DX Cancri
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h29m49.345s[2] |
| Declination | +26° 46′ 33.74″[2] |
| Apparent magnitude(V) | 14.81[3] |
| Characteristics | |
| Spectral type | M6.5V[4] |
| Apparent magnitude(J) | 8.2[3] |
| U−Bcolor index | +2.11[5] |
| B−Vcolor index | +2.08[5] |
| Variable type | Flare star[3] |
| Astrometry | |
| Radial velocity(Rv) | +9.0[6]km/s |
| Proper motion(μ) | RA:−1,140[2]mas/yr Dec.:−602[2]mas/yr |
| Parallax(π) | 279.2496 ± 0.0637mas[7] |
| Distance | 11.680 ± 0.003ly (3.5810 ± 0.0008pc) |
| Absolute magnitude(MV) | 16.98[8] |
| Details | |
| Mass | 0.106±0.009[9]M☉ |
| Radius | 0.1235±0.0006[9]R☉ |
| Luminosity | 0.00073±0.000007[9]L☉ |
| Surface gravity(logg) | ~5[9]cgs |
| Temperature | 2,840[10]K |
| Rotation | 0.46 days[11] |
| Rotational velocity(vsini) | 11.0[12]km/s |
| Age | 200[13]Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
  DX Location of DX Cancri in the constellationCancer | |
DX Cancriis avariable starin the northernzodiacconstellationofCancer.With anapparent visual magnitudeof 14.81,[3]it is much too faint to be seen with thenaked eye.Visually viewing this star requires atelescopewith a minimumapertureof 16 in (41 cm).[14]Based uponparallaxmeasurements, DX Cancri is located at a distance of 11.8light-years(3.6parsecs) from Earth. This makes it the 18th closest star (orstar system) to the Sun.
The star has astellar classificationof M6.5V,[4]identifying it as a type ofmain sequencestar known as ared dwarf.It has about 10% of the mass of the Sun, and 12% of the Sun's radius.[9]Theouter envelopeof the star has aneffective temperatureof 2,840 K,[10]making it anM-type star.It is aflare starthat has random, intermittent increases in brightness by up to a factor of five. It is a proposed member of theCastor Moving Groupof stars that share a common trajectory through space. This group has an estimated age of 200 million years.[15]
See also
[edit]References
[edit]- ^Pettersen, B. R. (February 1981)."Discovery of flare activity on the very low luminosity red dwarf G 51-15".Astronomy & Astrophysics.95:135–137.Bibcode:1981A&A....95..135P.Retrieved11 November2021.
- ^abcdZacharias, N.; et al. (2003)."The Second U.S. Naval Observatory CCD Astrograph Catalog (UCAC2)".VizieR Online Data Catalog.CDS/ADC Collection of Electronic Catalogues, 1289, 0 (2003).Bibcode:2003yCat.1289....0Z.Retrieved2010-06-29.
- ^abcde"V* DX Cnc -- Flare Star".SIMBAD.Centre de Données astronomiques de Strasbourg.Retrieved2010-06-29.
- ^abLuhman, Kevin L.; Allers, Katelyn N.; Jaffe, Daniel T.; Cushing, Michael C.; Williams, Kurtis A.; Slesnick, Catherine L.; Vacca, William D. (April 2007), "Ophiuchus 1622-2405: Not a Planetary-Mass Binary",The Astrophysical Journal,659(2): 1629–1636,arXiv:astro-ph/0701242,Bibcode:2007ApJ...659.1629L,doi:10.1086/512539,S2CID11153196
- ^abWeistrop, D. (August 1981). "The nature of the Giclas +4 stars".Astronomical Journal.86:1220–1227.Bibcode:1981AJ.....86.1220W.doi:10.1086/113001.
- ^Montes, D.; et al. (November 2001)."Late-type members of young stellar kinematic groups - I. Single stars".Monthly Notices of the Royal Astronomical Society.328(1): 45–63.arXiv:astro-ph/0106537.Bibcode:2001MNRAS.328...45M.doi:10.1046/j.1365-8711.2001.04781.x.S2CID55727428.
- ^Brown, A. G. A.;et al. (Gaia collaboration) (2021)."GaiaEarly Data Release 3: Summary of the contents and survey properties ".Astronomy & Astrophysics.649:A1.arXiv:2012.01533.Bibcode:2021A&A...649A...1G.doi:10.1051/0004-6361/202039657.S2CID227254300.(Erratum:doi:10.1051/0004-6361/202039657e).Gaia EDR3 record for this sourceatVizieR.
- ^"The One Hundred Nearest Star Systems".RECONS.Georgia State University.January 1, 2009.Retrieved2010-06-29.
- ^abcdeCifuentes, C.; Caballero, J. A.; Cortés-Contreras, M.; Montes, D.; Abellán, F. J.; Dorda, R.; Holgado, G.; Zapatero Osorio, M. R.; Morales, J. C.; Amado, P. J.; Passegger, V. M.; Quirrenbach, A.; Reiners, A.; Ribas, I.; Sanz-Forcada, J. (2020-10-01), "CARMENES input catalogue of M dwarfs. V. Luminosities, colours, and spectral energy distributions",Astronomy and Astrophysics,642:A115,arXiv:2007.15077,Bibcode:2020A&A...642A.115C,doi:10.1051/0004-6361/202038295,ISSN0004-6361
- ^abReiners, Ansgar; Basri, Gibor (February 2007). "The First Direct Measurements of Surface Magnetic Fields on Very Low Mass Stars".The Astrophysical Journal.656(2): 1121–1135.arXiv:astro-ph/0610365.Bibcode:2007ApJ...656.1121R.doi:10.1086/510304.S2CID17743657.
- ^Morin, J.; et al. (October 2010), "Large-scale magnetic topologies of late M dwarfs",Monthly Notices of the Royal Astronomical Society,407(4): 2269–2286,arXiv:1005.5552,Bibcode:2010MNRAS.407.2269M,doi:10.1111/j.1365-2966.2010.17101.x,S2CID119192200
- ^Jenkins, J. S.; et al. (October 2009). "Rotational Velocities for M Dwarfs".The Astrophysical Journal.704(2): 975–988.arXiv:0908.4092.Bibcode:2009ApJ...704..975J.doi:10.1088/0004-637X/704/2/975.S2CID119203469.
- ^Lestrade, J.-F.; et al. (November 2009), "Search for cold debris disks around M-dwarfs. II",Astronomy and Astrophysics,506(3): 1455–1467,arXiv:0907.4782,Bibcode:2009A&A...506.1455L,doi:10.1051/0004-6361/200912306,S2CID17035185
- ^Sherrod, P. Clay; Koed, Thomas L. (2003),A Complete Manual of Amateur Astronomy: Tools and Techniques for Astronomical Observations,Astronomy Series,Courier Dover Publications,p. 9,ISBN0486428206
- ^Lestrade, J.-F.; et al. (December 2006), "Search for cold debris disks around M-dwarfs",Astronomy and Astrophysics,460(3): 733–741,arXiv:astro-ph/0609574,Bibcode:2006A&A...460..733L,doi:10.1051/0004-6361:20065873,S2CID119328045
Further reading
[edit]- Dittmann, Jason A.; Irwin, Jonathan M.; Charbonneau, David; Berta-Thompson, Zachory K. (2014). "Trigonometric Parallaxes for 1507 Nearby Mid-to-late M Dwarfs".The Astrophysical Journal.784(2): 156.arXiv:1312.3241.Bibcode:2014ApJ...784..156D.doi:10.1088/0004-637X/784/2/156.S2CID18789867.Table with parallaxes.
