BD+29 5007 is a K-type star, located 77 light-years in the constellation Pegasus.[1] It has a large-separation companion that was identified in 2016.[2] The pair was identified to be a possible member of the 45+15
−5 million years old Argus association (see IC 2391),[3] though this is disputed.[4]
Properties
editThe star has a mass of 0.671±0.021 M☉, a radius of 0.703±0.021 R☉ and a temperature of 4327±144 Kelvin.[5] It has a spectral type of K5V.[1]
Companion
editThe companion is 2MASS J23512200+3010540 (short: 2MASS J2351+3010) that was discovered in 2010[6] and first identified as a possibly young low-mass object in 2014 by the BANYAN II survey. The authors find a L5.5 dwarf with red near-infrared colors. If it is a member of Argus, it should have a mass of 9−11 MJ, according to the authors.[7] However, the BANYAN VII survey in 2015 revised the status of 2MASS J2351+3010 to a field object, i.e. not a member of any stellar cluster or association.[4] This is also suggested by measured surface gravity of 2MASS J2351+3010, consistent with that of a field object.[8][9] This would mean that the companion is too massive to have a planetary mass (i.e. its mass is larger than 13 MJ).[9]
In 2016 it was identified as a possible companion to BD+29 5007.[2] In 2024 it was again identified as an Argus member with a mass of 11.9+0.4
−0.2 MJ. The same authors calculate that this system has a probability of 1.71% to be a false-positive match.[3][1] The companion is separated by 935 arcseconds, which translates into 22,100 astronomical units at this distance.[1] This high separation is larger than the 12,000 AU projected separation of Gliese 900 b,[10] currently the planetary-mass object with the longest known orbit, and is similar to brown dwarfs such as UCAC4 328-061594.[11]
See also
editReferences
edit- ^ a b c d Baig, Sayan (2024-08-13). "The Ultracool Dwarf Companion catalouge". Zenodo. doi:10.5281/zenodo.13312178.
- ^ a b Kirkpatrick, J. Davy; Kellogg, Kendra; Schneider, Adam C.; Fajardo-Acosta, Sergio; Cushing, Michael C.; Greco, Jennifer; Mace, Gregory N.; Gelino, Christopher R.; Wright, Edward L.; Eisenhardt, Peter R. M.; Stern, Daniel; Faherty, Jacqueline K.; Sheppard, Scott S.; Lansbury, George B.; Logsdon, Sarah E. (2016-06-01). "The AllWISE Motion Survey, Part 2". The Astrophysical Journal Supplement Series. 224 (2): 36. arXiv:1603.08040. Bibcode:2016ApJS..224...36K. doi:10.3847/0067-0049/224/2/36. ISSN 0067-0049.
- ^ a b Baig, Sayan; Smart, R. L.; Jones, Hugh R. A.; Gagné, Jonathan; Pinfield, D. J.; Cheng, Gemma; Moranta, Leslie (2024-08-13). "The Gaia Ultracool Dwarf Sample -- V: The Ultracool Dwarf Companion catalogue". Pre-print. 533 (4): 3784. arXiv:2408.07024. Bibcode:2024MNRAS.533.3784B. doi:10.1093/mnras/stae2005.
- ^ a b Gagné, Jonathan; Faherty, Jacqueline K.; Cruz, Kelle L.; Lafreniére, David; Doyon, René; Malo, Lison; Burgasser, Adam J.; Naud, Marie-Eve; Artigau, Étienne; Bouchard, Sandie; Gizis, John E.; Albert, Loïc (2015-08-01). "BANYAN. VII. A New Population of Young Substellar Candidate Members of Nearby Moving Groups from the BASS Survey". The Astrophysical Journal Supplement Series. 219 (2): 33. arXiv:1506.07712. Bibcode:2015ApJS..219...33G. doi:10.1088/0067-0049/219/2/33. ISSN 0067-0049. Database entry at VizieR.
- ^ Hardegree-Ullman, Kevin K.; Apai, Dániel; Bergsten, Galen J.; Pascucci, Ilaria; López-Morales, Mercedes (2023-06-01). "Bioverse: A Comprehensive Assessment of the Capabilities of Extremely Large Telescopes to Probe Earth-like O2 Levels in Nearby Transiting Habitable-zone Exoplanets". The Astronomical Journal. 165 (6): 267. arXiv:2304.12490. Bibcode:2023AJ....165..267H. doi:10.3847/1538-3881/acd1ec. ISSN 0004-6256.
- ^ Kirkpatrick, J. Davy; Looper, Dagny L.; Burgasser, Adam J.; Schurr, Steven D.; Cutri, Roc M.; Cushing, Michael C.; Cruz, Kelle L.; Sweet, Anne C.; Knapp, Gillian R.; Barman, Travis S.; Bochanski, John J.; Roellig, Thomas L.; McLean, Ian S.; McGovern, Mark R.; Rice, Emily L. (2010-09-01). "Discoveries from a Near-infrared Proper Motion Survey Using Multi-epoch Two Micron All-Sky Survey Data". The Astrophysical Journal Supplement Series. 190 (1): 100–146. arXiv:1008.3591. Bibcode:2010ApJS..190..100K. doi:10.1088/0067-0049/190/1/100. ISSN 0067-0049.
- ^ Gagné, Jonathan; Lafrenière, David; Doyon, René; Malo, Lison; Artigau, Étienne (2014-03-01). "BANYAN. II. Very Low Mass and Substellar Candidate Members to Nearby, Young Kinematic Groups with Previously Known Signs of Youth". The Astrophysical Journal. 783 (2): 121. arXiv:1312.5864. Bibcode:2014ApJ...783..121G. doi:10.1088/0004-637X/783/2/121. ISSN 0004-637X.
- ^ Martin, Emily C.; Mace, Gregory N.; McLean, Ian S.; Logsdon, Sarah E.; Rice, Emily L.; Kirkpatrick, J. Davy; Burgasser, Adam J.; McGovern, Mark R.; Prato, Lisa (2017-03-01). "Surface Gravities for 228 M, L, and T Dwarfs in the NIRSPEC Brown Dwarf Spectroscopic Survey". The Astrophysical Journal. 838 (1): 73. arXiv:1703.03811. Bibcode:2017ApJ...838...73M. doi:10.3847/1538-4357/aa6338. ISSN 0004-637X.
- ^ a b Liu, Michael C.; Dupuy, Trent J.; Allers, Katelyn N. (2016-12-01). "The Hawaii Infrared Parallax Program. II. Young Ultracool Field Dwarfs". The Astrophysical Journal. 833 (1): 96. arXiv:1612.02426. Bibcode:2016ApJ...833...96L. doi:10.3847/1538-4357/833/1/96. ISSN 0004-637X.
- ^ Rothermich, Austin; Faherty, Jacqueline K.; Bardalez-Gagliuffi, Daniella; Schneider, Adam C.; Kirkpatrick, J. Davy; Meisner, Aaron M.; Burgasser, Adam J.; Kuchner, Marc; Allers, Katelyn; Gagné, Jonathan; Caselden, Dan; Calamari, Emily; Popinchalk, Mark; Suárez, Genaro; Gerasimov, Roman (2024-06-01). "89 New Ultracool Dwarf Comoving Companions Identified with the Backyard Worlds: Planet 9 Citizen Science Project". The Astronomical Journal. 167 (6): 253. arXiv:2403.04592. Bibcode:2024AJ....167..253R. doi:10.3847/1538-3881/ad324e. ISSN 0004-6256.
- ^ "Planetary Systems". NASA Exoplanet Archive. Retrieved October 9, 2024.
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