DS Tucanae

DS Tucanae

DS Tucanae imaged with the NTT. DS Tucanae A is on the right and DS Tucanae B is on the left.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Tucana
DS Tucanae A
Right ascension 23h 39m 39.48081s[1]
Declination −69° 11′ 44.7077″[1]
Apparent magnitude (V) 8.47[2]
DS Tucanae B
Right ascension 23h 39m 39.26965s[3]
Declination −69° 11′ 39.4936″[3]
Apparent magnitude (V) 9.84[4]
Characteristics
Spectral type G6V+K3V[4]
Variable type RS CVn[5]
Astrometry
A
Radial velocity (Rv)7.20[6] km/s
Proper motion (μ) RA: 79.529[1] mas/yr
Dec.: −67.551[1] mas/yr
Parallax (π)22.6367 ± 0.0150 mas[1]
Distance144.08 ± 0.10 ly
(44.18 ± 0.03 pc)
B
Radial velocity (Rv)5.32[7] km/s
Proper motion (μ) RA: 78.133[3] mas/yr
Dec.: −65.845[3] mas/yr
Parallax (π)22.6524 ± 0.0125 mas[3]
Distance143.98 ± 0.08 ly
(44.15 ± 0.02 pc)
Details
DS Tucanae A
Mass1.01±0.06[8] M
Radius0.964±0.029[8] R
Luminosity0.725±0.013[8] L
Temperature5,428±80[8] K
Rotational velocity (v sin i)27.75+1.73
−1.54
[9] km/s
Age45±4[8] Myr
DS Tucanae B
Mass0.84±0.06[8] M
Radius0.864±0.036[8] R
Luminosity0.327±0.010[8] L
Temperature4,700±90[8] K
Age45±4[8] Myr
Other designations
DS Tuc, HD 222259, CCDM J23397-6912AB, CD−69°2106, HIP 116748, WDS J23397-6912AB, TIC 410214986, TOI 200
Database references
SIMBADAB
A
B
Ab

DS Tucanae (HD 222259) is a binary star system 144 light years away in the constellation of Tucana. It has an apparent visual magnitude of 8.5,[8] and is a RS Canum Venaticorum variable.[5] The system is notable for being young as a member of the 45 Myr old Tucana-Horologium moving group[10] and for the primary star hosting the confirmed exoplanet DS Tucanae Ab, discovered by THYME, using TESS.[11][8][12][13]

  1. ^ a b c d e 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. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. ^ a b c d e 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. ^ a b Cite error: The named reference Torres was invoked but never defined (see the help page).
  5. ^ a b Samus', N. N.; Goranskii, V. P.; Durlevich, O. V.; Zharova, A. V.; Kazarovets, E. V.; Kireeva, N. N.; Pastukhova, E. N.; Williams, D. B.; Hazen, M. L. (July 2003). "An Electronic Version of the Second Volume of the General Catalogue of Variable Stars with Improved Coordinates". Astronomy Letters. 29 (7): 468–479. Bibcode:2003AstL...29..468S. doi:10.1134/1.1589864. ISSN 1063-7737. S2CID 16299532.
  6. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  7. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  8. ^ a b c d e f g h i j k l Newton, Elisabeth R.; et al. (July 2019). "TESS Hunt for Young and Maturing Exoplanets (THYME): A Planet in the 45 Myr Tucana-Horologium Association". The Astrophysical Journal Letters. 880 (1): L17. arXiv:1906.10703. Bibcode:2019ApJ...880L..17N. doi:10.3847/2041-8213/ab2988. hdl:1721.1/124722. ISSN 0004-637X. S2CID 195658207.
  9. ^ Cite error: The named reference Benatti2021 was invoked but never defined (see the help page).
  10. ^ Zuckerman, B.; Webb, R. A. (2000-06-01). "Identification of a Nearby Stellar Association in theHipparcos Catalog: Implications for Recent, Local Star Formation". The Astrophysical Journal. 535 (2): 959. arXiv:astro-ph/0002461. Bibcode:2000ApJ...535..959Z. doi:10.1086/308897. ISSN 0004-637X. S2CID 2485534.
  11. ^ Albright, Charlotte (14 August 2019). "Dartmouth Astronomer on Leading Discovery of a New Planet | Dartmouth News". news.dartmouth.edu. Retrieved 2022-01-30.
  12. ^ Benatti, S.; Nardiello, D.; Malavolta, L.; Desidera, S.; Borsato, L.; Nascimbeni, V.; Damasso, M.; D'Orazi, V.; Mesa, D.; Messina, S.; Esposito, M.; Bignamini, A.; Claudi, R.; Covino, E.; Lovis, C.; Sabotta, S. (October 2019). "A possibly inflated planet around the bright young star DS Tucanae A". Astronomy & Astrophysics. 630: A81. arXiv:1904.01591. Bibcode:2019A&A...630A..81B. doi:10.1051/0004-6361/201935598. ISSN 0004-6361. S2CID 102486551.
  13. ^ "DS Tuc A b". exoplanetarchive.ipac.caltech.edu. Retrieved 2019-12-18.