49 Ceti

49 Ceti


Location of 49 Ceti (circled)

Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 01h 34m 37.77884s[1]
Declination −15° 40′ 34.8979″[1]
Apparent magnitude (V) 5.607[2]
Characteristics
Spectral type A1V[3]
U−B color index +0.05[4]
B−V color index +0.07[4]
Astrometry
Radial velocity (Rv)10.30 ± 0.7[5] km/s
Proper motion (μ) RA: 94.84[1] mas/yr
Dec.: -3.14[1] mas/yr
Parallax (π)16.84 ± 0.28[1] mas
Distance194 ± 3 ly
(59.4 ± 1.0 pc)
Details[6]
Mass2.02 M☉
Luminosity19.12 L☉
Temperature8,790 K
Rotational velocity (v sin i)196 km/s
Other designations
BD−16° 265, HD 9672, HIP 7345, HR 451, SAO 147886
Database references
SIMBADdata

49 Ceti is a star in the constellation of Cetus. Its apparent magnitude is 5.607.[2] It is 194 light-years, or 59.4 parsecs away from the Solar System, based on its parallax.[1]

49 Ceti is a young A-type main-sequence star.[3] It also displays a significant infrared excess, which is a characteristic of a debris disk surrounding the star. Unusually, the disk seems to be gas-rich, with evidence of carbon monoxide (CO) gas. This carbon monoxide gas may possibly be from comets orbiting the star within the disk, similar to the Kuiper Belt in the Solar System.[7]

49 Ceti has been identified as a member of the 40-million-year-old Argus Association.[7]

References

  1. 1 2 3 4 5 6 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357.
  2. 1 2 Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  3. 1 2 Roberge, A.; Kamp, I.; Montesinos, B.; Dent, W. R. F.; Meeus, G.; Donaldson, J. K.; Olofsson, J.; Moór, A.; Augereau, J.-C.; Howard, C.; Eiroa, C.; Thi, W.-F.; Ardila, D. R.; Sandell, G.; Woitke, P. (2013). "Herschel Observations of Gas and Dust in the Unusual 49 Ceti Debris Disk". The Astrophysical Journal. 771: 69. Bibcode:2013ApJ...771...69R. arXiv:1305.2894 Freely accessible. doi:10.1088/0004-637X/771/1/69.
  4. 1 2 Rybka, E. (1969). "The corrected magnitudes and colours of 278 stars near S.A. 1-139 in the UBV system". Acta Astronomica. 19: 229. Bibcode:1969AcA....19..229R.
  5. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. Bibcode:2006AstL...32..759G. arXiv:1606.08053 Freely accessible. doi:10.1134/S1063773706110065.
  6. ↑ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. Bibcode:2012A&A...537A.120Z. arXiv:1201.2052 Freely accessible. doi:10.1051/0004-6361/201117691.
  7. 1 2 Zuckerman, B.; Song, Inseok (2012). "A 40 Myr Old Gaseous Circumstellar Disk at 49 Ceti: Massive CO-Rich Comet Clouds at Young A-Type Stars". The Astrophysical Journal. 758 (2): 77. Bibcode:2012ApJ...758...77Z. arXiv:1207.1747 Freely accessible. doi:10.1088/0004-637X/758/2/77.


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