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]
| 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] |
| Distance | 59.09 ± 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] |
| Distance | 59.17 ± 0.05 ly (18.14 ± 0.01 pc) |
| Orbit[4] | |
| Primary | 2MASS J18450097–1409053 A |
| Companion | 2MASS J18450097–1409053 B |
| Period (P) | 586 yr |
| Semi-major axis (a) | 3.224±0.016" (52 AU) |
| Details[4] | |
| 2MASS J18450079–1409036 | |
| Mass | 0.2 M☉ |
| 2MASS J18450097–1409053 | |
| Mass | 0.2 M☉ |
| Surface gravity (log g) | 4.50±0.05[5] cgs |
| Temperature | 3000±23[5] K |
| Metallicity [Fe/H] | -0.25±0.2[5] dex |
| Age | 40±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 | |
| SIMBAD | 2MASS J18450079–1409036 |
| 2MASS J18450097–1409053 | |
2MASS J18450079–1409036 and 2MASS J18450097-1409053 appear to be a common proper motion pair,[8] confirmed to be bound in 2016.[4]
References
edit- ^ a b c 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.
- ^ a b c 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
- ^ a b c 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.
- ^ a b c 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
- ^ a b c "The PASTEL catalogue : B/pastel". Archived from the original on 2021-05-26. Retrieved 2021-05-26.
- ^ 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.
- ^ [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]
- ^ 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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