2MASS J18450079–1409036 / 2MASS J18450097–1409053
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scutum
Right ascension 18h 45m 00.79s
Declination –14° 09′ 03.6″
Apparent magnitude (V) 13.221
Characteristics
Spectral type M5 / M5
Astrometry
Gaia EDR3 4105057482987021184
Proper motion (μ) RA: 47.53±0.04 mas/yr[1]
Dec.: -85.95±0.03 mas/yr[1]
Parallax (π)55.2002 ± 0.0422 mas[1]
Distance59.09 ± 0.05 ly
(18.12 ± 0.01 pc)
Gaia EDR3 4105057482994688384
Radial velocity (Rv)-23.0±0.3[2] km/s
Proper motion (μ) RA: 33.48±0.04 mas/yr[3]
Dec.: -91.47±0.03 mas/yr[3]
Parallax (π)55.1253 ± 0.0443 mas[3]
Distance59.17 ± 0.05 ly
(18.14 ± 0.01 pc)
Orbit[4]
Primary2MASS J18450097–1409053 A
Companion2MASS J18450097–1409053 B
Period (P)586 yr
Semi-major axis (a)3.224±0.016"
(52 AU)
Details[4]
2MASS J18450079–1409036
Mass0.2 M☉
2MASS J18450097–1409053
Mass0.2 M☉
Surface gravity (log g)4.50±0.05[5] cgs
Temperature3000±23[5] K
Metallicity [Fe/H]-0.25±0.2[5] dex
Age40±10[2] Myr
Other designations
2MASS J18450097–1409053AB
2MASS J18450097–1409053A: UCAC3 152-2811762, UCAC4 380-128133, 2MASS J18450079–1409036
2MASS J18450097–1409053B: UCAC3 152-281185, UCAC4 380-128136, 2MASS J18450097-1409053
Database references
SIMBAD2MASS J18450079–1409036
2MASS J18450097–1409053

2MASS J18450079–1409036 and 2MASS J18450097–1409053 is a system of two red dwarf stars both of which have spectral types of M5,[6] with projected separation of 3.2 seconds of arc.[7] The system is located in the constellation Scutum. The Gaia parallaxes place the system at 18.2 parsecs (59 light-years) from Earth.[1][3] Kinematically, it belongs to young (30-50 million years) Argus association.[2]

Proper motion

2MASS J18450079–1409036 and 2MASS J18450097-1409053 appear to be a common proper motion pair,[8] confirmed to be bound in 2016.[4]

References

  1. 1 2 3 4 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.
  2. 1 2 3 Binks, A. S.; Jeffries, R. D. (2016), "A WISE-based search for debris discs amongst M dwarfs in nearby, young, moving groups", Monthly Notices of the Royal Astronomical Society, 469: 579–593, arXiv:1611.07416, doi:10.1093/mnras/stx838
  3. 1 2 3 4 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.
  4. 1 2 3 Janson, Markus; Durkan, Stephen; Hippler, Stefan; Dai, Xiaolin; Brandner, Wolfgang; Schlieder, Joshua; Bonnefoy, Mickaël; Henning, Thomas (2016), "Binaries among low-mass stars in nearby young moving groups", Astronomy & Astrophysics, 599: A70, arXiv:1612.02443, doi:10.1051/0004-6361/201629945, S2CID 32267273
  5. 1 2 3 "The PASTEL catalogue : B/pastel". Archived from the original on 2021-05-26. Retrieved 2021-05-26.
  6. ↑ Riaz, Basmah; Gizis, John E.; Harvin, James (2006). "Identification of New M Dwarfs in the Solar Neighborhood". The Astronomical Journal. 132 (2): 866–872. arXiv:astro-ph/0606617. Bibcode:2006AJ....132..866R. doi:10.1086/505632. S2CID 6282011. Table 1.
  7. ↑ [HAZMAT. III. The UV Evolution of Mid- to Late-M Stars with GALEX HAZMAT. III. The UV Evolution of Mid- to Late-M Stars with GALEX, Table: Target Sample GALEX Photometry]
  8. ↑ Kirkpatrick, J. Davy; Gelino, Christopher R.; Cushing, Michael C.; Mace, Gregory N.; Griffith, Roger L.; Skrutskie, Michael F.; Marsh, Kenneth A.; Wright, Edward L.; Eisenhardt, Peter R.; McLean, Ian S.; Mainzer, Amy K.; Burgasser, Adam J.; Tinney, Chris G.; Parker, Stephen; Salter, Graeme (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function". The Astrophysical Journal. 753 (2): 156. arXiv:1205.2122. Bibcode:2012ApJ...753..156K. doi:10.1088/0004-637X/753/2/156. S2CID 119279752.


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