From Wikipedia, the free encyclopedia
Binary or triple star system in the constellation Eridanus
This article is about s Eridani. For S Eridani, see
64 Eridani .
HD 16754 is a
binary
[11] or triple-star
[8] system in the
constellation
Eridanus . It has the
Bayer designation s Eridani ; HD 16754 is the designation from the
Henry Draper catalogue . The system is visible to the naked eye as a faint point of light with an
apparent visual magnitude of +4.74.
[2] It is located at a distance of approximately 132
light years from the
Sun based on
parallax ,
[1] and is drifting further away with a
radial velocity of +18 km/s.
[2] The system is a member of the
Columba association of co-moving stars.
[12]
This object was flagged as an
astrometric binary based on proper motion measurements made from the
Hipparcos spacecraft.
[13]
[14] Zuckerman et al. (2011) consider it a multi-star system, with a bright
A-type primary plus a faint M-type companion at an
angular separation of 25
″ to the north. The astrometric companion to the primary remains unresolved.
[8]
The main component is an
A-type main-sequence star with a
stellar classification of A1 Vb.
[3] Based upon stellar models, it has an age estimated at 212 million years.
[7] Consistency with its membership in the Columba association suggests a much younger age of 30 million years.
[8] Earlier measurements showed a high
projected rotational velocity of 168 km/s.
[9] However, Ammler-von Eiff and Reiners (2012) found a much lower velocity of 13 km/s.
[6]
The visible companion is a
red dwarf star with a class in the range M2-5V. The system is a source of
X-ray emission with a luminosity of 924× 1020
W , which is most likely coming from this component and the unresolved companion.
[4]
References
^
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 at
VizieR .
^
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 . Retrieved 2019-12-16 .
^ 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 .