GG Tauri

GG Tauri

Artist's impression of the disk surrounding GG Tauri A
Credit: ESO/L. Calçada
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
GG Tauri A
Right ascension 04h 32m 30.31s[1]
Declination +17° 31′ 41.0″[1]
Apparent magnitude (V) 12.25 ± 0.03 / 14.70 ± 0.06[2]
GG Tauri Ba
Right ascension 04h 32m 30.25s[3]
Declination +17° 31′ 30.9″[3]
Apparent magnitude (V) 17.11 ± 0.07[2]
GG Tauri Bb
Right ascension 04h 32m 30.31s[4]
Declination +17° 31′ 29.9″[4]
Apparent magnitude (V) 19.94 ± 0.08[2]
Characteristics
Spectral type K7 / M2 / M3 / M5 / M7[5][6]
U−B color index +0.06[7]
B−V color index +1.38[7]
Variable type T Tauri
Astrometry
Radial velocity (Rv)12.0[8] km/s
Proper motion (μ) RA: 15.6[9] mas/yr
Dec.: -21.1[9] mas/yr
Distance450 ly
(140[10] pc)
Orbit[11] [12]
PrimaryGG Tau Aa
CompanionGG Tau Ab
Period (P)162+62
−15 yr
Semi-major axis (a)243 mas
(34 AU)
Eccentricity (e)0.28+0.05
−0.14
Inclination (i)143°
Longitude of the node (Ω)277+2
−2°
Periastron epoch (T)2463400+1470
−5420
Argument of periastron (ω)
(secondary)		91+4
−13°
Details
GG Tau Aa
Mass0.78 ± 0.09[13] M☉
Radius1.63 [14] R☉
Luminosity0.38[15] L☉
Temperature3700[15] K
Age1.5[5] Myr
GG Tau Ab
Luminosity0.133 + 0.067[15] L☉
Temperature3300 + 3100[15] K
Age1.5[5] Myr
GG Tau Ba
Mass0.12 ± 0.02[13] M☉
Radius1.45 [16] R☉
Luminosity0.096[5] L☉
Age1.5[5] Myr
GG Tauri Bb
Mass0.04 ± 0.003[13] M☉
Radius0.497 [17] R☉
Luminosity0.015[5] L☉
Age1.5[5] Myr
Other designations
GG Tau, WDS J04325+1732, TYC 1270-897-1[18]
Database references
SIMBADdata

GG Tauri, often abbreviated as GG Tau, is a quintuple star system in the constellation Taurus. At a distance of about 450 light years (140 parsecs) away, it is located within the Taurus-Auriga Star Forming Region. The system comprises three stars orbiting each other in a hierarchical triple system, known as GG Tauri A, and another binary star system more distant from the central system, known as GG Tauri B.[19]

The system is unusual because it contains two distinct circumstellar disks: one surrounding the entirety of GG Tauri A, and another surrounding the brightest star of GG Tauri A.[19] Its large size and close distance make it ideal to study how exoplanets form within multiple star systems.[20]

  1. ^ a b "** LEI 3Aa". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 February 2017.
  2. ^ a b c Cite error: The named reference KristWFPC2 was invoked but never defined (see the help page).
  3. ^ a b "** LEI 3Ba". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 February 2017.
  4. ^ a b "** LEI 3Bb". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 10 February 2017.
  5. ^ a b c d e f g Cite error: The named reference White was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference DiFolco was invoked but never defined (see the help page).
  7. ^ a b Smak, J. (1964). "On the colors of T Tauri stars and related objects". Astrophysical Journal. 139: 1095. Bibcode:1964ApJ...139.1095S. doi:10.1086/147851.
  8. ^ Joy, Alfred H. (1949). "Bright-Line Stars among the Taurus Dark Clouds". Astrophysical Journal. 110: 424. Bibcode:1949ApJ...110..424J. doi:10.1086/145217.Accessed using SIMBAD.
  9. ^ a b Zacharias, N.; Urban, S. E.; Zacharias, M. I.; Wycoff, G. L.; Hall, D. M.; Germain, M. E.; Holdenried, E. R.; Winter, L. (2003). "VizieR Online Data Catalog: The Second U.S. Naval Observatory CCD Astrograph Catalog (UCAC2)". CDS/ADC Collection of Electronic Catalogues. Bibcode:2003yCat.1289....0Z.Accessed using SIMBAD.
  10. ^ Piétu, V.; Gueth, F.; Hily-Blant, P.; Schuster, K.-F.; Pety, J. (2011). "High resolution imaging of the GG Tauri system at 267 GHz". Astronomy & Astrophysics. 582: A81. arXiv:1102.4029. Bibcode:2011A&A...528A..81P. doi:10.1051/0004-6361/201015682. S2CID 118589049.
  11. ^ Köhler, R. (2011). "The orbit of GG Tauri A". Astronomy & Astrophysics. 530: A126. arXiv:1104.2245. Bibcode:2011A&A...530A.126K. doi:10.1051/0004-6361/201016327. Note: "most plausible orbit" is given in the starbox above.
  12. ^ Keppler, M.; Penzlin, A.; Benisty, M.; van Boekel, R.; Henning, T.; van Holstein, R. G.; Kley, W.; Garufi, A.; Ginski, C.; Brandner, W.; Bertrang, G. H.-M.; Boccaletti, A.; de Boer, J.; Bonavita, M.; Brown Sevilla, S.; Chauvin, G.; Dominik, C.; Janson, M.; Langlois, M.; Lodato, G.; Maire, A.-L.; Ménard, F.; Pantin, E.; Pinte, C.; Stolker, T.; Szulágyi, J.; Thebault, P.; Villenave, M.; Zurlo, A.; Rabou, P.; Feautrier, P.; Feldt, M.; Madec, F.; Wildi, F. (July 2020). "Gap, shadows, spirals, and streamers: SPHERE observations of binary-disk interactions in GG Tauri A". Astronomy & Astrophysics. 639: A62. arXiv:2005.09037. Bibcode:2020A&A...639A..62K. doi:10.1051/0004-6361/202038032. S2CID 218684431.
  13. ^ a b c Cite error: The named reference Beust was invoked but never defined (see the help page).
  14. ^ https://exoplanet.eu/catalog/gg_tau_ae--10014/
  15. ^ a b c d Cite error: The named reference Brauer was invoked but never defined (see the help page).
  16. ^ https://exoplanet.eu/catalog/gg_tau_bb--7904/ https://iopscience.iop.org/article/10.3847/1538-4357/ab7ead
  17. ^ https://exoplanet.eu/catalog/gg_tau_bb--7904/
  18. ^ "V* GG Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 11 February 2017.
  19. ^ a b "Astronomers Examine Ezekiel-like 'Wheel in a Wheel' in Binary System GG Tauri-A". Sci-News.com. 30 October 2014. Retrieved 10 February 2017.
  20. ^ Dutrey, Anne; Di Folco, Emmanuel; Beck, Tracy; Guilloteau, Stéphane (2016). "GG Tau: The ringworld and beyond". The Astronomy and Astrophysics Review. 24. doi:10.1007/s00159-015-0091-5. S2CID 123210114.