CQ Tauri

CQ Tauri

A visual band light curve for CQ Tauri, plotted from INTEGRAL OMC data[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Taurus
Right ascension 05h 35m 58.467s[2]
Declination 24° 44′ 54.09″[2]
Apparent magnitude (V) 10.48[3] (8.7 to 12.25)[4]
Characteristics
Evolutionary stage Pre-main-sequence[5]
Spectral type F5IVe[6]
B−V color index 0.696±0.091[3]
Variable type Orion variable[4]
Astrometry
Radial velocity (Rv)22.60±2.7[7] km/s
Proper motion (μ) RA: 2.987 mas/yr[2]
Dec.: −26.364 mas/yr[2]
Parallax (π)6.6946 ± 0.0600 mas[2]
Distance487 ± 4 ly
(149 ± 1 pc)
Absolute magnitude (MV)5.92[8]
Details
Mass1.67[9] M☉
Radius1.7[10] R☉
Luminosity10[9] L☉
Surface gravity (log g)4.0[8] cgs
Temperature6,900[9] K
Metallicity [Fe/H]+0.14[11] dex
Rotational velocity (v sin i)105.0±5.0[6] km/s
Age10[9] Myr
Other designations
CQ Tau, BD+24°873, HD 36910, HIP 26295, SAO 77299, PPM 94541[12]
Database references
SIMBADdata

CQ Tauri is a young variable star[5] in the equatorial constellation of Taurus. It is too faint to be visible to the naked eye with an apparent visual magnitude that ranges from 8.7 to 12.25.[4] The distance to this star is approximately 487 light years based on parallax measurements, and it is drifting further away with a radial velocity of ~23 km/s.[7] It appears to be part of the T-association Tau 4.[8] CQ Tauri lies close enough to the ecliptic to undergo lunar occultations.[13]

This star was independently reported as a variable by Artjukinov (sp?) in 1948 and C. Hoffmeister in 1949.[14] Hoffmeister classified it as a member of the RW Aurigae-like variables with a brightness that ranged from an apparent visual magnitude of 8.7 down to 10.5,[15] making it one of the brightest members of that type.[14] G. H. Herbig in 1960 found a spectral class of F2 for this star,[16] and by 1973 it was classed as an Orion variable of the T Tauri type.[17] In 1968, W. Götz and W. Wenzel discovered a faint emission of blue light coming from the system.[18]

Spectral images of the system in 1973 showed double emission lines on an F-type star.[19] It was found to be an infrared source by IRAS and associated with nebulosity, which allowed it to be cataloged as a Herbig Ae/Be star in 1994 by P. S. Thé and associates.[20] The star undergoes irregular brightness decreases that are otherwise similar to an Algol-like variation. It is being orbited by an inhomogeneous accretion disk, which is the source for the emission lines.[21]

CQ Tauri is a pre-main-sequence star with a stellar classification of F5IVe.[6] It has 1.67 times the mass of the Sun and is radiating 10 times the Sun's luminosity with an effective temperature of 6,900 K. The star is about 10 million years old[9] and is spinning with a projected rotational velocity of 105 km/s.[6] Simulations intended to reproduce the distribution of the circumstellar disk suggest an embedded planet with a mass of 6–9 MJ is orbiting the star at a distance of ~20 AU.[9] Near infrared observations in 2018 show a spiral structure in the disk that is consistent with the presence of an orbiting planet. However, no planet was detected.[22]

  1. ^ Cite error: The named reference OMCarchive was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference GaiaEDR3 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Samus_et_al_2017 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Testi_et_al_2003 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Mora_et_al_2001 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Gontcharov_2006 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Alecian_et_al_2013 was invoked but never defined (see the help page).
  9. ^ a b c d e f Cite error: The named reference Giulia_Ubeira_Gabellini_et_al_2019 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference ticv8 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Bochanksi2018 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Cassar_et_al_1989 was invoked but never defined (see the help page).
  14. ^ a b Cite error: The named reference Ashbrook_1950 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Hoffmeister_1949 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Herbig_1960 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Cohen_1973 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference Berdyugin_et_al_1990 was invoked but never defined (see the help page).
  19. ^ Cite error: The named reference Herbig_Bell_1988 was invoked but never defined (see the help page).
  20. ^ Cite error: The named reference The_et_al_1994 was invoked but never defined (see the help page).
  21. ^ Cite error: The named reference Kozlova_et_al_2000 was invoked but never defined (see the help page).
  22. ^ Cite error: The named reference Uyama_et_al_2020 was invoked but never defined (see the help page).