HD 61005

HD 61005, also known as HIP 36948 and The Moth, is a young star located in the southern constellation Puppis, the poop deck. It has an apparent magnitude of 8.22,[2] making it readily visible in binoculars, but not to the naked eye. The object is located relatively close at a distance of 119 light years based on Gaia DR3 parallax measurements[1] but is receding with a heliocentric radial velocity of 22.6 km/s.[5]

HD 61005

The circumstellar disk of HD 61005
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Puppis
Right ascension 07h 35m 47.46236s[1]
Declination −32° 12′ 14.0451″[1]
Apparent magnitude (V) 8.22±0.01[2]
Characteristics
Spectral type G8 Vk[3]
B−V color index +0.73[4]
R−I color index +0.38[4]
Astrometry
Radial velocity (Rv)22.64±0.04[5] km/s
Proper motion (μ) RA: −55.050[1] mas/yr
Dec.: +74.319[1] mas/yr
Parallax (π)27.4344 ± 0.0155 mas[1]
Distance118.89 ± 0.07 ly
(36.45 ± 0.02 pc)
Absolute magnitude (MV)+5.49[6]
Details
Mass0.96±0.01[7] M☉
Radius0.81[8] R☉
Luminosity0.61[9] L☉
Surface gravity (log g)4.54±0.07 cgs
Temperature5,598[9] K
Metallicity [Fe/H]+0.01±0.04[10] dex
Rotational velocity (v sin i)8.2[11] km/s
Age30[10] Myr
Other designations
CD−31°4778, CPD−31°1685, HD 61005, HIP 36948, SAO 198166, TYC 7109-2638-1[12]
Database references
SIMBADdata

Characteristics

HD 61005 has a stellar classification of G8 Vk,[3] indicating that it is a yellow dwarf with interstellar absorption features in its spectrum. However, it is younger than the Sun at an age of 30 million years. Other studies place it an older age, ranging from 135 million years to 2 billion years.[13][14] The star retains a detectable debris disk - a disk of dust created from collisions of planetesimals in a belt analogous to the Solar System's Kuiper belt. HD 61005 is located in the Local Bubble, a region with a low concentration of interstellar dust. It is suspected to be a member of the Argus association.[15]

It has 96% the mass of the Sun[7] and 81% of its solar radius.[8] It radiates 61% of the luminosity of the Sun from its photosphere at an effective temperature of 5,598 K,[9] giving it a yellow hue. HD 61005 has a solar metallicity[10] — what astronomers dub chemical elements heavier than helium; it spins modestly with a projected rotational velocity of 8.2 km/s.[11]

Debris disk

In 2007, astronomer Dean C. Hines and colleagues announced the discovery of a debris disk around HD 61005.[16] The disk has an unusual shape, which may be due to the influence of the dense regions of the interstellar medium. The researchers also suggest that the passage through these areas can affect the atmosphere of planets that form. The disc morphology resembles the shape of a moth, inspiring its informal name. Analysis of the data did not confirm the presence of planets in the system.

References
  1. 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.
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2 June 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. eISSN 1538-3881. ISSN 0004-6256.
  4. Kotoneva, E.; Flynn, C.; Chiappini, C.; Matteucci, F. (1 November 2002). "K dwarfs and the chemical evolution of the solar cylinder". Monthly Notices of the Royal Astronomical Society. 336 (3): 879–891. arXiv:astro-ph/0206446. Bibcode:2002MNRAS.336..879K. doi:10.1046/j.1365-8711.2002.05825.x. eISSN 1365-2966. ISSN 0035-8711.
  5. Desidera, S.; Covino, E.; Messina, S.; Carson, J.; Hagelberg, J.; Schlieder, J. E.; Biazzo, K.; Alcalá, J. M.; Chauvin, G.; Vigan, A.; Beuzit, J. L.; Bonavita, M.; Bonnefoy, M.; Delorme, P.; D’Orazi, V.; Esposito, M.; Feldt, M.; Girardi, L.; Gratton, R.; Henning, T.; Lagrange, A. M.; Lanzafame, A. C.; Launhardt, R.; Marmier, M.; Melo, C.; Meyer, M.; Mouillet, D.; Moutou, C.; Segransan, D.; Udry, S.; Zaidi, C. M. (January 2015). "The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs in wide orbits". Astronomy & Astrophysics. 573: A126. arXiv:1405.1559. Bibcode:2015A&A...573A.126D. doi:10.1051/0004-6361/201323168. eISSN 1432-0746. ISSN 0004-6361.
  6. 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.
  7. Gomes da Silva, J.; Santos, N. C.; Adibekyan, V.; Sousa, S. G.; Campante, T. L.; Figueira, P.; Bossini, D.; Delgado-Mena, E.; Monteiro, M. J. P. F. G.; de Laverny, P.; Recio-Blanco, A.; Lovis, C. (February 2021). "Stellar chromospheric activity of 1674 FGK stars from the AMBRE-HARPS sample". Astronomy & Astrophysics. 646: A77. arXiv:2012.10199. Bibcode:2021A&A...646A..77G. doi:10.1051/0004-6361/202039765. eISSN 1432-0746. ISSN 0004-6361.
  8. Rhee, Joseph H.; Song, Inseok; Zuckerman, B.; McElwain, Michael (10 May 2007). "Characterization of Dusty Debris Disks: The IRAS and Hipparcos Catalogs". The Astrophysical Journal. 660 (2): 1556–1571. arXiv:astro-ph/0609555. Bibcode:2007ApJ...660.1556R. doi:10.1086/509912. eISSN 1538-4357. ISSN 0004-637X.
  9. Ballering, Nicholas P.; Rieke, George H.; Su, Kate Y. L.; Gáspár, András (18 August 2017). "What Sets the Radial Locations of Warm Debris Disks?". The Astrophysical Journal. 845 (2): 120. arXiv:1708.07151. Bibcode:2017ApJ...845..120B. doi:10.3847/1538-4357/aa8037. eISSN 1538-4357.
  10. De Silva, G. M.; D’Orazi, V.; Melo, C.; Torres, C. A. O.; Gieles, M.; Quast, G. R.; Sterzik, M. (13 March 2013). "Search for associations containing young stars: chemical tagging IC 2391 and the Argus association★". Monthly Notices of the Royal Astronomical Society. 431 (2): 1005–1018. arXiv:1301.5967. Bibcode:2013MNRAS.431.1005D. doi:10.1093/mnras/stt153. eISSN 1365-2966. ISSN 0035-8711.
  11. Schröder, C.; Reiners, A.; Schmitt, J. H. M. M. (11 September 2008). "Ca II HK emission in rapidly rotating stars". Astronomy & Astrophysics. 493 (3): 1099–1107. Bibcode:2009A&A...493.1099S. doi:10.1051/0004-6361:200810377. eISSN 1432-0746. ISSN 0004-6361.
  12. "HD 61005". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 December 2016.
  13. Roccatagliata, V.; Henning, Th.; Wolf, S.; Rodmann, J.; Corder, S.; Carpenter, J. M.; Meyer, M. R.; Dowell, D. (24 February 2009). "Long-wavelength observations of debris discs around sun-like stars". Astronomy & Astrophysics. 497 (2): 409–421. arXiv:0902.0338. Bibcode:2009A&A...497..409R. doi:10.1051/0004-6361/200811018. eISSN 1432-0746. ISSN 0004-6361.
  14. Luck, R. Earle (13 February 2018). "Abundances in the Local Region. III. Southern F, G, and K Dwarfs". The Astronomical Journal. 155 (3): 111. Bibcode:2018AJ....155..111L. doi:10.3847/1538-3881/aaa9b5. eISSN 1538-3881.
  15. Desidera, S.; Covino, E.; Messina, S.; D’Orazi, V.; Alcalá, J. M.; Brugaletta, E.; Carson, J.; Lanzafame, A. C.; Launhardt, R. (31 March 2011). "The debris disk host star HD 61005: a member of the Argus association?". Astronomy & Astrophysics. 529: A54. arXiv:1102.3333. Bibcode:2011A&A...529A..54D. doi:10.1051/0004-6361/201016267. eISSN 1432-0746. ISSN 0004-6361.
  16. Hines, Dean C.; Schneider, Glenn; Hollenbach, David; Mamajek, Eric E.; Hillenbrand, Lynne A.; Metchev, Stanimir A.; Meyer, Michael R.; Carpenter, John M.; Moro-Martín, Amaya; Silverstone, Murray D.; Kim, Jinyoung Serena; Henning, Thomas; Bouwman, Jeroen; Wolf, Sebastian (21 November 2007). "The Moth: An Unusual Circumstellar Structure Associated with HD 61005". The Astrophysical Journal. 671 (2): L165–L168. Bibcode:2007ApJ...671L.165H. doi:10.1086/525016. eISSN 1538-4357. ISSN 0004-637X.
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