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DH Tauri

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(Redirected from DH Tauri b)
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
Epoch J2000.0      Equinox ICRS
Constellation Taurus
DI Tauri
Right ascension 04h 29m 42.472s[1]
Declination +26° 32′ 49.13″[1]
DH Tauri
Right ascension 04h 29m 41.553s[2]
Declination +26° 32′ 58.13″[2]
Apparent magnitude (V) 13.1[3]
Characteristics
Evolutionary stage pre-main sequence[4]
Spectral type M0-M1Ve(T)[5]
Variable type T Tau[5]
Astrometry
Proper motion (μ) RA: 6.603[2] mas/yr
Dec.: −20.871[2] mas/yr
Parallax (π)7.4936±0.0255 mas[2]
Distance435 ± 1 ly
(133.4 ± 0.5 pc)
Details
DI Tauri
Radius1.21[6] R☉
Luminosity0.357[6] L☉
Temperature4,058[6] K
DH Tauri
Mass0.41[7] M☉
Radius1.26[7] R☉
Luminosity0.22[7] L☉
Temperature3,751[8] K
Age3.16[7] Myr
Other designations
DH Tau, WDS J04297+2633B, IRAS 04267+2626, 2MASS J04294155+2632582
Database references
SIMBADdata

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

[edit]

DH Tauri is a type M, or red dwarf star, one of the most common types of star in the Milky Way.[9] 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☉, which is unusually large for a red dwarf.

The companion DH Tauri B or b has a mass estimated to be between eight MJ and 50 MJ, making it either a super-Jupiter or brown dwarf.[10][11] Other sources give a mass as high as 0.03 M☉, with a bolometric luminosity of 0.01 L☉.[12] The spectral type has been classified as M7.5[12] or M9.25.[13] The companion has detected water vapor and carbon monoxide in its atmosphere and has a rotational velocity of 9.6 ± 0.7 km/s. This is between 9 and 15% of the breakup speed of DH Tau B. This low rotation is in agreement with magnetic coupling to a circumplanetary disk in the late stages of accretion, which reduces angular momentum of the companion.[10] 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).[14] It may have an orbiting candidate companion DH Tauri Bb, possibly an exomoon with 1 MJ, and a mass ratio with respect to the brown dwarf of one-tenth.[15] However, the existence of this companion is uncertain, as its detection may be an artifact of instrumental effects.[16]

The DH Tauri planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination
(°)		 Radius
b 8.4±1.1,[17] 12.6±2.5[18] MJ 234+102
−41[18]		 5,500+4,500
−1,600[18]		 0.58+0.32
−0.26[18]		 88+11
−13[18]		 2.51±0.16[17] RJ

References

[edit]
  1. 1 2 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ↑ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". VizieR On-line Data Catalog. 2237. Bibcode:2002yCat.2237....0D.
  4. ↑ Zhou, Yifan; Herczeg, Gregory J; Kraus, Adam L; Metchev, Stanimir; Cruz, Kelle L (2014). "Accretion onto Planetary Mass Companions of Low-mass Young Stars". The Astrophysical Journal Letters. 783 (1): L17. arXiv:1401.6545. Bibcode:2014ApJ...783L..17Z. doi:10.1088/2041-8205/783/1/L17. S2CID 119255447.
  5. 1 2 Samus, N. N.; Durlevich, O. V.; 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.
  6. 1 2 3 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. 1 2 3 4 Herczeg, Gregory J.; Hillenbrand, Lynne A. (2014). "An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties". The Astrophysical Journal. 786 (2): 97. arXiv:1403.1675. Bibcode:2014ApJ...786...97H. doi:10.1088/0004-637X/786/2/97. S2CID 36942035.
  8. ↑ 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.
  9. ↑ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. 22 April 2019. Retrieved 2021-03-08.
  10. 1 2 Xuan, Jerry W.; Bryan, Marta L.; Knutson, Heather A.; Bowler, Brendan P.; Morley, Caroline V.; Benneke, Björn (2020-03-01). "A Rotation Rate for the Planetary-mass Companion DH Tau b". The Astronomical Journal. 159 (3): 97. arXiv:2001.01759. Bibcode:2020AJ....159...97X. doi:10.3847/1538-3881/ab67c4. ISSN 0004-6256.
  11. ↑ Itoh, Yoichi; Hayashi, Masahiko; Tamura, Motohide; Tsuji, Takashi; Oasa, Yumiko; Fukagawa, Misato; Hayashi, Saeko S.; Naoi, Takahiro; Ishii, Miki; Mayama, Satoshi; Morino, Jun-ichi; Yamashita, Takuya; Pyo, Tae-Soo; Nishikawa, Takayuki; Usuda, Tomonori (2005-02-20). "A Young Brown Dwarf Companion to DH Tauri". The Astrophysical Journal. 620 (2): 984–993. arXiv:astro-ph/0411177. Bibcode:2005ApJ...620..984I. doi:10.1086/427086. ISSN 0004-637X.
  12. 1 2 Ward-Duong, K.; Patience, J.; Bulger, J.; Van Der Plas, G.; Ménard, F.; Pinte, C.; Jackson, A. P.; Bryden, G.; Turner, N. J.; Harvey, P.; Hales, A.; De Rosa, R. J. (2018). "The Taurus Boundary of Stellar/Substellar (TBOSS) Survey. II. Disk Masses from ALMA Continuum Observations". The Astronomical Journal. 155 (2): 54. arXiv:1712.07669. Bibcode:2018AJ....155...54W. doi:10.3847/1538-3881/aaa128. S2CID 55142673.
  13. ↑ 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. arXiv:1306.3709. Bibcode:2014A&A...562A.127B. doi:10.1051/0004-6361/201118270. S2CID 53064211.
  14. ↑ Van Holstein, R. G.; Stolker, T.; Jensen-Clem, R.; Ginski, C.; Milli, J.; De Boer, J.; Girard, J. H.; Wahhaj, Z.; Bohn, A. J.; Millar-Blanchaer, M. A.; Benisty, M.; Bonnefoy, M.; Chauvin, G.; Dominik, C.; Hinkley, S.; Keller, C. U.; Keppler, M.; Langlois, M.; Marino, S.; Ménard, F.; Perrot, C.; Schmidt, T. O. B.; Vigan, A.; Zurlo, A.; Snik, F. (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. arXiv:2101.04033. Bibcode:2021A&A...647A..21V. doi:10.1051/0004-6361/202039290. S2CID 231573543.
  15. ↑ Lazzoni, C.; et al. (20 July 2020). "The search for disks or planetary objects around directly imaged companions: A candidate around DH Tau B". Astronomy & Astrophysics. 641: A131. arXiv:2007.10097. Bibcode:2020A&A...641A.131L. doi:10.1051/0004-6361/201937290. S2CID 220647289.
  16. ↑ Lazzoni, Cecilia; Zurlo, Alice; Desidera, Silvano; Bernardi, Andrea; Pérez, Sebastian; Mesa, Dino; Barbato, Domenico; Nogueira, Pedro Henrique; Dasgupta, Anuroop (2026-03-25). "SaNDi-SHoP: Searching for Satellites'N'Disks with a Star-Hopping Program I. Analysis of the close surroundings of DI companions". arXiv:2603.24796 [astro-ph.EP].
  17. 1 2 Palma-Bifani, P.; Bonnefoy, M.; Chauvin, G.; Rojo, P.; Baudoz, P.; Charnay, B.; Denis, A.; Hoch, K.; Petrus, S.; Ravet, M.; Simonnin, A.; Vigan, A. (September 2025). "The planetary-mass-limit VLT/SINFONI library: Spectral extraction and atmospheric characterization via forward modeling". Astronomy and Astrophysics. 701: A51. arXiv:2507.03562. Bibcode:2025A&A...701A..51P. doi:10.1051/0004-6361/202554894. ISSN 0004-6361.
  18. 1 2 3 4 5 Bernardi, Andrea; Zurlo, Alice; Lazzoni, Cecilia; Desidera, Silvano; Mesa, Dino; Pérez, Sebastian; Nogueira, Pedro Henrique; Barbato, Domenico; Dasgupta, Anuroop (2026-07-15). "SaNDi-SHoP: Searching for Satellites'N'Disks with a Star-Hopping Program II. Spectrophotometric analysis and orbital monitoring of directly imaged companions". arXiv:2607.13545 [astro-ph.EP].
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