DX Cancri

	DX Cancri
Observationsdata; Epok: J2000.0
Stjärnbild	Kräftan
Rektascension	08t 29m 49,345 s
Deklination	+26° 46′ 33,74 ″
Skenbar magnitud ()	+14,81
Stjärntyp
Spektraltyp	M6.5 V
U–B	+2,11
B–V	+2,08
Variabeltyp	Flarestjärna
Astrometri
Radialhastighet ()	+9,0 km/s
Egenrörelse (µ)	RA: -1 140 mas/år; Dek.: -602 mas/år
Parallax ()	279,2496 ± 0,0637
Avstånd	11,680 ± 0,003 lå (3,5810 ± 0,0008 pc)
Absolut magnitud ()	+16,98
Detaljer
Massa	0,09 M☉
Radie	0,11 R☉
Luminositet	0,00065 L☉
Temperatur	2 840 K
Vinkelhastighet	11,0 km/s
Ålder	200 miljoner år
Andra beteckningar
	UCAC2 41191231, AP J08294949+2646348, G 51-15, GJ 1111, LHS 248, LSPM J0829+2646, 2MASS J08294949+2646348, NLTT 19635, UCAC4 584-042341, USNO-B1.0 1167-00167383, DX Cancri, [GKL99] 181, Gaia DR3 703790044252850688, Gaia DR2 703790044252850688

DX Cancri är en ensam stjärna i mellersta delen av stjärnbilden Kräftan. Den har en skenbar magnitud av ca 14,81 och kräver minst ett 16-tums teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 3 på ca 279,2 mas, beräknas den befinna sig på ett avstånd på ca 11,7 ljusår (ca 3,6 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 9 km/s. Stjärnan antas ingå i rörelsegruppen Castor av stjärnor med gemensam egenrörelse genom rymden. Gruppen uppskattas ha en ålder av 200 miljoner år.

Egenskaper

DX Cancri är en röd dvärgstjärna i huvudserien av spektralklass M6.5 V. Den har en massa som är ca 0,09 solmassa, en radie som är ca 0,11 solradie och har ca 0,00065 gånger solens utstrålning av energi från dess fotosfär vid en effektiv temperatur av ca 2 800 K.

DX Cancri är en flarestjärna med slumpvisa ökningar i ljusstyrka med upp till en faktor fem.

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, DX Cancri, 8 november 2022.

Noter

1 2 3 4 5 Zacharias, 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. Hämtad 2010-06-29.
1 2 3 4 "V* DX Cnc -- Flare Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Hämtad 2010-06-29.
1 2 Luhman, 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, S2CID 11153196
1 2 Weistrop, D. (August 1981). "The nature of the Giclas +4 stars". Astronomical Journal. 86: 1220–1227. Bibcode:1981AJ.....86.1220W. doi:10.1086/113001.
1 2 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. S2CID 55727428.
1 2 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early 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. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
1 2 3 "The One Hundred Nearest Star Systems". RECONS. Georgia State University. January 1, 2009. Hämtad 2010-06-29.
1 2 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, S2CID 119192200
1 2 Vidotto, A. A.; et al. (July 2013). "Effects of M dwarf magnetic fields on potentially habitable planets". Astronomy & Astrophysics. 557: A67. arXiv:1306.4789. Bibcode:2013A&A...557A..67V. doi:10.1051/0004-6361/201321504. S2CID 44335981.
1 2 Reiners, 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. S2CID 17743657.
↑ 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. S2CID 119203469.
↑ 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, S2CID 17035185
↑ V* DX Cnc (unistra.fr). Hämtad 2023-02-21.
↑ 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, ISBN 0486428206
↑ 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, S2CID 119328045
↑ Pettersen, B. R. (February 1981). "Discovery of flare activity on the very low luminosity red dwarf G 51-15". Astronomy & Astrophysics. 95: 135–137. Hämtad 11 november 2021.

Vidare läsning

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): sid. 156. doi:10.1088/0004-637X/784/2/156. https://arxiv.org/abs/1312.3241. Tabell med parallaxer.

Externa länkar

[B-1] 1 2 3 4 5 Zacharias, 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. Hämtad 2010-06-29.

[C-2] 1 2 3 4 "V* DX Cnc -- Flare Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Hämtad 2010-06-29.

[D-3] 1 2 Luhman, 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, S2CID 11153196

[E-4] 1 2 Weistrop, D. (August 1981). "The nature of the Giclas +4 stars". Astronomical Journal. 86: 1220–1227. Bibcode:1981AJ.....86.1220W. doi:10.1086/113001.

[F-5] 1 2 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. S2CID 55727428.

[G-6] 1 2 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early 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. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[H-7] 1 2 3 "The One Hundred Nearest Star Systems". RECONS. Georgia State University. January 1, 2009. Hämtad 2010-06-29.

[I-8] 1 2 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, S2CID 119192200

[J-9] 1 2 Vidotto, A. A.; et al. (July 2013). "Effects of M dwarf magnetic fields on potentially habitable planets". Astronomy & Astrophysics. 557: A67. arXiv:1306.4789. Bibcode:2013A&A...557A..67V. doi:10.1051/0004-6361/201321504. S2CID 44335981.

[K-10] 1 2 Reiners, 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. S2CID 17743657.

[L-11] 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. S2CID 119203469.

[M-12] 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, S2CID 17035185

[SIMBAD-13] V* DX Cnc (unistra.fr). Hämtad 2023-02-21.

[N-14] 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, ISBN 0486428206

[O-15] 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, S2CID 119328045

[A-16] Pettersen, B. R. (February 1981). "Discovery of flare activity on the very low luminosity red dwarf G 51-15". Astronomy & Astrophysics. 95: 135–137. Hämtad 11 november 2021.