From Wikipedia, the free encyclopedia
HD 65750

The nebula surrounding HD 65750
Observation data
Epoch J2000       Equinox J2000
Constellation Carina
Right ascension 07h 56m 50.94795s [1]
Declination −59° 07′ 32.7605″ [1]
Apparent magnitude (V) 6.2 - 7.1 [2]
Characteristics
Spectral type M1 II [3]
U−B color index +2.18 [4]
B−V color index +1.93 [4]
Variable type LB [5]
Astrometry
Radial velocity (Rv)23.17 km/s
Proper motion (μ) RA: -4.030 [6]  mas/ yr
Dec.: 9.789 [6]  mas/ yr
Parallax (π)2.6230 ± 0.0931  mas [6]
Distance1,240 ± 40  ly
(380 ± 10  pc)
Details
Mass1.11 [7]  M☉
Radius103 [6]  R☉
Luminosity1,698 [6]  L☉
Surface gravity (log g)0.31 [7]  cgs
Temperature3,650 [6]  K
Metallicity [Fe/H]-0.4 [8]  dex
Other designations
V341 Car, CD-58°1926, HD 65750, HIP 38834, SAO 235638, HR 3126 [9]
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, [10] [9] known as IC 2220, nicknamed the Toby Jug Nebula.

Characteristics

A light curve for V341 Carinae, plotted from Hipparcos data. [11]

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. It is part of the Diamond Cluster moving group.

The star has a radial velocity of 20  km/s. [12]

Nebulae

The nebulae is a mystery as the variations in nebulae brightness appear to be unrelated to the host star. [13] One theory is that rather than being an accreting protoplanetary disk the star may be an evolved star that is losing material. [14] [15]

References

  1. ^ a b 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
  2. ^ "V341 Carinae". International Variable Star Index. AAVSO. Retrieved 2020-03-04.
  3. ^ 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.
  4. ^ a b 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.
  5. ^ 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.
  6. ^ a b c d e f 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.
  7. ^ a b Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv: 1904.11302. Bibcode: 2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765. S2CID  131780028.
  8. ^ Castilho, B. V. (2000). "Detailed analysis of a sample of Li-rich giants". Astronomy and Astrophysics. 364: 674–682. Bibcode: 2000A&A...364..674C.
  9. ^ a b "HD 65750". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-03-04.
  10. ^ "HIP 38834". Archived from the original on 2015-09-26. Retrieved 2019-06-28.
  11. ^ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
  12. ^ "IC 2220 - The Toby Jug Nebula". Retrieved 2019-06-28.
  13. ^ 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.
  14. ^ 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.
  15. ^ ESO, Garching, Germany (October 14, 2013). "A close look at the Toby Jug Nebula". Astronomy magazine. Retrieved 2019-06-28.{{ cite web}}: CS1 maint: multiple names: authors list ( link)
Retrieved from " https://en.wikipedia.org/?title=HD_65750&oldid=1124782724"