2MASS J15404342−5101357
  2M1540 Location of 2M1540 in the constellation Norma | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Norma[1] |
| Right ascension | 15h 40m 43.536s[2] |
| Declination | −51° 01′ 35.97″[2] |
| Apparent magnitude (V) | 15.26[3] |
| Characteristics | |
| Evolutionary stage | main-sequence star[3] |
| Spectral type | M7V[3] |
| Apparent magnitude (J) | 8.96[4] |
| Astrometry | |
| Radial velocity (Rv) | 50.0[4] km/s |
| Proper motion (μ) | RA: 1949.461 mas/yr[2] Dec.: −324.789 mas/yr[2] |
| Parallax (π) | 187.7290±0.0496 mas[2] |
| Distance | 17.374 ± 0.005 ly (5.327 ± 0.001 pc) |
| Absolute bolometric magnitude (Mbol) | 12.81[3] |
| Details | |
| Mass | 0.105[5] M☉ |
| Radius | 0.122[5] R☉ |
| Luminosity | 9×10−4[5] L☉ |
| Temperature | 2621±100[3] K |
| Other designations | |
| GJ 12259,[6] 2M1540,[3] 2MASS J154043.42-510135.7, WISEA J154045.67-510139.3, UCAC4 195-119117, Gaia DR2 5985290231327158144 | |
| Database references | |
| SIMBAD | data |
2MASS J15404341−5101357 (abbreviated 2M1540) is a red dwarf of spectral type M7, located in Norma at 17.374 light-years from Earth.[3]
Discovery
[edit]Its discovery was announced in 2014 by Kirkpatrick et al.[7] and independently by Pérez Garrido et al.[3]
Kirkpatrick and colleagues found a few thousand new high proper motion objects under the AllWISE program of study of images, taken by Wide-field Infrared Survey Explorer (WISE). 2M1540 was one of these high proper motion objects. They named it WISEA J154045.67-510139.3 and assigned it spectral type M6.[7]
Pérez Garrido and colleagues were looking for high proper motion sources in the 2MASS–WISE cross-match. They named it 2MASS J154043.42-510135.7 (2M1540 for short) and classified it as an M7.0±0.5 dwarf.[3]
Since the trigonometric distance of 2M1540 agreed with its spectrophotometric distances, computed for a single object, it was concluded that it is not an equal-mass binary.[3]
References
[edit]- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e f g h i j Pérez Garrido, A.; Lodieu, N.; Béjar, V. J. S.; Ruiz, M. T.; Gauza, B.; Rebolo, R.; Zapatero Osorio, M. R. (2014). "2MASS J154043.42-510135.7: a new addition to the 5 pc population". Astronomy & Astrophysics. 567: A6. arXiv:1405.5439. Bibcode:2014A&A...567A...6P. doi:10.1051/0004-6361/201423615. S2CID 118704532.
- ^ a b Henry, Todd J.; Jao, Wei-Chun; Winters, Jennifer G.; Dieterich, Sergio B.; Finch, Charlie T.; Ianna, Philip A.; Riedel, Adric R.; Silverstein, Michele L.; Subasavage, John P.; Vrijmoet, Eliot Halley (2018). "The Solar Neighborhood XLIV: RECONS Discoveries within 10 parsecs". The Astronomical Journal. 155 (6): 265. arXiv:1804.07377. Bibcode:2018AJ....155..265H. doi:10.3847/1538-3881/aac262. S2CID 53983430.
- ^ a b c Ment, Kristo; Charbonneau, David (2023-06-01). "The Occurrence Rate of Terrestrial Planets Orbiting Nearby Mid-to-late M Dwarfs from TESS Sectors 1–42". The Astronomical Journal. 165 (6): 265. arXiv:2302.04242. Bibcode:2023AJ....165..265M. doi:10.3847/1538-3881/acd175. ISSN 0004-6256.
- ^ Golovin, Alex; Reffert, Sabine; Just, Andreas; Jordan, Stefan; Vani, Akash; Jahreiß, Hartmut (November 2022). "The Fifth Catalogue of Nearby Stars (CNS5)". Astronomy & Astrophysics. 670: A19. arXiv:2211.01449. Bibcode:2023A&A...670A..19G. doi:10.1051/0004-6361/202244250. S2CID 253264922. Catalogue can be accessed here.
- ^ a b Kirkpatrick, J. Davy; Schneider, Adam; Fajardo-Acosta, Sergio; Gelino, Christopher R.; Mace, Gregory N.; Wright, Edward L.; Logsdon, Sarah E.; McLean, Ian S.; Cushing, Michael C.; Skrutskie, Michael F.; Eisenhardt, Peter R.; Stern, Daniel; Baloković, Mislav; Burgasser, Adam J.; Faherty, Jacqueline K.; Lansbury, George B.; Rich, J. A.; Skrzypek, Nathalie; Fowler, John W.; Cutri, Roc M.; Masci, Frank J.; Conrow, Tim; Grillmair, Carl J.; McCallon, Howard L.; Beichman, Charles A.; Marsh, Kenneth A. (2014). "The AllWISE Motion Survey and the Quest for Cold Subdwarfs". The Astrophysical Journal. 783 (2): 122. arXiv:1402.0661. Bibcode:2014ApJ...783..122K. doi:10.1088/0004-637X/783/2/122. S2CID 30949660.
