UHS proper motions typically more precise than those from CatWISE 2020 and Pan-STARRS but not Gaia DR3. We critically analyze the publicly available spectra for 406 members of this sample and provide updated near-infrared spectral types for ∼100 objects. We determine typical colors as a function of spectral type and provide absolute magnitude versus spectral type relations for UHS J - and K -band photometry. Using newly determined proper motions, we highlight several objects of interest, such as objects with large tangential velocities, widely separated co-moving companions, and potential members of young nearby associations.https://doi.org/10.3847/1538-3881/ace9bfBrown dwarfsL dwarfsT dwarfsY dwarfsLow mass stars |
| spellingShingle | Adam C. Schneider Jeffrey A. Munn Frederick J. Vrba Justice Bruursema Scott E. Dahm Stephen J. Williams Michael C. Liu Bryan N. Dorland Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey The Astronomical Journal Brown dwarfs L dwarfs T dwarfs Y dwarfs Low mass stars |
| title | Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey |
| title_full | Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey |
| title_fullStr | Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey |
| title_full_unstemmed | Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey |
| title_short | Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey |
| title_sort | astrometry and photometry for ≈1000 l t and y dwarfs from the ukirt hemisphere survey |
| topic | Brown dwarfs L dwarfs T dwarfs Y dwarfs Low mass stars |
| url | https://doi.org/10.3847/1538-3881/ace9bf |
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