V1094 Scorpii

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V1094 Scorpii
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scorpius-Lupus
Right ascension 16h 08m 36.17701s[1]
Declination −39° 23′ 02.4621″[1]
Apparent magnitude (V) 13.48
Characteristics
Spectral type K6V[2]
Variable type T Tauri-type?
Astrometry
Proper motion (μ) RA: −9.830[1] mas/yr
Dec.: +23.435[1] mas/yr
Parallax (π)6.5086 ± 0.0452[1] mas
Distance501 ± 3 ly
(154 ± 1 pc)
Details[2]
Mass0.92 M☉
Radius1.9 R☉
Luminosity1.7 L☉
Temperature4,205 K
Age2-3 Myr
Other designations
V1094 Sco, GSC 07855-01162, 2MASS J16083617-3923024
Database references
SIMBADdata

V1094 Scorpii is a young stellar object in the constellation of Scorpius, located in the young .[3] It is being orbited by a protoplanetary disk that extends out to a distance of 300 AU from the host star. There are gaps at 100 AU and 170 AU, with bright rings at 130 AU and 220 AU.[2]

Planetary system[]

Periodic radial velocity variations in the young star V1094 Scorpii had at first been explained by the presence of a substellar object in a tight orbit.[4] Currently, the presence of a substellar object has been retracted, invoking starspots as the actual cause for observed radial velocity variations.[5]

The V1094 Scorpii planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b (retracted) ≤24 MJ ≈0.065 7.2 ?0 — —

References[]

  1. ^ a b c d e 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.
  2. ^ a b c van Terwisga, S. E.; et al. (August 2018). "V1094 Scorpii: A rare giant multi-ringed disk around a T Tauri star". Astronomy & Astrophysics. 616: 10. arXiv:1805.03221. Bibcode:2018A&A...616A..88V. doi:10.1051/0004-6361/201832862. A88.
  3. ^ Hughes, Joanne; et al. (1993). "The distance to the Lupus star formation region". The Astronomical Journal. 105 (2): 571–575. Bibcode:1993AJ....105..571H. doi:10.1086/116454.
  4. ^ Wichmann, R.; et al. (1997). "T Tauri stars and the Gould Belt near Lupus". Astronomy and Astrophysics. 326: 211–217. Bibcode:1997A&A...326..211W.
  5. ^ Joergens, V.; et al. (2001). "The T Tauri star RX J1608.6-3922 - not an eclipsing binary but a spotted single star". Astronomy and Astrophysics. 373 (3): 966–973. arXiv:astro-ph/0105326. Bibcode:2001A&A...373..966J. doi:10.1051/0004-6361:20010684. S2CID 17464041.
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