HD 65750

Last updated
HD 65750
Toby Jug Nebula.jpg
The nebula surrounding HD 65750
Observation data
Epoch J2000        Equinox J2000
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  mas [8]
Distance 1,240 ± 40  ly
(380 ± 10  pc)
Details
Mass 3.6 [9]   M☉
Radius 121 [10]   R☉
Luminosity 2,297 [10]   L☉
Surface gravity (log g)0.60 [11]   cgs
Temperature 3,640 [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
SIMBAD data

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.

Contents

Characteristics

A light curve for V341 Carinae, plotted from Hipparcos data. V341CarLightCurve.png
A light curve for V341 Carinae, plotted from Hipparcos data.

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.

Nebula

The nebula is unusual as the variations in its 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. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID   18759600. Vizier catalog entry
  3. ↑ "V341 Carinae". International Variable Star Index. AAVSO . Retrieved 2020-03-04.
  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. Bibcode:1998Ap&SS.262..127K. doi:10.1023/A:1001887521474.
  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. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
  6. 1 2 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.; Durlevich, O. V.; 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. 1 2 3 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  9. ↑ Kos, Janez (2024). "Tidal tails of open clusters". Astronomy and Astrophysics. 691: A28. arXiv: 2406.18767 . Bibcode:2024A&A...691A..28K. doi:10.1051/0004-6361/202449828.
  10. 1 2 3 Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel; Jenkins, Jon M.; Stassun, Keivan; Twicken, Joseph D.; Vanderspek, Roland; Winn, Joshua N. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series. 268 (1): 4. arXiv: 2208.11721 . Bibcode:2023ApJS..268....4F. doi: 10.3847/1538-4365/acdee5 .
  11. ↑ Rebull, Luisa M.; Carlberg, Joleen K.; Gibbs, John C.; Deeb, J. Elin; Larsen, Estefania; Black, David V.; Altepeter, Shailyn; Bucksbee, Ethan; Cashen, Sarah; Clarke, Matthew; Datta, Ashwin; Hodgson, Emily; Lince, Megan (2015). "On Infrared Excesses Associated with Li-rich K Giants". The Astronomical Journal. 150 (4): 123. arXiv: 1507.00708 . Bibcode:2015AJ....150..123R. doi:10.1088/0004-6256/150/4/123.
  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. 1 2 "HD 65750". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-03-04.
  14. ↑ "HIP 38834". Archived from the original on 2015-09-26. Retrieved 2019-06-28.
  15. ↑ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  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. Bibcode:1970ApJ...161..199E. doi:10.1086/150525.
  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" . Retrieved 2019-06-28.
  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. Retrieved 2019-06-28.
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