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This article is about b Cancri. Not to be confused with
β Cancri .
Star in the constellation Cancer
49 Cancri is a single star
[10] in the
zodiac
constellation of
Cancer , located 501
light years away from the Sun. It has the
Bayer designation b Cancri ; 49 Cancri is the
Flamsteed designation . It is visible to the naked eye as a faint star with an
apparent visual magnitude of about 5.6. It is moving away from the Earth with a heliocentric
radial velocity of +27.5 km/s.
A
light curve for BI Cancri, plotted from
TESS data
[11]
49 Cancri is a
variable star . Its brightness changes from magnitude 5.58 to 5.71 every seven days. It is classified as an
α2 Canum Venaticorum variable , a class of magnetic
chemically peculiar stars. The brightness changes are thought to correspond to the rotation of the star. 49 Cancri is classified from its spectrum as an
Ap star , with enhanced lines of silicon, europium, and chromium.
[12] Additionally, calcium and magnesium lines are described as weaker than normal.
[3]
49 Cancri is
classified as an A1
main sequence star.
[3] It has three times the
mass of the Sun , an
effective temperature of 10,615
K , and a radius of 2.9
R ☉ .
[6] It radiates about a hundred times the
luminosity of the Sun due to its high temperature and large size.
[7]
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 .
^
a
b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S . 1 : B/gcvs.
Bibcode :
2009yCat....102025S .
^
a
b
c Abt, Helmut A.; Morrell, Nidia I. (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 .
^
a
b 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 .
^ Gontcharov, G. A. (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 .
S2CID
119231169 .
^
a
b
c
d
e
f Huber, Daniel; Bryson, Stephen T.; Haas, Michael R.; Barclay, Thomas; Barentsen, Geert; Howell, Steve B.; Sharma, Sanjib; Stello, Dennis; Thompson, Susan E. (2016).
"The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8" . The Astrophysical Journal Supplement Series . 224 (1): 2.
arXiv :
1512.02643 .
Bibcode :
2016ApJS..224....2H .
doi :
10.3847/0067-0049/224/1/2 .
S2CID
118621218 .
^
a
b
c
d Netopil, Martin; Paunzen, Ernst; Hümmerich, Stefan; Bernhard, Klaus (2017). "An investigation of the rotational properties of magnetic chemically peculiar stars". Monthly Notices of the Royal Astronomical Society . 468 (3): 2745.
arXiv :
1703.05218 .
Bibcode :
2017MNRAS.468.2745N .
doi :
10.1093/mnras/stx674 .
S2CID
119215348 .
^ Kochukhov, O.; Bagnulo, S. (2006). "Evolutionary state of magnetic chemically peculiar stars". Astronomy and Astrophysics . 450 (2): 763.
arXiv :
astro-ph/0601461 .
Bibcode :
2006A&A...450..763K .
doi :
10.1051/0004-6361:20054596 .
S2CID
18596834 .
^
"49 Cnc" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 2019-07-29 .
^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society . 389 (2): 869.
arXiv :
0806.2878 .
Bibcode :
2008MNRAS.389..869E .
doi :
10.1111/j.1365-2966.2008.13596.x .
S2CID
14878976 .
^
"MAST: Barbara A. Mikulski Archive for Space Telescopes" . Space Telescope Science Institute. Retrieved 7 January 2023 .
^ Renson, P.; Manfroid, J. (2009).
"Catalogue of Ap, HGMN and Am stars" . Astronomy and Astrophysics . 498 (3): 961.
Bibcode :
2009A&A...498..961R .
doi :
10.1051/0004-6361/200810788 .