Astronomy:YZ Canis Minoris
Coordinates: 07h 44m 40.17262s, +03° 33′ 08.8778″
![]() A light curve for YZ Canis Minoris from TESS data, adapted from Maehara et al.(2021).[1] The main plot shows both the periodic brightness variation and several flares. The inset plot shows the strongest flare with an expanded time scale. | |
Observation data Equinox J2000.0]] (ICRS) | |
---|---|
Constellation | Canis Minor |
Right ascension | 07h 44m 40.17230s[2] |
Declination | +03° 33′ 08.8752″[2] |
Apparent magnitude (V) | 11.15[3] |
Characteristics | |
Spectral type | M5 V[4] |
B−V color index | 1.61[3] |
Astrometry | |
Radial velocity (Rv) | +26.53±0.30[5] km/s |
Proper motion (μ) | RA: −347.782[2] mas/yr Dec.: −445.702[2] mas/yr |
Parallax (π) | 166.9769 ± 0.0343[2] mas |
Distance | 19.533 ± 0.004 ly (5.989 ± 0.001 pc) |
Absolute magnitude (MV) | 12.32[6] |
Details | |
Mass | 0.308[7] M☉ |
Radius | 0.324[7] R☉ |
Luminosity | 0.012[2] L☉ |
Surface gravity (log g) | 5.0[8] cgs |
Temperature | 3,125±61[9] K |
Metallicity [Fe/H] | −0.26±0.08[9] dex |
Rotation | 2.8[7] days |
Rotational velocity (v sin i) | 4.0[10] km/s |
Age | 49[11] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Location of YZ Canis Minoris in the constellation Canis Minor |
YZ Canis Minoris is a red-hued star in the equatorial constellation of Canis Minor. With an apparent visual magnitude of 11.15,[3] it is much too faint to be viewed with the naked eye. The distance to YZ CMi can be estimated from its annual parallax shift of 167 mas, yielding a value of 19.5 light years. Presently the star is moving further away with a heliocentric radial velocity of +26.5 km/s.[5] It made its closest approach some 162,000 years ago when it made perihelion passage at a distance of 10.2 ly.[13] YZ CMi is a potential member of the Beta Pictoris moving group.[14]
This is a red dwarf star, or M-type main-sequence star, with a stellar classification of M5 V.[4] It is a flare star, so called due to its stellar flares being more powerful than those of Earth's star, and is roughly three times the size of Jupiter.[15] The radio emission from the star is in a 50 mHz bandwidth and is centered on 1464.9 mHz.[16] The X-ray surface flux is 2.73×106 erg s−1 cm−2. It has a coronal temperature of 5.79 MK.[17]
References
- ↑ Maehara, Hiroyuki; Notsu, Yuta; Namekata, Kousuke; Honda, Satoshi; Kowalski, Adam F.; Katoh, Noriyuki; Ohshima, Tomohito; Iida, Kota et al. (February 2021). "Time-resolved spectroscopy and photometry of M dwarf flare star YZ Canis Minoris with OISTER and TESS: Blue asymmetry in the Hα line during the non-white light flare". Publications of the Astronomical Society of Japan 73 (1): 44–65. doi:10.1093/pasj/psaa098. Bibcode: 2021PASJ...73...44M.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Astudillo-Defru, N. et al. (April 2017). "Magnetic activity in the HARPS M dwarf sample. The rotation-activity relationship for very low-mass stars through R'(HK)". Astronomy & Astrophysics 600: 15. doi:10.1051/0004-6361/201527078. A13. Bibcode: 2017A&A...600A..13A.
- ↑ 4.0 4.1 West, Andrew A. et al. (October 2015). "An Activity-Rotation Relationship and Kinematic Analysis of Nearby Mid-to-Late-Type M Dwarfs". The Astrophysical Journal 812 (1): 12. doi:10.1088/0004-637X/812/1/3. 3. Bibcode: 2015ApJ...812....3W.
- ↑ 5.0 5.1 Nidever, David L. et al. (August 2002). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series 141 (2): 503–522. doi:10.1086/340570. Bibcode: 2002ApJS..141..503N.
- ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 7.0 7.1 7.2 Newton, Elisabeth R. et al. (January 2017). "The Hα Emission of Nearby M Dwarfs and its Relation to Stellar Rotation". The Astrophysical Journal 834 (1): 13. doi:10.3847/1538-4357/834/1/85. 85. Bibcode: 2017ApJ...834...85N.
- ↑ Lépine, Sébastien et al. (2013). "A Spectroscopic Catalog of the Brightest (J < 9) M Dwarfs in the Northern Sky". The Astronomical Journal 145 (4): 102. doi:10.1088/0004-6256/145/4/102. Bibcode: 2013AJ....145..102L.
- ↑ 9.0 9.1 Gaidos, Eric; Mann, Andrew W. (August 2014). "M dwarf metallicities and giant planet occurrence: ironing out uncertainties and systematics". The Astrophysical Journal 791 (1): 9. doi:10.1088/0004-637X/791/1/54. 54. Bibcode: 2014ApJ...791...54G.
- ↑ Reiners, Ansgar et al. (2018). "The CARMENES search for exoplanets around M dwarfs. High-resolution optical and near-infrared spectroscopy of 324 survey stars". Astronomy and Astrophysics 612: A49. doi:10.1051/0004-6361/201732054. Bibcode: 2018A&A...612A..49R.
- ↑ Meshkat, Tiffany et al. (December 2017). "A Direct Imaging Survey of Spitzer-detected Debris Disks: Occurrence of Giant Planets in Dusty Systems". The Astronomical Journal 154 (6): 21. doi:10.3847/1538-3881/aa8e9a. 245. Bibcode: 2017AJ....154..245M.
- ↑ "YZ CMi". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=YZ+CMi.
- ↑ Bailer-Jones, C. A. L. (March 2015). "Close encounters of the stellar kind". Astronomy & Astrophysics 575: 13. doi:10.1051/0004-6361/201425221. A35. Bibcode: 2015A&A...575A..35B.
- ↑ Nakajima, Tadashi; Morino, Jun-Ichi (January 2012). "Potential Members of Stellar Kinematic Groups within 30 pc of the Sun". The Astronomical Journal 143 (1): 2. doi:10.1088/0004-6256/143/1/2. Bibcode: 2012AJ....143....2N.
- ↑ "First flares on a distant star". New Scientist: 305. February 4, 1982. https://books.google.com/books?id=XQwcxTIERmUC&pg=PA305.
- ↑ Lang, K. R. (October 23–27, 1989). "Flare stars at radio wavelengths". in Mirzoyan, L.V.. Byurakan (Armenia), U.S.S.R.: Springer. 1990. pp. 127–130. ISBN 978-0-7923-0771-6.
- ↑ Johnstone, C. P.; Güdel, M. (June 2015), "The coronal temperatures of low-mass main-sequence stars", Astronomy & Astrophysics 578: 4, doi:10.1051/0004-6361/201425283, A129, Bibcode: 2015A&A...578A.129J
![]() | Original source: https://en.wikipedia.org/wiki/YZ Canis Minoris.
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