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.

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. 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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