HD 42936 – Wikipedia

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Star in the constellation Mensa

HD 42936 (DMPP-3) is a star located in the southern circumpolar constellation Mensa. With an apparent magnitude of 9.1,[2] it is too faint to be detected with the naked eye but can be seen with a telescope. The star is relatively close at a distance of about 153 light years[1] but is receding with a heliocentric radial velocity of 34.4 km/s.[6]

HD 42936 is an early K-type star with the blended luminosity class of a main sequence star and a subgiant.[3] At present it has 87% the mass of the Sun and 91% the radius of the Sun.[7] The object shines at 51% the luminosity of the Sun[8] from its photosphere at an effective temperature of 5,138 K,[7] which gives it an orangish yellow glow. HD 42936 has iron abundance 151% that of the Sun, meaning it is metal enriched[10] despite an age of 10.9 billion years.[7]

Planetary system[edit]

In 2019, an analysis carried out by a team of astronomers led by astronomer John R. Barnes of the Dispersed Matter Planet Project (DMPP) confirmed the existence of a super-Earth[7] in orbit around DMPP-3

See also[edit]

References[edit]

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (2021). “Gaia Early Data Release 3: Summary of the contents and survey properties”. Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A…649A…1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ a b c 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. ISSN 1063-7737. S2CID 255204555.
  3. ^ a b Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book…..H.
  4. ^ Cousins, A. W. J.; Stoy, R. H. (1962). “Photoelectric magnitudes and colours of Southern stars”. Royal Greenwich Observatory Bulletins. 64: 103. Bibcode:1962RGOB…64..103C.
  5. ^ Haswell, Carole A.; Staab, Daniel; Barnes, John R.; Anglada-Escudé, Guillem; Fossati, Luca; Jenkins, James S.; Norton, Andrew J.; Doherty, James P. J.; Cooper, Joseph (2019). “Dispersed Matter Planet Project discoveries of ablating planets orbiting nearby bright stars”. Nature Astronomy. 4 (4): 408–418. arXiv:1912.10874. doi:10.1038/s41550-019-0973-y. S2CID 209444484.
  6. ^ a b Gontcharov, G. A. (November 2006). “Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system”. Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL…32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737. S2CID 119231169.
  7. ^ a b c d e Barnes, John R.; Haswell, Carole A.; Staab, Daniel; Anglada-Escudé, Guillem; Fossati, Luca; Doherty, James P. J.; Cooper, Joseph; Jenkins, James S.; Díaz, Matías R.; Soto, Maritza G.; Peña Rojas, Pablo A. (2019). “An ablating 2.6-M🜨 planet in an eccentric binary from the Dispersed Matter Planet Project”. Nature Astronomy. 4 (4): 419–426. arXiv:1912.10793. doi:10.1038/s41550-019-0972-z. S2CID 209444780.
  8. ^ a b 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. ^ Pavlenko, Y. V.; Kaminsky, B. M.; Jenkins, J. S.; Ivanyuk, O. M.; Jones, H. R. A.; Lyubchik, Y. P. (January 2019). “Masses, oxygen, and carbon abundances in CHEPS dwarf stars”. Astronomy & Astrophysics. 621: A112. arXiv:1811.05011. Bibcode:2019A&A…621A.112P. doi:10.1051/0004-6361/201834138. ISSN 0004-6361.
  10. ^ a b Jenkins, J. S.; Jones, H. R. A.; Pavlenko, Y.; Pinfield, D. J.; Barnes, J. R.; Lyubchik, Y. (July 2008). “Metallicities and activities of southern stars”. Astronomy & Astrophysics. 485 (2): 571–584. arXiv:0804.1128. Bibcode:2008A&A…485..571J. doi:10.1051/0004-6361:20078611. ISSN 0004-6361.
  11. ^ HD 42936, entry, SIMBAD. Accessed online December 24, 2019.



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