{{Short description|Star in the constellation Taurus}} {{Starbox begin}} {{Starbox image | image= 250px | caption=DH Tauri and the b companion (lower left) with the Very Large Telescope | credit=ESO VLT SPHERE; Van Holstein et al.; Processing: Meli_thev }} {{Starbox observe 2s | constell = Taurus | epoch = J2000.0 | component1 = DI Tauri | ra1 = {{RA|04|29|42.472}}<ref name=dr3dl>{{cite DR3|151374198202645376}}</ref> | dec1 = {{DEC|+26|32|49.13}}<ref name=dr3dl/>
| component2 = DH Tauri | ra2 = {{RA|04|29|41.553}}<ref name=dr3/> | dec2 = {{DEC|+26|32|58.13}}<ref name=dr3/> | appmag_v2 = 13.1<ref name=ubv/> }} {{Starbox character | type = pre-main sequence<ref name="zhou2014"/> | class = M0-M1Ve(T)<ref name=gcvs/> | variable = T Tau<ref name=gcvs/> }} {{Starbox astrometry | radial_v = | prop_mo_ra = 6.603<ref name=dr3/> | prop_mo_dec = −20.871<ref name=dr3/> | parallax = 7.4936 | p_error = 0.0255 | parallax_footnote = <ref name=dr3/> | absmag_v = }} {{Starbox detail | component1 = DI Tauri | mass = | radius = 1.21<ref name=dr2DLTau>{{cite DR2|151374198202645376}}</ref> | temperature = 4,058<ref name=dr2DLTau/> | luminosity = 0.357<ref name=dr2DLTau/> | component2 = DH Tauri | mass2 = 0.41<ref name=hillenbrand2014/> | temperature2 = 3,751<ref name=dr2>{{cite DR2|151374202498079872}}</ref> | luminosity2 = 0.22<ref name=hillenbrand2014/> | radius2 = 1.26<ref name=hillenbrand2014/> | age_myr2 = 3.16<ref name=hillenbrand2014/> }} {{Starbox catalogue | names = {{odlist |V=DH Tau |2MASS=J04294155+2632582 |IRAS=04267+2626 |WDS=J04297+2633B }} }} {{Starbox reference | Simbad = DH+Tauri }} {{Starbox end}}
'''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 {{val|15|ul="}} 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.<ref name=exoplanets/> It has an apparent magnitude of 13.71 and temperature of {{val|3751|fmt=commas|ul=K}}. DH Tauri has a mass of {{solar mass|0.41}} and an estimated radius of {{solar radius|1.26}}, which is unusually large for a red dwarf.
The companion DH Tauri B or b has a mass estimated to be between {{jupiter mass|eight}} and {{jupiter mass|50}}, making it either a super-Jupiter or brown dwarf.<ref name=Xuan2020/><ref>{{Cite journal |last1=Itoh |first1=Yoichi |last2=Hayashi |first2=Masahiko |last3=Tamura |first3=Motohide |last4=Tsuji |first4=Takashi |last5=Oasa |first5=Yumiko |last6=Fukagawa |first6=Misato |last7=Hayashi |first7=Saeko S. |last8=Naoi |first8=Takahiro |last9=Ishii |first9=Miki |last10=Mayama |first10=Satoshi |last11=Morino |first11=Jun-ichi |last12=Yamashita |first12=Takuya |last13=Pyo |first13=Tae-Soo |last14=Nishikawa |first14=Takayuki |last15=Usuda |first15=Tomonori |date=2005-02-20 |title=A Young Brown Dwarf Companion to DH Tauri |journal=The Astrophysical Journal |language=en |volume=620 |issue=2 |pages=984–993 |arxiv=astro-ph/0411177 |bibcode=2005ApJ...620..984I |doi=10.1086/427086 |issn=0004-637X}}</ref> Other sources give a mass as high as {{solar mass|0.03}}, with a bolometric luminosity of {{solar luminosity|0.01}}.<ref name=w-d2018/> The spectral type has been classified as M7.5<ref name=w-d2018/> or M9.25.<ref name=bonnefoy2014/> 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.<ref name="Xuan2020"/> 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).<ref name=v-h2021/> It is potentially orbited by a smaller candidate companion DH Tauri Bb (possibly an exomoon) with {{jupiter mass|1}}, and a mass ratio with respect to the brown dwarf of one-tenth.<ref name="Lazzoni2020">{{cite journal |last=Lazzoni |first=C. |display-authors=etal |date=20 July 2020 |title=The search for disks or planetary objects around directly imaged companions: A candidate around DH Tau B |journal=Astronomy & Astrophysics |volume=641 |pages=A131 |doi=10.1051/0004-6361/201937290 |arxiv=2007.10097|bibcode=2020A&A...641A.131L |s2cid=220647289 }}</ref>
{{OrbitboxPlanet begin | table_ref = }} {{OrbitboxPlanet | exoplanet = b | mass = {{Val|8.4|1.1}},<ref name=Palma-Bifani2025/> {{val|11.3|2.2}}<ref name=Lazzoni2026/> | period = | semimajor = {{val|234|100|41}}<ref name=Lazzoni2026/> | eccentricity = {{Val|0.58|0.32|0.26}}<ref name=Lazzoni2026/> | radius = {{val|2.51|0.16}}<ref name=Palma-Bifani2025/> }} {{Orbitbox end}}
==References== {{Reflist|refs=
<ref name="Xuan2020">{{Cite journal |last1=Xuan |first1=Jerry W. |last2=Bryan |first2=Marta L. |last3=Knutson |first3=Heather A. |last4=Bowler |first4=Brendan P. |last5=Morley |first5=Caroline V. |last6=Benneke |first6=Björn |date=2020-03-01 |title=A Rotation Rate for the Planetary-mass Companion DH Tau b |journal=The Astronomical Journal |volume=159 |issue=3 |pages=97 |arxiv=2001.01759 |bibcode=2020AJ....159...97X |doi=10.3847/1538-3881/ab67c4 |doi-access=free |issn=0004-6256}}</ref>
<ref name=v-h2021>{{cite journal |bibcode=2021A&A...647A..21V |title=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 |last1=Van Holstein |first1=R. G. |last2=Stolker |first2=T. |author3-link=Rebecca Jensen-Clem |last3=Jensen-Clem |first3=R. |last4=Ginski |first4=C. |last5=Milli |first5=J. |last6=De Boer |first6=J. |last7=Girard |first7=J. H. |last8=Wahhaj |first8=Z. |last9=Bohn |first9=A. J. |last10=Millar-Blanchaer |first10=M. A. |last11=Benisty |first11=M. |last12=Bonnefoy |first12=M. |last13=Chauvin |first13=G. |last14=Dominik |first14=C. |last15=Hinkley |first15=S. |last16=Keller |first16=C. U. |last17=Keppler |first17=M. |last18=Langlois |first18=M. |last19=Marino |first19=S. |last20=Ménard |first20=F. |last21=Perrot |first21=C. |last22=Schmidt |first22=T. O. B. |last23=Vigan |first23=A. |last24=Zurlo |first24=A. |last25=Snik |first25=F. |journal=Astronomy and Astrophysics |year=2021 |volume=647 |page=647 |doi=10.1051/0004-6361/202039290 |arxiv=2101.04033 |s2cid=231573543 }}</ref>
<ref name=exoplanets>{{Cite web|title=Exoplanet-catalog|url=https://exoplanets.nasa.gov/exoplanet-catalog/7016/dh-tauri-b/|access-date=2021-03-08|website=Exoplanet Exploration: Planets Beyond our Solar System}}</ref>
<ref name=bonnefoy2014>{{cite journal |bibcode= 2014A&A...562A.127B |title= A library of near-infrared integral field spectra of young M-L dwarfs |last1= Bonnefoy |first1= M. |last2= Chauvin |first2= G. |last3= Lagrange |first3= A. -M. |last4= Rojo |first4= P. |last5= Allard |first5= F. |last6= Pinte |first6= C. |last7= Dumas |first7= C. |last8= Homeier |first8= D. |journal= Astronomy and Astrophysics |year= 2014 |volume= 562 |pages= A127 |doi= 10.1051/0004-6361/201118270 |arxiv= 1306.3709 |s2cid= 53064211 }}</ref>
<ref name=w-d2018>{{cite journal |bibcode=2018AJ....155...54W |title=The Taurus Boundary of Stellar/Substellar (TBOSS) Survey. II. Disk Masses from ALMA Continuum Observations |last1=Ward-Duong |first1=K. |last2=Patience |first2=J. |last3=Bulger |first3=J. |last4=Van Der Plas |first4=G. |last5=Ménard |first5=F. |last6=Pinte |first6=C. |last7=Jackson |first7=A. P. |last8=Bryden |first8=G. |last9=Turner |first9=N. J. |last10=Harvey |first10=P. |last11=Hales |first11=A. |last12=De Rosa |first12=R. J. |journal=The Astronomical Journal |year=2018 |volume=155 |issue=2 |page=54 |doi=10.3847/1538-3881/aaa128 |arxiv=1712.07669 |s2cid=55142673 |doi-access=free }}</ref>
<ref name=dr3>{{cite DR3|151374202498079872}}</ref>
<ref name=ubv>{{cite journal |bibcode=2002yCat.2237....0D |title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system |last1=Ducati |first1=J. R. |journal=VizieR On-line Data Catalog |year=2002 |volume=2237 }}</ref>
<ref name=gcvs>{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|pages=B/GCVS|display-authors=etal|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}</ref>
<ref name=hillenbrand2014>{{cite journal |bibcode=2014ApJ...786...97H |title=An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties |last1=Herczeg |first1=Gregory J. |last2=Hillenbrand |first2=Lynne A. |journal=The Astrophysical Journal |year=2014 |volume=786 |issue=2 |page=97 |doi=10.1088/0004-637X/786/2/97 |arxiv=1403.1675 |s2cid=36942035 }}</ref>
<ref name="zhou2014">{{cite journal|bibcode=2014ApJ...783L..17Z|title=Accretion onto Planetary Mass Companions of Low-mass Young Stars|journal=The Astrophysical Journal Letters|volume=783|issue=1|pages=L17|last1=Zhou|first1=Yifan|last2=Herczeg|first2=Gregory J|last3=Kraus|first3=Adam L|last4=Metchev|first4=Stanimir|last5=Cruz|first5=Kelle L|year=2014|doi=10.1088/2041-8205/783/1/L17|arxiv=1401.6545|s2cid=119255447}}</ref>
<ref name=Palma-Bifani2025>{{Cite journal |last=Palma-Bifani |first=P. |last2=Bonnefoy |first2=M. |last3=Chauvin |first3=G. |last4=Rojo |first4=P. |last5=Baudoz |first5=P. |last6=Charnay |first6=B. |last7=Denis |first7=A. |last8=Hoch |first8=K. |last9=Petrus |first9=S. |last10=Ravet |first10=M. |last11=Simonnin |first11=A. |last12=Vigan |first12=A. |date=September 2025 |title=The planetary-mass-limit VLT/SINFONI library: Spectral extraction and atmospheric characterization via forward modeling |bibcode=2025A&A...701A..51P |journal=Astronomy and Astrophysics |language=en |volume=701 |pages=A51 |doi=10.1051/0004-6361/202554894 |issn=0004-6361|arxiv=2507.03562 }}</ref>
<ref name=Lazzoni2026>{{Cite arXiv |last1=Lazzoni |first1=Cecilia |last2=Zurlo |first2=Alice |last3=Desidera |first3=Silvano |last4=Bernardi |first4=Andrea |last5=Pérez |first5=Sebastian |last6=Mesa |first6=Dino |last7=Barbato |first7=Domenico |last8=Nogueira |first8=Pedro Henrique |last9=Dasgupta |first9=Anuroop |date=2026-03-25 |title=SaNDi-SHoP: Searching for Satellites'N'Disks with a Star-Hopping Program I. Analysis of the close surroundings of DI companions |eprint=2603.24796 |class=astro-ph.EP}}</ref>
}}
{{Stars of Taurus}}
Tauri, DH Category:T Tauri stars Category:M-type main-sequence stars 04267+262 Category:Taurus (constellation) Category:Hypothetical planetary systems