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Star in the constellation Camelopardalis
HD 26764 , also known as HR 1314 or rarely 14 H. Camelopardalis , is a solitary white hued
star
[17] located in the northern
circumpolar constellation
Camelopardalis . It has an
apparent magnitude of 5.19, making it faintly to the
naked eye if viewed under
good conditions .
Gaia DR3
parallax measurements place the object at a distance of 266
light years
[1] and is drifting closer with a poorly constrained heliocentric
radial velocity of 3
km/s .
[7] At its current distance, HD 26764's brightness is diminished by 0.26
magnitudes due to
interstellar dust .
[18]
HD 26764 has a
stellar classification of either A2 Vn or A1 Vn.
[4]
[5] Both classes indicate that the object is an
A-type main-sequence star with broad (nebulous)
absorption lines due to rapid rotation. At present it has 2.74 times the
mass of the Sun
[3] and 3.4 times the
Sun's radius .
[9] It radiates 94 times the
luminosity of the Sun
[3] from its photosphere at an
effective temperature of 9,825
K .
[11] At the age of 388
million years ,
[11] HD 26764 is a rather evolved dwarf star, having completed 91.2% of its
main sequence lifetime.
[3] Like many hot stars, it spins rapidly with a
projected rotational velocity of 205
km/s .
[13]
[14] An
X-ray emission with a
luminosity of 498.5× 1020
W has been detected around the star.
A-type stars are not expected to produce X-rays, so it must be coming from an unseen companion.
[19]
References
^
a
b
c
d
e 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 .
^ 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 .
^
a
b
c
d
e
f Zorec, J.; Royer, F. (January 2012).
"Rotational velocities of A-type stars IV: Evolution of rotational velocities" . Astronomy & Astrophysics . 537 : A120.
arXiv :
1201.2052 .
Bibcode :
2012A&A...537A.120Z .
doi :
10.1051/0004-6361/201117691 .
eISSN
1432-0746 .
ISSN
0004-6361 .
S2CID
55586789 .
^
a
b Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (April 1969). "A study of the bright stars. I. A catalogue of spectral classifications". The Astronomical Journal . 74 : 375.
Bibcode :
1969AJ.....74..375C .
doi :
10.1086/110819 .
ISSN
0004-6256 .
^
a
b Abt, Helmut A.; Morrell, Nidia I. (July 1995).
"The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars" . The Astrophysical Journal Supplement Series . 99 : 135.
Bibcode :
1995ApJS...99..135A .
doi :
10.1086/192182 .
ISSN
0067-0049 .
^ Häggkvist, L.; Oja, T. (1966). "Photoelectric photometry of bright stars". Arkiv för Astronomi . 4 : 137–163.
Bibcode :
1966ArA.....4..137H .
ISSN
0004-2048 .
^
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 .
eISSN
1562-6873 .
ISSN
1063-7737 .
S2CID
119231169 .
^ 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 .
^
a
b Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004).
"The angular sizes of dwarf stars and subgiants" . Astronomy & Astrophysics . 426 (1): 297–307.
arXiv :
astro-ph/0404180 .
Bibcode :
2004A&A...426..297K .
doi :
10.1051/0004-6361:20035930 .
eISSN
1432-0746 .
ISSN
0004-6361 .
^ Stassun, Keivan G.; et al. (9 September 2019).
"The Revised TESS Input Catalog and Candidate Target List" . The Astronomical Journal . 158 (4): 138.
arXiv :
1905.10694 .
Bibcode :
2019AJ....158..138S .
doi :
10.3847/1538-3881/ab3467 .
eISSN
1538-3881 .
hdl :
1721.1/124721 .
S2CID
166227927 .
^
a
b
c
d David, Trevor J.; Hillenbrand, Lynne A. (12 May 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 .
eISSN
1538-4357 .
^ Gebran, M.; Farah, W.; Paletou, F.; Monier, R.; Watson, V. (18 April 2016).
"A new method for the inversion of atmospheric parameters of A/Am stars" . Astronomy & Astrophysics . 589 : A83.
arXiv :
1603.01146 .
Bibcode :
2016A&A...589A..83G .
doi :
10.1051/0004-6361/201528052 .
eISSN
1432-0746 .
ISSN
0004-6361 .
^
a
b Huang, Su-Shu (September 1953).
"A Statistical Study of the Rotation of the Stars" . The Astrophysical Journal . 118 : 285.
Bibcode :
1953ApJ...118..285H .
doi :
10.1086/145751 .
eISSN
1538-4357 .
ISSN
0004-637X .
^
a
b Palmer, D. R.; Walker, E. N.; Jones, D. H. P.; Wallis, R. E. (1968). "The radial velocities spectral types and projected rotational velocities of 633 bright northern A stars". Royal Greenwich Observatory Bulletins . 135 : 385.
Bibcode :
1968RGOB..135..385P .
^ Verbunt, F.; van Gent, R. H. (June 2010).
"The star catalogue of Hevelius" . Astronomy and Astrophysics . 516 : A29.
Bibcode :
2010A&A...516A..29V .
doi :
10.1051/0004-6361/201014003 .
eISSN
1432-0746 .
ISSN
0004-6361 .
^
"HD 26764" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved December 13, 2022 .
^ Eggleton, P. P.; Tokovinin, A. A. (11 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 .
eISSN
1365-2966 .
ISSN
0035-8711 .
^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017).
"Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars" . Monthly Notices of the Royal Astronomical Society . 472 (4): 3805–3820.
arXiv :
1709.01160 .
Bibcode :
2017MNRAS.472.3805G .
doi :
10.1093/mnras/stx2219 .
eISSN
1365-2966 .
ISSN
0035-8711 .
^ Schröder, C.; Schmitt, J. H. M. M. (24 September 2007).
"X-ray emission from A-type stars" . Astronomy & Astrophysics . 475 (2): 677–684.
Bibcode :
2007A&A...475..677S .
doi :
10.1051/0004-6361:20077429 .
eISSN
1432-0746 .
ISSN
0004-6361 .