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Star in the constellation Aquarius
Tau1 Aquarii ,
Latinized from τ1 Aquarii, is the
Bayer designation for a single
[11]
star in the
equatorial
constellation of
Aquarius . With an
apparent visual magnitude of 5.66,
[2] it is a faint naked eye that
requires dark suburban skies for viewing.
Parallax measurements made during the
Hipparcos mission yield a distance estimate of roughly 355
light-years (109
parsecs ) from Earth.
[1] The star is drifting further away with a
radial velocity of +15 km/s.
[5] It is a candidate member of the
Pisces-Eridanus stellar stream .
[12]
The
stellar classification of τ1 Aquarii is B9 V;
[3] right along the borderline between a
B- and
A-type main sequence star . This is a candidate
silicon star ; a type of
Ap star of class
CP2 that shows a
magnetic field .
[13] It is around 100
[9] million years old and is spinning rapidly with a
projected rotational velocity of 185 km/s.
[7] The star has 2.7
[7] times the mass of the Sun and double the Sun's radius.
[8] It is radiating 63.5
[7] times the luminosity of the Sun from its
photosphere at an
effective temperature of 10,617 K.
[7] When examined in the infrared band, it displays an excess emission that is a characteristic of stars with an orbiting
debris disk . The model that best fits the data suggests there are two concentric
circumstellar disks .
[9]
References
^
a
b
c
d
e
f
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 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa , 27 : 11,
Bibcode :
1968MNSSA..27...11C .
^
a
b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars , vol. 4, Ann Arbor: Dept. of Astronomy, University of Michigan,
Bibcode :
1988mcts.book.....H .
^
a
b Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series , 34 : 1–49,
Bibcode :
1978A&AS...34....1N .
^
a
b Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Carnegie Institute Washington D.C. Publication , Carnegie Institution of Washington,
Bibcode :
1953GCRV..C......0W .
^ 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
d
e
f
g
h Zorec, J.; Royer, F. (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 ,
S2CID
55586789 .
^
a
b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics , 367 (2): 521–524,
arXiv :
astro-ph/0012289 ,
Bibcode :
2001A&A...367..521P ,
doi :
10.1051/0004-6361:20000451 ,
S2CID
425754 .
^
a
b
c Morales, Farisa Y.; et al. (April 2011),
"Common Warm Dust Temperatures Around Main-sequence Stars" (PDF) , The Astrophysical Journal Letters , 730 (2): L29,
Bibcode :
2011ApJ...730L..29M ,
doi :
10.1088/2041-8205/730/2/L29 ,
S2CID
2360696 .
^
"* tau01 Aqr" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 2012-07-03 .
^ 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 .
^ Curtis, Jason L.; et al. (August 2019), "TESS Reveals that the Nearby Pisces-Eridanus Stellar Stream is only 120 Myr Old", The Astronomical Journal , 158 (2): 11,
arXiv :
1905.10588 ,
Bibcode :
2019AJ....158...77C ,
doi :
10.3847/1538-3881/ab2899 ,
S2CID
166228270 , 77.
^ Wraight, K. T.; et al. (2012), "A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars★", Monthly Notices of the Royal Astronomical Society , 420 (1): 757–772,
arXiv :
1110.6283 ,
Bibcode :
2012MNRAS.420..757W ,
doi :
10.1111/j.1365-2966.2011.20090.x ,
S2CID
14811051 .
External links