LkCa 15
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 39m 17.796s[1] |
| Declination | +22° 21′ 03.48″[1] |
| Apparent magnitude (V) | +11.91[2] |
| Characteristics | |
| Spectral type | K5V[2] |
| Variable type | T Tauri[1] |
| Astrometry | |
| Proper motion (μ) | RA: 9.4[1] mas/yr Dec.: -13.2[1] mas/yr |
| Distance | 473[2] ly (145[2] pc) |
| Details | |
| Mass | 0.97 ± 0.03[2] M☉ |
| Radius | 1.6[3] R☉ |
| Luminosity | 1.22[4] L☉ |
| Temperature | 4370[4] K |
| Age | 2[2] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
LkCa 15 is a T Tauri star in the Taurus-Auriga Star Forming Region. These types of stars are relatively young pre-main-sequence stars that show irregular variations in brightness.[5] It has a mass that is about 97% of the Sun,[2] an effective temperature of 4370 K,[4] slightly cooler than the Sun. Its apparent magnitude is 11.91,[2] meaning it is not visible to the naked eye.
LkCa 15 is surrounded by a protoplanetary disk, typical of many T Tauri stars.[5] The disk around the star is about 55 times more massive than Jupiter.[6] Small changes in the observed brightness of the disk may be due to a planetary companion; the star likely has a protoplanetary object or exoplanet orbiting it, known as LkCa 15 b[7][8] This name stems from an older survey.[9]
References
- ^ a b c d e f "EM* LkCa 15". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ a b c d e f g h "Notes on LKCA 15 b". Retrieved 26 December 2016.
- ^ Espaillat, C.; d'Alessio, P.; Hernández, J.; Nagel, E.; Luhman, K. L.; Watson, D. M.; Calvet, N.; Muzerolle, J.; McClure, M. (2010). "Unveiling the Structure of Pre-Transitional Disks". The Astrophysical Journal. 717: 441. arXiv:1005.2365. Bibcode:2010ApJ...717..441E. doi:10.1088/0004-637X/717/1/441.
- ^ a b c Thalmann, C.; Mulders, G. D.; Hodapp, K.; Janson, M.; Grady, C. A.; Min, M.; De Juan Ovelar, M.; Carson, J.; Brandt, T.; Bonnefoy, M.; McElwain, M. W.; Leisenring, J.; Dominik, C.; Henning, T.; Tamura, M. (2014). "The architecture of the Lk Ca 15 transitional disk revealed by high-contrast imaging". Astronomy & Astrophysics. 566: A51. arXiv:1402.1766. Bibcode:2014A&A...566A..51T. doi:10.1051/0004-6361/201322915.
- ^ a b "Encyclopedia of Science: T Tauri star". Retrieved 17 January 2017.
- ^ Andrews, Sean M.; Williams, Jonathan P. (2005). "Circumstellar Dust Disks in Taurus‐Auriga: The Submillimeter Perspective". The Astrophysical Journal. 631 (2): 1134. arXiv:astro-ph/0506187. Bibcode:2005ApJ...631.1134A. doi:10.1086/432712.
- ^ Kraus, Adam L.; Ireland, Michael J. (2012). "Lk Ca 15: A YOUNG EXOPLANET CAUGHT AT FORMATION?". The Astrophysical Journal. 745: 5. arXiv:1110.3808. Bibcode:2012ApJ...745....5K. doi:10.1088/0004-637x/745/1/5.
- ^ Sallum, S.; Follette, K. B.; Eisner, J. A.; Close, L. M.; Hinz, P.; Kratter, K.; Males, J.; Skemer, A.; MacIntosh, B.; Tuthill, P.; Bailey, V.; Defrère, D.; Morzinski, K.; Rodigas, T.; Spalding, E.; Vaz, A.; Weinberger, A. J. (2015). "Accreting protoplanets in the Lk Ca 15 transition disk". Nature. 527 (7578): 342. arXiv:1511.07456. Bibcode:2015Natur.527..342S. doi:10.1038/nature15761. PMID 26581290.
- ^ Herbig, G. H.; Vrba, F. J.; Rydgren, A. E. (1986). "A spectroscopic survey of the Taurus-Auriga dark clouds for pre-main-sequence stars having CA II H, K emission". The Astronomical Journal. 91: 575. Bibcode:1986AJ.....91..575H. doi:10.1086/114039.
 | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |
 | This variable star–related article is a stub. You can help Wikipedia by expanding it. |