Misplaced Pages

T Chamaeleontis

Article snapshot taken from[REDACTED] with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
T Tauri star; Chamaeleon
T Chamaeleontis

A visual band light curve for T Chamaeleontis, plotted from AAVSO data
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon
Right ascension 11 57 13.52451
Declination −79° 21′ 31.5305″
Apparent magnitude (V) 10.05 - 14.50
Characteristics
Evolutionary stage T Tauri star
Spectral type K0e
U−B color index +0.63
B−V color index +1.14
J−K color index +1.67
Variable type Orion variable
Astrometry
Radial velocity (Rv)13.8±0.1 km/s
Proper motion (μ) RA: −41.586 mas/yr
Dec.: −8.655 mas/yr
Parallax (π)9.7356 ± 0.0332 mas
Distance335 ± 1 ly
(102.7 ± 0.4 pc)
Absolute magnitude (MV)+6.55
Details
Mass0.65 M☉
Radius0.65±0.09 R☉
Luminosity0.29 L☉
Surface gravity (log g)4.50 cgs
Temperature5,111 K
Metallicity +0.09±0.15 dex
Rotational velocity (v sin i)39±3 km/s
Age12.7 Myr
Other designations
T Cha, HIP 58285, TYC 9419-1187-1, GSC 09419-01187, 2MASS J11571348-7921313
Database references
SIMBADdata

T Chamaeleontis (T Cha), also known as HIP 58285, is a T Tauri star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude that ranges from 10.05 to 14.50, which is below the limit for naked eye visibility. Gaia DR3 parallax measurements place the object 335 light years away and it is currently receding with a heliocentric radial velocity of 13.8 km/s. At its current distance, T Cha's average brightness is diminished by 0.31 magnitudes due to extinction from interstellar dust. It has an average absolute magnitude of +6.55.

History

The object was first suspected to be a RW Aurigae-type star since 1949. It was categorized as a T-Tauri star in 1975. In the same year, it was suspected to be variable and the variability was confirmed in 1976. A 1993 paper said that it might be a weak-lined YY Orionis star. T Cha might be either a member of the young ε Chamaeleontis association or the slightly older η Chamaeleontis association. T Cha is an Orion variable that fluctuates between 10.05 and 14.5.

Physical characteristics

T Cha has a stellar classification of K0e, indicating that it is a K-type star with emission lines in its spectrum. It is currently on the T Tauri stage, accreting matter at a rate of 3.16×10 to 1.26×10 M☉/yr. It has 65% the mass of the Sun but the radius is highly uncertain. Estimates range from 0.65 to 4.36 times the radius of the Sun. It radiates 29% the luminosity of the Sun from its photosphere at an effective temperature of 5,111 K, giving it an orange hue. T Cha has a poorly constrained metallicity of = +0.09 and it spins modestly with a projected rotational velocity of 39 km/s.


References

  1. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. ^ 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.
  3. ^ "VSX : Detail for T Cha". Retrieved 2023-01-08.
  4. ^ Mauder, H.; Sosna, F. M. (1975). "Light Changes of T Tauri Stars in the Chamaeleon Association". Information Bulletin on Variable Stars. 1049: 1. Bibcode:1975IBVS.1049....1M.
  5. ^ Torres, C. A. O.; Quast, G. R.; da Silva, L.; de la Reza, R.; Melo, C. H. F.; Sterzik, M. (12 September 2006). "Search for associations containing young stars (SACY). I. Sample and searching method". Astronomy & Astrophysics. 460 (3): 695–708. arXiv:astro-ph/0609258. Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. eISSN 1432-0746. ISSN 0004-6361. S2CID 16080025.
  6. ^ Bastian, U.; Mundt, R. (1979). "UBV photometry of T Tauri stars and related objects". Astronomy and Astrophysics Supplement Series. 36: 57. Bibcode:1979A&AS...36...57B. ISSN 0365-0138. S2CID 118968842.
  7. Glass, I. S.; Pension, M. V. (1 May 1974). "An Infrared Survey of RW Aurigae Stars". Monthly Notices of the Royal Astronomical Society. 167 (2): 237–249. Bibcode:1974MNRAS.167..237G. doi:10.1093/mnras/167.2.237. eISSN 1365-2966. ISSN 0035-8711. S2CID 120222716.
  8. ^ Samus’, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. eISSN 1562-6881. ISSN 1063-7729. S2CID 125853869.
  9. ^ Zúñiga-Fernández, S.; Bayo, A.; Elliott, P.; Zamora, C.; Corvalán, G.; Haubois, X.; Corral-Santana, J. M.; Olofsson, J.; Huélamo, N.; Sterzik, M. F.; Torres, C. A. O.; Quast, G. R.; Melo, C. H. F. (24 December 2020). "Search for associations containing young stars (SACY)". Astronomy & Astrophysics. 645: A30. arXiv:2010.08575. Bibcode:2021A&A...645A..30Z. doi:10.1051/0004-6361/202037830. eISSN 1432-0746. ISSN 0004-6361. S2CID 239745123.
  10. ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  11. ^ Baron, Frédérique; Lafrenière, David; Artigau, Étienne; Gagné, Jonathan; Rameau, Julien; Delorme, Philippe; Naud, Marie-Eve (17 October 2019). "Constraints on the Occurrence and Distribution of 1–20 M Jup Companions to Stars at Separations of 5–5000 au from a Compilation of Direct Imaging Surveys". The Astronomical Journal. 158 (5): 187. arXiv:1909.06255. Bibcode:2019AJ....158..187B. doi:10.3847/1538-3881/ab4130. eISSN 1538-3881. S2CID 202572902.
  12. ^ Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
  13. ^ Sartori, M. J.; Lépine, J. R. D.; Dias, W. S. (June 2003). "Formation scenarios for the young stellar associations between galactic longitudes l = 280° - 360°". Astronomy & Astrophysics. 404 (3): 913–926. arXiv:astro-ph/0304426. Bibcode:2003A&A...404..913S. doi:10.1051/0004-6361:20030581. eISSN 1432-0746. ISSN 0004-6361. S2CID 17411999.
  14. ^ da Silva, L.; Torres, C. A. O.; de la Reza, R.; Quast, G. R.; Melo, C. H. F.; Sterzik, M. F. (8 October 2009). "Search for associations containing young stars (SACY)". Astronomy & Astrophysics. 508 (2): 833–839. arXiv:0909.0677. Bibcode:2009A&A...508..833D. doi:10.1051/0004-6361/200911736. eISSN 1432-0746. ISSN 0004-6361.
  15. ^ Bochanski, John J.; Faherty, Jacqueline K.; Gagné, Jonathan; Nelson, Olivia; Coker, Kristina; Smithka, Iliya; Desir, Deion; Vasquez, Chelsea (12 March 2018). "Fundamental Properties of Co-moving Stars Observed byGaia". The Astronomical Journal. 155 (4): 149. arXiv:1801.00537. Bibcode:2018AJ....155..149B. doi:10.3847/1538-3881/aaaebe. eISSN 1538-3881.
  16. ^ Covino, E.; Alcala, J. M.; Allain, S.; Bouvier, J.; Terranegra, L.; Krautter, J. (1997). "A study of the Chamaeleon star-forming region from the ROSAT all-sky survey. III. High resolution spectroscopic study". Astronomy and Astrophysics. 328: 187. Bibcode:1997A&A...328..187C. ISSN 0004-6361.
  17. ^ Murphy, Simon J.; Lawson, Warrick A.; Bessell, Michael S. (20 August 2013). "Re-examining the membership and origin of the ϵ Cha association". Monthly Notices of the Royal Astronomical Society. 435 (2): 1325–1349. arXiv:1305.4177. Bibcode:2013MNRAS.435.1325M. doi:10.1093/mnras/stt1375. eISSN 1365-2966. ISSN 0035-8711. S2CID 55556494.
  18. Hoffmeister, C. (1949). "Die RW Aurigae'Sterne und ihre Nebenformen". Astronomische Nachrichten (in German). 278 (1): 24–40. Bibcode:1949AN....278...24H. doi:10.1002/asna.19492780102. eISSN 1521-3994. ISSN 0004-6337. S2CID 122025222.
  19. Glasby, J. S. (1976). "The nebular variables". Journal of the British Astronomical Association. 86: 344. Bibcode:1976JBAA...86..344G.
  20. Alcala, J. M.; Covino, E.; Franchini, M.; Krautter, J.; Terranegra, L.; Wichmann, R. (May 1993). "T Chamaeleontis : A "weak-line" YY Orionis star ?". Astronomy and Astrophysics. 272: 225. Bibcode:1993A&A...272..225A. S2CID 122408037.
  21. Cahill, Eoin; Whelan, Emma T; Huelamo, Nuria; Alcala, Juan (28 January 2019). "UVES Spectroscopy of T Chamaeleontis: Line Variability, Mass Accretion rate and Spectro-astrometric Analysis★". Monthly Notices of the Royal Astronomical Society. 484 (3): 4315. arXiv:1902.01170. Bibcode:2019MNRAS.484.4315C. doi:10.1093/mnras/stz280. eISSN 1365-2966. ISSN 0035-8711. S2CID 118944630.
  22. Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants. Surface brightness relations calibrated by interferometry". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361. S2CID 6077801.
Constellation of Chamaeleon
Stars
Bayer
Variable
HR
HD
Other
Exoplanets
Star clustersη Chamaeleontis cluster
Nebulae
Galaxies
NGC
Category
Categories:
T Chamaeleontis Add topic