Astronomy:HD 65750

From HandWiki
Short description: Star in the constellation Carina
HD 65750
280px
The nebula surrounding HD 65750
Observation data
Equinox J2000.0]] (ICRS)
Constellation Carina[1]
Right ascension  07h 56m 50.94795s[2]
Declination −59° 07′ 32.7605″[2]
Apparent magnitude (V) 6.2 - 7.1[3]
Characteristics
Evolutionary stage AGB[4]
Spectral type M1 II[5]
U−B color index +2.18[6]
B−V color index +1.93[6]
Variable type LB[7]
Astrometry
Radial velocity (Rv)+23.17 km/s
Proper motion (μ) RA: −4.030[8] mas/yr
Dec.: +9.789[8] mas/yr
Parallax (π)2.6230 ± 0.0931[8] mas
Distance1,240 ± 40 ly
(380 ± 10 pc)
Details
Mass3.6[9] M☉
Radius121[10] R☉
Luminosity2,297[10] L☉
Surface gravity (log g)0.60[11] cgs
Temperature3,640[10] K
Metallicity [Fe/H]−0.4[12] dex
Other designations
V341 Car, CD−58°1926, HD 65750, HIP 38834, SAO 235638, HR 3126[13]
Database references
SIMBADdata

HD 65750, also known as V341 Carinae is a bright red giant star in the constellation Carina. It is surrounded by a prominent reflection nebula,[14][13] known as IC 2220, nicknamed the Toby Jug Nebula.

Characteristics

A light curve for V341 Carinae, plotted from Hipparcos data.[15]

Olin Jeuck Eggen and Norman Roy Stokes announced their discovery that the star's brightness varies, in 1970.[16] It was given its variable star designation, V341 Carinae, in 1975.[17] HD 65750 is located about 900 light years away, and has an apparent magnitude that varies between 6.2 and 7.1 and a metallicity just 40% of the Sun. When it is at its brightest, it is very faintly visible to the naked eye of a person with excellent observing conditions. It is part of the Diamond Cluster moving group.

The star has a radial velocity of 20 km/s.[18] The star has a radius over 100 times wider than the Sun's; were it to replace the Sun, HD 65750 would extend past the orbit of Mercury.

Nebulae

The nebulae is a mystery as the variations in nebulae brightness appear to be unrelated to the host star.[19] One theory is that rather than being an accreting protoplanetary disk the star may be an evolved star that is losing material.[20][21]

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R  Constellation record for this object at VizieR.
  2. ↑ 2.0 2.1 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL.  Vizier catalog entry
  3. ↑ "V341 Carinae". AAVSO. https://www.aavso.org/vsx/index.php?view=detail.top&oid=6094. 
  4. ↑ Kučinskas, Arñas (1998). "Circumstellar Shells of the Mass-Losing Asymptotic Giant Branch Stars: Limits for the Dust-Driven Winds". Astrophysics and Space Science 262 (2): 127. doi:10.1023/A:1001887521474. Bibcode: 1998Ap&SS.262..127K. 
  5. ↑ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins Catalog of Revised MK Types for the Cooler Stars". The Astrophysical Journal Supplement Series 71: 245. doi:10.1086/191373. Bibcode: 1989ApJS...71..245K. 
  6. ↑ 6.0 6.1 Dachs, J. (2000). "On the photometric variations of the red giant HD 65750 and of the surrounding reflection nebula IC 2220". Astronomy and Astrophysics 63 (3): 353–362. Bibcode: 1978A&A....63..353D. 
  7. ↑ Samus, N. N. et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S 1: B/GCVS. Bibcode: 2009yCat....102025S. 
  8. ↑ 8.0 8.1 8.2 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  9. ↑ Kos, Janez (2024). "Tidal tails of open clusters". Astronomy and Astrophysics 691: A28. doi:10.1051/0004-6361/202449828. Bibcode: 2024A&A...691A..28K. 
  10. ↑ 10.0 10.1 10.2 Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel et al. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series 268 (1): 4. doi:10.3847/1538-4365/acdee5. Bibcode: 2023ApJS..268....4F. 
  11. ↑ Rebull, Luisa M.; Carlberg, Joleen K.; Gibbs, John C.; Deeb, J. Elin; Larsen, Estefania; Black, David V.; Altepeter, Shailyn; Bucksbee, Ethan et al. (2015). "On Infrared Excesses Associated with Li-rich K Giants". The Astronomical Journal 150 (4): 123. doi:10.1088/0004-6256/150/4/123. Bibcode: 2015AJ....150..123R. 
  12. ↑ Castilho, B. V. (2000). "Detailed analysis of a sample of Li-rich giants". Astronomy and Astrophysics 364: 674–682. Bibcode: 2000A&A...364..674C. 
  13. ↑ 13.0 13.1 "HD 65750". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+65750. 
  14. ↑ "HIP 38834". http://www.astrostudio.org/xhip.php?hip=38834. 
  15. ↑ "Hipparcos Tools Interactive Data Access". ESA. https://www.cosmos.esa.int/web/hipparcos/interactive-data-access. 
  16. ↑ Eggen, O. J.; Stokes, N. R. (July 1970). "Narrow-Band and Broad-Band Photometry of Red Stars. III. Southern Giants". Astrophysical Journal 161: 199–216. doi:10.1086/150525. Bibcode: 1970ApJ...161..199E. 
  17. ↑ Kukarkin, B. V.; Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (January 1975). "60th Name-List of Variable Stars". Information Bulletin on Variable Stars 961: 1. Bibcode: 1975IBVS..961....1K. 
  18. ↑ "IC 2220 - The Toby Jug Nebula". http://www.poyntsource.com/Richard/toby_jug_nebula_ic_2220.htm. 
  19. ↑ Dachs, J.; Isserstedt, J.; Rahe, J. (1978). "On the photometric variations of the red giant HD 65750 and of the surrounding reflection nebula IC 2220". Astronomy and Astrophysics 63: 353. Bibcode: 1978A&A....63..353D. 
  20. ↑ Humphreys, R. M.; Ney, E. P. (1974). "Infrared observations of HD 65750, a red giant in a reflection nebula". Astronomy and Astrophysics 30: 159. Bibcode: 1974A&A....30..159H. 
  21. ↑ ((ESO, Garching, Germany)) (October 14, 2013). "A close look at the Toby Jug Nebula". Astronomy magazine. http://astronomy.com/news/2013/10/a-close-look-at-the-toby-jug-nebula. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:HD_65750&oldid=4134776"