Binary or triple star system in the constellation Eridanus
This article is about s Eridani. For S Eridani, see
64 Eridani .
HD 16754 is abinary [ 11] [ 8] constellation Eridanus . It has theBayer designation s Eridani ;HD 16754 is the designation from theHenry Draper catalogue apparent visual magnitude of +4.74.[ 2] light years from theSun based onparallax ,[ 1] radial velocity of +18 km/s.[ 2] Columba association of co-moving stars.[ 12]
This object was flagged as anastrometric binary based on proper motion measurements made from theHipparcos spacecraft.[ 13] [ 14] A-type primary plus a faint M-type companion at anangular separation of″ [ 8]
The main component is anA-type main-sequence star with astellar classification of A1 Vb.[ 3] [ 7] [ 8] projected rotational velocity of 168 km/s.[ 9] [ 6]
The visible companion is ared dwarf star with a class in the range M2-5V. The system is a source ofX-ray emission with a luminosity of× 1020 W [ 4]
^a b c d 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 atVizieR .^a b c d e f Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation",Astronomy Letters ,38 (5): 331,arXiv :1108.4971 Bibcode :2012AstL...38..331A ,doi :10.1134/S1063773712050015 ,S2CID 119257644 . ^a b c Gray, R. O.; et al. (July 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 ,S2CID 119476992 . ^a b Schröder, C.; Schmitt, J. H. M. M. (November 2007), "X-ray emission from A-type stars",Astronomy and Astrophysics ,475 (2):677– 684,Bibcode :2007A&A...475..677S ,doi :10.1051/0004-6361:20077429 ^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 . ^a b c Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?",Astronomy & Astrophysics ,542 : A116,arXiv :1204.2459 Bibcode :2012A&A...542A.116A ,doi :10.1051/0004-6361/201118724 ,S2CID 53666672 . ^a b c d e David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets",The Astrophysical Journal ,804 (2): 146,arXiv :1501.03154 Bibcode :2015ApJ...804..146D ,doi :10.1088/0004-637X/804/2/146 ,S2CID 33401607 . ^a b c d e Zuckerman, B.; et al. (May 2011), "The Tucana/Horologium, Columba, AB Doradus, and Argus Associations: New Members and Dusty Debris Disks",The Astrophysical Journal ,732 (2): 61,arXiv :1104.0284v1 Bibcode :2011ApJ...732...61Z ,doi :10.1088/0004-637X/732/2/61 ,S2CID 62797470 . ^a b Díaz, C. G.; et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum",Astronomy & Astrophysics ,531 : A143,arXiv :1012.4858 Bibcode :2011A&A...531A.143D ,doi :10.1051/0004-6361/201016386 ,S2CID 119286673 . ^ "HD 16754" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2019-12-16 .^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems",Monthly Notices of the Royal Astronomical Society 389 (2):869– 879,arXiv :0806.2878 Bibcode :2008MNRAS.389..869E ,doi :10.1111/j.1365-2966.2008.13596.x S2CID 14878976 . ^ Elliott, P.; et al. (May 2016), "Search for associations containing young stars (SACY). VII. New stellar and substellar candidate members in the young associations",Astronomy & Astrophysics ,590 : 28,arXiv :1604.03550 Bibcode :2016A&A...590A..13E ,doi :10.1051/0004-6361/201628253 ,S2CID 53138126 , A13. ^ Makarov, V. V.; Kaplan, G. H. (May 2005), "Statistical Constraints for Astrometric Binaries with Nonlinear Motion",The Astronomical Journal ,129 (5):2420– 2427,Bibcode :2005AJ....129.2420M ,doi :10.1086/429590 ^ Frankowski, A.; et al. (March 2007), "Proper-motion binaries in the Hipparcos catalogue. Comparison with radial velocity data",Astronomy and Astrophysics ,464 (1):377– 392,arXiv :astro-ph/0612449 Bibcode :2007A&A...464..377F ,doi :10.1051/0004-6361:20065526 ,S2CID 14010423 .
