Astronomy:Stein 2051
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Short description: Star in the constellation Camelopardalis
Coordinates: 
04h 31m 11.52059s, +58° 58′ 37.4806″
350px Image of Stein 2051 B and a background star taken by the Hubble Space Telescope.[1] Credit: NASA, ESA, and K. Sahu (STScI) | |
| Observation data {{#ifeq:J2000|J2000.0 (ICRS)|Epoch J2000.0 Equinox J2000.0 (ICRS)| [[History:Epoch|Epoch J2000]] [[Astronomy:Equinox (celestial coordinates)|Equinox J2000}} | |
|---|---|
| Constellation | Camelopardalis[2] |
| Stein 2051 A | |
| Right ascension | 04h 31m 11.5144s[3] |
| Declination | +58° 58′ 37.464″[3] |
| Apparent magnitude (V) | 10.98[4] |
| Stein 2051 B | |
| Right ascension | 04h 31m 12.5714s[5] |
| Declination | +58° 58′ 41.293″[5] |
| Apparent magnitude (V) | 12.43[6] |
| Characteristics | |
| Stein 2051 A | |
| Evolutionary stage | main sequence[7] |
| Spectral type | M4.0Ve[8] |
| U−B color index | +1.21[9] |
| B−V color index | +1.65[9] |
| Stein 2051 B | |
| Evolutionary stage | white dwarf[10] |
| Spectral type | DC5[11] |
| U−B color index | -0.53[9] |
| B−V color index | +0.31[9] |
| Astrometry | |
| Stein 2051 A | |
| Radial velocity (Rv) | +29[12] km/s |
| Proper motion (μ) | RA: +1,300.365[3] mas/yr Dec.: −2,046.106[3] mas/yr |
| Parallax (π) | 181.2438 ± 0.0499[3] mas |
| Distance | 17.995 ± 0.005 ly (5.517 ± 0.002 pc) |
| Absolute magnitude (MV) | +12.36[13] |
| Stein 2051 B | |
| Radial velocity (Rv) | +2.0[14] km/s |
| Proper motion (μ) | RA: +1,334.780±0.021[5] mas/yr Dec.: −1,947.638±0.019[5] mas/yr |
| Parallax (π) | 181.2730 ± 0.0203[5] mas |
| Distance | 17.993 ± 0.002 ly (5.5165 ± 0.0006 pc) |
| Absolute magnitude (MV) | +13.71[15] |
| Details[7] | |
| Stein 2051 A | |
| Mass | 0.252±0.013[16] M☉ |
| Radius | 0.292±0.031[16] R☉ |
| Luminosity | 0.0081[16] L☉ |
| Surface gravity (log g) | 4.80+0.13−0.10 cgs |
| Temperature | 3277+42−75 K |
| Metallicity [Fe/H] | 0.26+0.06−0.22 dex |
| Rotational velocity (v sin i) | 5.2+1.7−2.7 km/s |
| Stein 2051 B | |
| Mass | 0.675±0.051[10] M☉ |
| Radius | 0.0114±0.0004[10] R☉ |
| Temperature | 7122±181[10] K |
| Other designations | |
| Stein 2051 A: LHS 26, NLTT 13373, TYC 3744-412-1, 2MASS J04311147+585837, WISE J043113.20+585816.7[20] | |
| Stein 2051 B: EGGR 180, LHS 27, NLTT 13375, TYC 3744-2062-1, 2MASS J04311201+5858476, WD 0426+58, WD2 0426+585, WD3 0426+588[21] | |
| Database references | |
| SIMBAD | A |
| B | |
  Stein 2051 Location of Stein 2051 in the constellation Camelopardalis | |
Stein 2051 (Gliese 169.1, G 175-034, LHS 26/27) is a nearby binary star system, containing a red dwarf (component A) and a degenerate star (white dwarf) (component B), located in constellation Camelopardalis at about 18 ly from Earth.[19]
Stein 2051 is the nearest (red dwarf + white dwarf) separate binary system (40 Eridani BC is located closer at 16.26 light-years,[22] but it is a part of a triple star system).
Stein 2051 B is the 6th nearest white dwarf after Sirius B, Procyon B, van Maanen's star, LP 145-141 and 40 Eridani B.
Properties
The brighter of these two stars is A (a red dwarf), but the more massive is component B (a white dwarf).
In 2017, Stein 2051 B was observed passing in front of a more distant star. The bending of starlight by the gravitational field of the nearer star allowed its mass to be directly measured. The estimated mass of Stein 2051 B is 0.675±0.051 M☉, which fits the expected range of a white dwarf with a carbon-oxygen core.[10]
References
- ↑ "Einstein revisited". https://www.spacetelescope.org/images/potw1724a/.
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 3.0 3.1 3.2 3.3 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.
- ↑ Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)". Vizier Online Data Catalog. Bibcode: 2012yCat.1322....0Z.
- ↑ 5.0 5.1 5.2 5.3 5.4 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.
- ↑ Holberg, J. B.; Oswalt, T. D.; Sion, E. M.; McCook, G. P. (2016). "The 25 parsec local white dwarf population". Monthly Notices of the Royal Astronomical Society 462 (3): 2295. doi:10.1093/mnras/stw1357. Bibcode: 2016MNRAS.462.2295H.
- ↑ 7.0 7.1 Passegger, V. M.; Bello-García, A.; Ordieres-Meré, J.; Caballero, J. A.; Schweitzer, A.; González-Marcos, A.; Ribas, I.; Reiners, A. et al. (2020). "The CARMENES search for exoplanets around M dwarfs". Astronomy & Astrophysics 642: A22. doi:10.1051/0004-6361/202038787. Bibcode: 2020A&A...642A..22P.
- ↑ Lépine, Sébastien; Hilton, Eric J.; Mann, Andrew W.; Wilde, Matthew; Rojas-Ayala, Bárbara; Cruz, Kelle L.; Gaidos, Eric (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 9.2 9.3 Hardie, R. H. (1966). "UBV Photometry of the Lowell Proper Motion Object G175-34". Publications of the Astronomical Society of the Pacific 78 (462): 171. doi:10.1086/128321. Bibcode: 1966PASP...78..171H.
- ↑ 10.0 10.1 10.2 10.3 10.4 Sahu, Kailash C. et al. (June 2017). "Relativistic deflection of background starlight measures the mass of a nearby white dwarf star". Science 356 (6342): 1046–1050. doi:10.1126/science.aal2879. PMID 28592430. Bibcode: 2017Sci...356.1046S.
- ↑ Greenstein, J. L. (1984). "Spectrophotometry of the white dwarfs". The Astrophysical Journal 276: 602. doi:10.1086/161649. Bibcode: 1984ApJ...276..602G.
- ↑ Fouqué, Pascal; Moutou, Claire; Malo, Lison; Martioli, Eder; Lim, Olivia; Rajpurohit, Arvind; Artigau, Etienne; Delfosse, Xavier et al. (2018). "SPIRou Input Catalogue: Global properties of 440 M dwarfs observed with ESPaDOnS at CFHT". Monthly Notices of the Royal Astronomical Society 475 (2): 1960. doi:10.1093/mnras/stx3246. Bibcode: 2018MNRAS.475.1960F.
- ↑ Houdebine, Éric R.; Mullan, D. J.; Doyle, J. G.; de la Vieuville, Geoffroy; Butler, C. J.; Paletou, F. (2019). "The Mass-Activity Relationships in M and K Dwarfs. I. Stellar Parameters of Our Sample of M and K Dwarfs". The Astronomical Journal 158 (2): 56. doi:10.3847/1538-3881/ab23fe. Bibcode: 2019AJ....158...56H.
- ↑ Silvestri, Nicole M.; Oswalt, Terry D.; Hawley, Suzanne L. (2002). "Wide Binary Systems and the Nature of High-Velocity White Dwarfs". The Astronomical Journal 124 (2): 1118. doi:10.1086/341382. Bibcode: 2002AJ....124.1118S.
- ↑ Limoges, M. -M.; Bergeron, P.; Lépine, S. (2015). "Physical Properties of the Current Census of Northern White Dwarfs within 40 pc of the Sun". The Astrophysical Journal Supplement Series 219 (2): 19. doi:10.1088/0067-0049/219/2/19. Bibcode: 2015ApJS..219...19L.
- ↑ 16.0 16.1 16.2 Ghosh, Samrat; Ghosh, Supriyo; Das, Ramkrishna; Mondal, Soumen; Khata, Dhrimadri (2020). "Understanding the physical properties of young M dwarfs: NIR spectroscopic studies". Monthly Notices of the Royal Astronomical Society 493 (3): 4533–4550. doi:10.1093/mnras/staa427. Bibcode: 2020MNRAS.493.4533K.
- ↑ Perryman (1997). "HIP 21088". The Hipparcos and Tycho Catalogues. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-source=I/239/hip_main&HIP=21088.
- ↑ "Gl 169.1". Preliminary Version of the Third Catalogue of Nearby Stars. 1991. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-source=V/70A&Name=Gl%20169.1.
- ↑ 19.0 19.1 "GCTP 986.01". The General Catalogue of Trigonometric Stellar Parallaxes. 1995. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-source=I/238A/picat&GCTP=986.01.
- ↑ "NAME Stein 2051 A". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NAME+Stein+2051+A.
- ↑ "NAME Stein 2051 B". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NAME+Stein+2051+B.
- ↑ Perryman (1997). "HIP 19849". The Hipparcos and Tycho Catalogues. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-source=I/239/hip_main&HIP=19849.
External links
- "CCDM J04312+5858AB -- Double or multiple star". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=CCDM%20J04312%2B5858AB. (the whole system)
- "NAME STEIN 2051A -- Star in double system". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%40270532&Name=NAME%20STEIN%202051A. (component A)
- "GJ 169.1 B -- Star in double system". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%40270627&Name=GJ%20%20%20169.1%20B. (component B)
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