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
- 1 2 3 4 5 6 "EM* LkCa 15". SIMBAD. Centre de données astronomiques de Strasbourg.
- 1 2 3 4 5 6 7 8 "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. Bibcode:2010ApJ...717..441E. arXiv:1005.2365
. doi:10.1088/0004-637X/717/1/441. - 1 2 3 Thalmann, C.; et al. (1 June 2014). "The architecture of the LkCa 15 transitional disk revealed by high-contrast imaging". Astronomy & Astrophysics. 566 (id.A51): A51. Bibcode:2014A&A...566A..51T. arXiv:1402.1766 . doi:10.1051/0004-6361/201322915.
- 1 2 "Encyclopedia of Science: T Tauri star". Retrieved 17 January 2017.
- ↑ Andrews & Williams (8 June 2005). "Circumstellar Dust Disks in Taurus-Auriga: The Submillimeter Perspective". The Astrophysical Journal. 631 (2): 1134. doi:10.1086/432712. Retrieved 11 September 2016.
- ↑ Kraus & Ireland (2012). "A young exoplanet caught at formation?". Astrophysical Journal. 745. doi:10.1088/0004-637x/745/1/5.
- ↑ Sallum S.; et al. (1 November 2015). "Accreting Protoplanets in the LkCa15 transition disk". Nature. 527. arXiv:1511.07456 .
- ↑ Herbig; et al. (1 March 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. Retrieved 11 September 2016.