Discovery of 34 Low-mass Comoving Systems Using NOIRLab Source Catalog DR2

Kiwy, Frank; Faherty, Jacqueline K.; Meisner, Aaron M.; Schneider, Adam C.; Kirkpatrick, J. Davy; Kuchner, Marc J.; Burgasser, Adam J.; Casewell, Sarah L.; Kiman, Rocio; Calamari, Emily; Aganze, Christian; Hsu, Chih-Chun; Sainio, Arttu; Thakur, Vinod

doi:10.3847/1538-3881/ac68e7

Cited by 6 publications

(8 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This could result from a limitation of the cloud-free Sonora Cholla models, as any clouds, or differences in the molecular absorption from the models, would significantly change the shape of the SED. While the source could be a binary brown dwarf system (see Burgasser et al 2003bBurgasser et al , 2006Cruz et al 2004;Dupuy et al 2015;Kiwy et al 2022;Calissendorff et al 2023, for examples in the literature), this may not significantly effect the observed colors.…”

Section: Jades-gs-bd-5mentioning

confidence: 99%

Brown Dwarf Candidates in the JADES and CEERS Extragalactic Surveys

Hainline,

Helton,

Johnson

et al. 2024

ApJ

View full text Add to dashboard Cite

By combining the James Webb Space Telescope (JWST)/NIRCam JADES and CEERS extragalactic data sets, we have uncovered a sample of 21 T and Y brown dwarf candidates at best-fit distances between 0.1 and 4.2 kpc. These sources were selected by targeting the blue 1–2.5 μm colors and red 3–4.5 μm colors that arise from molecular absorption in the atmospheres of T eff < 1300 K brown dwarfs. We fit these sources using multiple models of substellar atmospheres and present the resulting fluxes, sizes, effective temperatures, and other derived properties for the sample. If confirmed, these fits place the majority of the sources in the Milky Way thick disk and halo. We observe proper motions for seven of the candidate brown dwarfs, with directions in agreement with the plane of our Galaxy, providing evidence that they are not extragalactic in nature. We demonstrate how the colors of these sources differ from selected high-redshift galaxies, and explore the selection of these sources in planned large-area JWST NIRCam surveys. Deep imaging with JWST/NIRCam presents an an excellent opportunity for finding and understanding these ultracool dwarfs at kiloparsec distances.

show abstract

Section: Jades-gs-bd-5mentioning

confidence: 99%

Brown Dwarf Candidates in the JADES and CEERS Extragalactic Surveys

Hainline,

Helton,

Johnson

et al. 2024

ApJ

View full text Add to dashboard Cite

show abstract

“…With these caveats in mind, we compared our systems with stellar binaries and exoplanetary systems from the literature. Stellar binaries are taken from El-Badry et al (2021), complemented with the list of low-mass systems compiled by Faherty et al (2020) and Kiwy et al (2022). Exoplanetary systems are taken from the NASA Exoplanet Archive.…”

Section: Sample Propertiesmentioning

confidence: 99%

Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE

Marocco,

Kirkpatrick,

Schneider

et al. 2024

ApJ

Self Cite

View full text Add to dashboard Cite

We present the discovery of 13 new widely separated T dwarf companions to M dwarf primaries, identified using Wide-field Infrared Survey Explorer/NEOWISE data by the CatWISE and Backyard Worlds: Planet 9 projects (hereafter BYW). This sample represents an ∼60% increase in the number of known M + T systems, and allows us to probe the most extreme products of binary/planetary system formation, a discovery space made available by the CatWISE2020 catalog and the BYW effort. Highlights among the sample are WISEP J075108.79-763449.6, a previously known T9 thought to be old due to its spectral energy distribution, which was found by Zhang et al. (2021b) to be part of a common proper motion pair with L34-26 A, a well-studied young M3 V star within 10 pc of the Sun; CWISE J054129.32-745021.5 B and 2MASS J05581644-4501559 B, two T8 dwarfs possibly associated with the very fast-rotating M4 V stars CWISE J054129.32745021.5 A and 2MASS J05581644-4501559 A; and UCAC3 52-1038 B, which is among the widest late-T companions to main-sequence stars, with a projected separation of ∼7100 au. The new benchmarks presented here are prime JWST targets, and can help us place strong constraints on the formation and evolution theory of substellar objects as well as on atmospheric models for these cold exoplanet analogs.

show abstract

“…Our initial list of candidates for the creation of this sample was the UltracoolSheet, 5 a public compilation of ultracool dwarfs (e.g., spectral types later than ∼M6) and directly imaged exoplanets compiled in Best et al (2020). To this list, we added several papers with spectroscopically classified L, T, or Y dwarfs that were either not included (Robert et al 2016;Kellogg et al 2017;Kuchner et al 2017;Pérez-Garrido et al 2017, 2018Schneider et al 2017;Greco et al 2019;Kiman et al 2019;Zhang et al 2019) or published after the creation of the UltracoolSheet in 2020 (Faherty et al 2020(Faherty et al , 2021Meisner et al 2020bMeisner et al , 2021Schneider et al 2020Schneider et al , 2022Zhang et al 2020;Marocco et al 2021;Kirkpatrick et al 2021;Kiwy et al 2022;Softich et al 2022;Vos et al 2022).…”

Section: Sample Selectionmentioning

confidence: 99%

Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey

Schneider

Munn

Vrba

et al. 2023

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Discovery of 34 Low-mass Comoving Systems Using NOIRLab Source Catalog DR2

Cited by 6 publications

References 76 publications

Brown Dwarf Candidates in the JADES and CEERS Extragalactic Surveys

Brown Dwarf Candidates in the JADES and CEERS Extragalactic Surveys

Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE

Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey

Contact Info

Product

Resources

About