AK Leporis Star in the constellation Lepus
AK Leporis , also known as Gamma Leporis B , is a variable star in the southern constellation of Lepus the hare. It has an apparent visual magnitude of 6.141,[ 3] Bortle scale , it is faintly visible from rural skies at night. This star forms a wide binary star system with Gamma Leporis —the two have an angular separation of 97″ [ 11] [ 12] Ursa Major Moving Group of stars that share a common motion through space.[ 8]
This is a BY Draconis variable star that undergoes slight brightness variations due to stellar activity. Differential rotation causes changes to the periodicity of the variation depending on the latitude of the activity.[ 4] X-ray emission has been detected from AK Leporis, and it is located at or near a radio source.[ 13]
Infrared observation of this star shows a large excess at a wavelength of 24 μm. This may be explained by the proximity of Gamma Leporis to the line of sight, or there may be a red dwarf companion or a dust disc. There is no excess observed at 70 μm.[ 9]
References
↑ Nitschelm, C.; des Etangs, A. Lecavelier; Vidal-Madjar, A.; Ferlet, R.; Olsen, E. H.; Dennefeld, M. (August 2000), "A three-year Strömgren photometric survey of suspected β Pictoris-like stars", Astronomy and Astrophysics Supplement Series , 145 (2): 275– 281, Bibcode :2000A& AS..145..275N , doi :10.1051/aas:2000243 1 2 3 4 5 6 7 8 9 10 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 . 1 2 3 Nordström, Andersen; et al. (2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ~14000 F and G dwarfs", Publications of the Astronomical Society of Australia , 21 (2): 129– 133, Bibcode :2004PASA...21..129N , doi :10.1071/AS04013 1 2 3 Lecavelier Des Etangs, A.; et al. (August 2005), "A photometric survey of stars with circumstellar material", Astronomy and Astrophysics , 439 (2): 571– 574, Bibcode :2005A& A...439..571L , doi :10.1051/0004-6361:20042401 1 2 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data , SIMBAD, Bibcode :1986EgUBV........0M . 1 2 3 Prugniel, Ph.; et al. (July 2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics , 531 : A165, arXiv :1104.4952 Bibcode :2011A& A...531A.165P , doi :10.1051/0004-6361/201116769 , S2CID 54940439 . ↑ Cincunegui, C.; Díaz, R. F.; Mauas, P. J. D. (2007). "Hα and the Ca II H and K lines as activity proxies for late-type stars". Astronomy and Astrophysics . 469 (1): 309. arXiv :astro-ph/0703511 Bibcode :2007A& A...469..309C . doi :10.1051/0004-6361:20066503 . 1 2 Biazzo, K.; et al. (December 2012), "Elemental abundances of low-mass stars in nearby young associations: AB Doradus, Carina Near and Ursa Major", Monthly Notices of the Royal Astronomical Society , 427 (4): 2905– 2916, arXiv :1209.2591 Bibcode :2012MNRAS.427.2905B , doi :10.1111/j.1365-2966.2012.22132.x S2CID 118617986 . 1 2 Lawler, S. M.; et al. (November 2009), "Explorations Beyond the Snow Line: Spitzer/IRS Spectra of Debris Disks Around Solar-type Stars", The Astrophysical Journal , 705 (1): 89– 111, arXiv :0909.0058 Bibcode :2009ApJ...705...89L , doi :10.1088/0004-637X/705/1/89 , S2CID 1272803 . ↑ "V* AK Lep" , SIMBAD Centre de données astronomiques de Strasbourg , retrieved 2015-04-02 .↑ Kaler, James B., "Gamma Leporis" , Stars , University of Illinois , retrieved 2015-04-02 . ↑ Reylé, Céline; Jardine, Kevin; Fouqué, Pascal; Caballero, Jose A.; Smart, Richard L.; Sozzetti, Alessandro (30 April 2021), "The 10 parsec sample in the Gaia era", Astronomy & Astrophysics 650 : A201, arXiv :2104.14972 Bibcode :2021A& A...650A.201R , doi :10.1051/0004-6361/202140985 , S2CID 233476431 . https://gruze.org/10pc/ Archived 12 March 2023 at the Wayback Machine ↑ Lazio, T. Joseph W.; et al. (January 2010), "A Blind Search for Magnetospheric Emissions from Planetary Companions to Nearby Solar-Type Stars", The Astronomical Journal , 139 (1): 96– 101, arXiv :0910.3938 Bibcode :2010AJ....139...96L , doi :10.1088/0004-6256/139/1/96 , S2CID 118537554 .
