Astronomy:DH Tauri
 DH Tauri and the b companion (lower left) with the Very Large Telescope Credit: ESO VLT SPHERE; Van Holstein et al.; Processing: Meli_thev | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 29m 41.558s[1] |
| Declination | +26° 32′ 58.27″[1] |
| Apparent magnitude (V) | 13.1[2] |
| Characteristics | |
| Spectral type | M0-M1Ve(T)[3] |
| Variable type | T Tau[3] |
| Astrometry | |
| Proper motion (μ) | RA: +7.065[4] mas/yr Dec.: -20.699[4] mas/yr |
| Parallax (π) | 7.3880 ± .0593[4] mas |
| Distance | 441 ± 4 ly (135 ± 1 pc) |
| Details | |
| Mass | 0.41[5] M☉ |
| Radius | 1.26[5] R☉ |
| Luminosity | 0.22[5] L☉ |
| Temperature | 3,751[4] K |
| Age | 3.16[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
DH Tauri, also known as DH Tau, is a type M star, located 140 parsecs (456.619 light years) away. It forms a binary system with DI Tauri 15″ away, and has a substellar companion, either a brown dwarf or massive exoplanet.
Characteristics
DH Tauri is a type M, or red dwarf star, one of the most common types of star in the Milky Way.[6] It has an apparent magnitude of 13.71 and temperature of 3,751 K. DH Tauri has a mass of 0.41 M☉ and an estimated radius of 1.26 R☉.
The companion DH Tauri B or b has a mass estimated to be between eight MJ and 22 MJ, making it either a super-Jupiter or brown dwarf.[7] Other sources give a mass as high as 0.03 M☉, with a bolometric luminosity of 0.01 L☉.[8] The spectral type has been classified as M7.5[8] or M9.25.[9] The companion, while its host star still having a protoplanetary disk, is still accreting material, being surrounded by a circumsubstellar disk (possibly a circumplanetary disk, depending on its formation history).[10]
References
- ↑ 1.0 1.1 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E. et al. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues 2246: II/246. Bibcode: 2003yCat.2246....0C. http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=II/246.
- ↑ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". VizieR On-line Data Catalog. Bibcode: 2002yCat.2237....0D.
- ↑ 3.0 3.1 Samus, N. N. et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S 1: B/gcvs. Bibcode: 2009yCat....102025S.
- ↑ 4.0 4.1 4.2 4.3 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 5.0 5.1 5.2 5.3 Herczeg, Gregory J.; Hillenbrand, Lynne A. (2014). "An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties". The Astrophysical Journal 786 (2): 97. doi:10.1088/0004-637X/786/2/97. Bibcode: 2014ApJ...786...97H.
- ↑ "Exoplanet-catalog". https://exoplanets.nasa.gov/exoplanet-catalog/7016/dh-tauri-b/.
- ↑ Xuan, Jerry W.; Bryan, Marta L.; Knutson, Heather A.; Bowler, Brendan P.; Morley, Caroline V.; Benneke, Björn (2020). "A Rotation Rate for the Planetary-mass Companion DH Tau B". The Astronomical Journal 159 (3): 97. doi:10.3847/1538-3881/ab67c4. Bibcode: 2020AJ....159...97X.
- ↑ 8.0 8.1 Ward-Duong, K.; Patience, J.; Bulger, J.; Van Der Plas, G.; Ménard, F.; Pinte, C.; Jackson, A. P.; Bryden, G. et al. (2018). "The Taurus Boundary of Stellar/Substellar (TBOSS) Survey. II. Disk Masses from ALMA Continuum Observations". The Astronomical Journal 155 (2): 54. doi:10.3847/1538-3881/aaa128. Bibcode: 2018AJ....155...54W.
- ↑ Bonnefoy, M.; Chauvin, G.; Lagrange, A. -M.; Rojo, P.; Allard, F.; Pinte, C.; Dumas, C.; Homeier, D. (2014). "A library of near-infrared integral field spectra of young M-L dwarfs". Astronomy and Astrophysics 562: A127. doi:10.1051/0004-6361/201118270. Bibcode: 2014A&A...562A.127B.
- ↑ Van Holstein, R. G.; Stolker, T.; Jensen-Clem, R.; Ginski, C.; Milli, J.; De Boer, J.; Girard, J. H.; Wahhaj, Z. et al. (2021). "A survey of the linear polarization of directly imaged exoplanets and brown dwarf companions with SPHERE-IRDIS. First polarimetric detections revealing disks around DH Tau B and GSC 6214-210 B". Astronomy and Astrophysics 647: 647. doi:10.1051/0004-6361/202039290. Bibcode: 2021A&A...647A..21V.
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