Astronomy:BD+29 5007

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Short description: Star in the constellation Pegasus
BD+29 5007
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BD+29 5007 and its companion
Observation data
Equinox J2000.0]] (ICRS)
Constellation Pegasus
Right ascension  23h 50m 27.862s[1]
Declination +30° 21′ 11.73″[1]
Apparent magnitude (V) 9.35[2]
Characteristics
Spectral type K5V[3]
B−V color index 1.226±0.024[2]
Astrometry
Radial velocity (Rv)−3.77±0.19[2] km/s
Proper motion (μ) RA: 255.381 mas/yr
Dec.: 10.628 mas/yr
Parallax (π)42.2919 ± 0.0166[1] mas
Distance77.12 ± 0.03 ly
(23.645 ± 0.009 pc)
Absolute magnitude (MV)7.46[2]
Details[4]
Mass0.671±0.021 M☉
Radius0.703±0.021 R☉
Luminosity0.160±0.004 L☉
Temperature4,327±144 K
Other designations
BD+29°5007, GJ 9841, HIP 117559, SAO 73544, PPM 89170[5]
Database references
SIMBADdata

BD+29 5007 is a K-type star, located 77 light-years away in the constellation Pegasus.[3] It has a large-separation companion that was identified in 2016.[6] The pair was identified to be a possible member of the 45+15
−5 million years old Argus association (see IC 2391),[7] though this is disputed.[8]

Properties

The 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.[4] It has a spectral type of K5V.[3]

Companion

The companion is 2MASS J23512200+3010540 (short: 2MASS J2351+3010) that was discovered in 2010[9] 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 |♃|J}}}}}}, according to the authors.[10] 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.[8] This is also suggested by measured surface gravity of 2MASS J2351+3010, consistent with that of a field object.[11][12] This would mean that the companion is too massive to have a planetary mass (i.e. its mass is larger than 13 MJ).[12]

In 2016 it was identified as a possible companion to BD+29 5007.[6] 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.[7][3] The companion is separated by 935 arcseconds, which translates into 22,100 astronomical units at this distance.[3] This high separation is larger than the 12,000 AU projected separation of Gliese 900 b,[13] currently the planetary-mass object with the longest known orbit, and is similar to brown dwarfs such as UCAC4 328-061594.[14]

See also

References

  1. ↑ 1.0 1.1 1.2 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Baig, Sayan (2024-08-13). "The Ultracool Dwarf Companion catalouge". Zenodo. doi:10.5281/zenodo.13312178. https://zenodo.org/records/13312178. 
  4. ↑ 4.0 4.1 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. doi:10.3847/1538-3881/acd1ec. ISSN 0004-6256. Bibcode: 2023AJ....165..267H. 
  5. ↑ "BD+29 5007". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BD%2B29+5007. 
  6. ↑ 6.0 6.1 Kirkpatrick, J. Davy; Kellogg, Kendra; Schneider, Adam C.; Fajardo-Acosta, Sergio; Cushing, Michael C.; Greco, Jennifer; Mace, Gregory N.; Gelino, Christopher R. et al. (2016-06-01). "The AllWISE Motion Survey, Part 2". The Astrophysical Journal Supplement Series 224 (2): 36. doi:10.3847/0067-0049/224/2/36. ISSN 0067-0049. Bibcode: 2016ApJS..224...36K. 
  7. ↑ 7.0 7.1 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. doi:10.1093/mnras/stae2005. Bibcode: 2024MNRAS.533.3784B. 
  8. ↑ 8.0 8.1 Gagné, Jonathan; Faherty, Jacqueline K.; Cruz, Kelle L.; Lafreniére, David; Doyon, René; Malo, Lison; Burgasser, Adam J.; Naud, Marie-Eve et al. (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. doi:10.1088/0067-0049/219/2/33. ISSN 0067-0049. Bibcode: 2015ApJS..219...33G. https://ui.adsabs.harvard.edu/abs/2015ApJS..219...33G.  Database entry at VizieR.
  9. ↑ Kirkpatrick, J. Davy; Looper, Dagny L.; Burgasser, Adam J.; Schurr, Steven D.; Cutri, Roc M.; Cushing, Michael C.; Cruz, Kelle L.; Sweet, Anne C. et al. (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. doi:10.1088/0067-0049/190/1/100. ISSN 0067-0049. Bibcode: 2010ApJS..190..100K. https://ui.adsabs.harvard.edu/abs/2010ApJS..190..100K. 
  10. ↑ 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. doi:10.1088/0004-637X/783/2/121. ISSN 0004-637X. Bibcode: 2014ApJ...783..121G. https://ui.adsabs.harvard.edu/abs/2014ApJ...783..121G. 
  11. ↑ Martin, Emily C.; Mace, Gregory N.; McLean, Ian S.; Logsdon, Sarah E.; Rice, Emily L.; Kirkpatrick, J. Davy; Burgasser, Adam J.; McGovern, Mark R. et al. (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. doi:10.3847/1538-4357/aa6338. ISSN 0004-637X. Bibcode: 2017ApJ...838...73M. 
  12. ↑ 12.0 12.1 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. doi:10.3847/1538-4357/833/1/96. ISSN 0004-637X. Bibcode: 2016ApJ...833...96L. 
  13. ↑ Rothermich, Austin; Faherty, Jacqueline K.; Bardalez-Gagliuffi, Daniella; Schneider, Adam C.; Kirkpatrick, J. Davy; Meisner, Aaron M.; Burgasser, Adam J.; Kuchner, Marc et al. (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. doi:10.3847/1538-3881/ad324e. ISSN 0004-6256. Bibcode: 2024AJ....167..253R. 
  14. ↑ "Planetary Systems". https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PS. 



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