# Rho Tauri

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> Markdown URL: https://mediated.wiki/source/Rho_Tauri.md
> Source: https://en.wikipedia.org/wiki/Rho_Tauri
> Source revision: 1350928249
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Star in the constellation Taurus}}
{{Starbox begin
 | name=ρ Tauri
}}
{{Starbox image
 | image=
{{Location mark
|image=Taurus_IAU.svg|alt=|float=center|width=280
|label=|position=right
|mark=Red circle.svg|mark_width=8|mark_link=ρ Tau
|x=550|y=458
}}
|caption=Location of ρ Tauri (circled)
}}
{{Starbox observe
 | epoch=[J2000.0](/source/J2000.0)
 | constell=[Taurus](/source/Taurus_(constellation))
 | ra={{RA|04|33|50.91753}}<ref name=aaa474_2_653/>
 | dec={{DEC|+14|50|39.9232}}<ref name=aaa474_2_653/>
 | appmag_v=4.66<ref name="MERMILLIOD"/>
}}
{{Starbox character
 | type=[main sequence](/source/main_sequence)<ref name=zorec2012/>
 | class=A8V<ref name=aj74_375/>
 | b-v=+0.24<ref name="MERMILLIOD"/>
 | u-b=+0.09<ref name="MERMILLIOD"/>
 | variable=[δ Scuti](/source/Delta_Scuti_variable)<ref name=Solano1997/>
}}
{{Starbox astrometry
 | radial_v=+39.6<ref name=rgcrv/>
 | prop_mo_ra=103.20<ref name=aaa474_2_653/>
 | prop_mo_dec=−26.48<ref name=aaa474_2_653/>
 | parallax=20.61
 | p_error=0.57
 | parallax_footnote=<ref name=aaa474_2_653/>
 | absmag_v=+1.26<ref name=aaa361_614/>
}}
{{starbox orbit
 | reference = <ref name="De Furio 2022"/>
 | period_unitless = {{Val|58.94|0.09}} days
 | axis_unitless = {{Val|0.48|ul=au}}
 | eccentricity = {{Val|0.31|0.16}}
}}
{{Starbox detail
 | source = <ref name="De Furio 2022"/>
 | component1 = A
 | mass = 2.21
 | radius = {{solar radius calculator|type=AD|0.04697|0.377|decimals=2}}{{Efn|1=Calculated with a distance (''d'') of 46.97 parsecs and an angular diameter ({{theta}}) of {{Val|0.377|ul=mas}} using the equation R / {{solar radius}} = 0.1075{{*}}{{theta}}{{*}}''d''.}}
 | age_myr = 630
 | component2 = B
 | mass2 = 2.12
 | radius2 = {{solar radius calculator|type=AD|0.04697|0.341|decimals=2}}{{Efn|1=Calculated with a distance (''d'') of 46.97 parsecs and an angular diameter ({{theta}}) of {{Val|0.341|ul=mas}} using the equation R / {{solar radius}} = 0.1075{{*}}{{theta}}{{*}}''d''.}}
 | age_myr2 = 630
}}
{{Starbox catalog
 | names=[ρ](/source/Bayer_designation) Tau, [86](/source/Flamsteed_designation) Tau, [BD](/source/Bonner_Durchmusterung)+14 720, FK5 1125, [HD](/source/Henry_Draper_Catalogue) 28910, [HIP](/source/Hipparcos_catalogue) 21273, [HR](/source/Bright_Star_Catalog) 1444, [SAO](/source/Smithsonian_Astrophysical_Observatory_Star_Catalogue) 94007<ref name="SIMBAD" />
}}
{{Starbox reference
|Simbad=HD+28910
}}
{{Starbox end}}
'''Rho Tauri''' (ρ Tau, ρ Tauri) is a [binary star](/source/binary_star)<ref name="De Furio 2022"/> in the [constellation](/source/constellation) [Taurus](/source/Taurus_(constellation)) and a member of the [Hyades](/source/Hyades_(star_cluster)) [star cluster](/source/open_cluster).<ref name=aaa523_A71/> The system has an [apparent magnitude](/source/apparent_magnitude) of +4.66<ref name="MERMILLIOD"/> and a combined [spectral type](/source/spectral_type) of A8V.<ref name=aj74_375/> Since one stars (or both) is a [Delta Scuti variable](/source/Delta_Scuti_variable),<ref name=aaa523_A71/> the apparent magnitude varies by 0.010 magnitudes over a period of 1.61 hours.<ref name=Solano1997/>

==Characteristics==
This is a [spectroscopic binary](/source/spectroscopic_binary) system. The two stars have an orbtial period of 58.94 days and a [semi-major axis](/source/semi-major_axis) of 0.48&nbsp;[astronomical unit](/source/astronomical_unit)s. The primary has a mass of 2.21&nbsp;[solar mass](/source/solar_mass)es and a radius of 1.90&nbsp;[solar radii](/source/solar_radius), while the secondary has a mass of 2.12&nbsp;solar masses and a radius of 1.72&nbsp;solar radii.<ref name="De Furio 2022"/>

{{gallery|align=center|width=200
|File:RhoTau_Location.png|[Hyades](/source/Hyades_(star_cluster)), with ρ Tau appearing blue, left of center, marked with a red arrow
|File:RhoTauLightCurve.png|A [blue band](/source/Photometric_system) [light curve](/source/light_curve) for Rho Tauri, adapted from Horan (1979)<ref name="Horan"/>
}}

==Notes==
{{notelist}}

==References==
<references>

<ref name="Horan">{{citation | postscript=.
 | last1=Horan | first1=S.
 | title=A photometric survey of the Hyades for delta Scuti variables
 | journal=Astronomical Journal | date=November 1979 | volume=84 | pages=1770–1774
 | doi=10.1086/112607 | bibcode=1979AJ.....84.1770H
 | url=https://articles.adsabs.harvard.edu/pdf/1979AJ.....84.1770H | access-date=5 September 2022| doi-access=free }}</ref>

<ref name="SIMBAD">{{citation
 | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Rho+Tauri
 | title=rho Tau -- Variable Star of delta Sct type
 | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | access-date= 2014-12-28 }}</ref>

<ref name="De Furio 2022">{{Citation |last1=De Furio |first1=Matthew |last2=Gardner |first2=Tyler |last3=Monnier |first3=John |last4=Meyer |first4=Michael R. |last5=Kratter |first5=Kaitlin|author5-link=Kaitlin Kratter |last6=Schaefer |first6=Gail |last7=Anugu |first7=Narsireddy |last8=Davies |first8=Claire L. |last9=Kraus |first9=Stefan |last10=Lanthermann |first10=Cyprien |last11=Le Bouquin |first11=Jean-Baptiste |last12=Ennis |first12=Jacob |date=2022-12-01 |title=The Small Separation A-star Companion Population: First Results with CHARA/MIRC-X |journal=The Astrophysical Journal |volume=941 |issue=2 |pages=118 |doi=10.3847/1538-4357/aca1ad |doi-access=free |arxiv=2211.01465 |bibcode=2022ApJ...941..118D |issn=0004-637X}}</ref>

<ref name=Solano1997>{{citation
 | title=Spectroscopic survey of delta Scuti stars. I. Rotation velocities and effective temperatures
 | last1=Solano | first1=E. | last2=Fernley | first2=J.
 | journal=Astronomy & Astrophysics Supplement Series | postscript=.
 | volume=122 | pages=131–147 | date=April 1997
 | doi=10.1051/aas:1997329 | bibcode=1997A&AS..122..131S | doi-access=free }}</ref>

<ref name=aaa474_2_653>{{citation | last1=van Leeuwen | first1=F. | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 |date=November 2007 | pages=653–664 | doi=10.1051/0004-6361:20078357 | bibcode=2007A&A...474..653V | arxiv=0708.1752 | s2cid=18759600 }}</ref>

<ref name=aj74_375>{{citation | display-authors=1 | last1=Cowley | first1=A. | last2=Cowley | first2=C. | last3=Jaschek | first3=M. | last4=Jaschek | first4=C. | title=A study of the bright A stars. I. A catalogue of spectral classifications | journal=Astronomical Journal | volume=74 | pages=375–406 |date=April 1969 | doi=10.1086/110819 | bibcode=1969AJ.....74..375C | postscript=. }}</ref>

<ref name=rgcrv>{{citation | last=Evans | first=D. S. | date=June 20–24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | contribution=The Revision of the General Catalogue of Radial Velocities | title=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | volume=30 | page=57 | location=University of Toronto | publisher=[International Astronomical Union](/source/International_Astronomical_Union) | bibcode=1967IAUS...30...57E | postscript=. }}</ref>

<ref name="MERMILLIOD">{{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data | year=1986 | publisher=SIMBAD | bibcode=1986EgUBV........0M | postscript=. }}</ref>

<ref name=aaa361_614>{{citation | display-authors=1 | last1=Pizzolato | first1=N. | last2=Maggio | first2=A. | last3=Sciortino | first3=S. | title=Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases | journal=Astronomy and Astrophysics | volume=361 | pages=614–628 |date=September 2000 | bibcode=2000A&A...361..614P | postscript=. }}</ref>

<ref name=aaa523_A71>{{citation | display-authors=1 | last1=Gebran | first1=M. | last2=Vick | first2=M. | last3=Monier | first3=R. | last4=Fossati | first4=L. | title=Chemical composition of A and F dwarfs members of the Hyades open cluster | journal=Astronomy and Astrophysics | volume=523 | page=A71 |date=November 2010 | bibcode=2010A&A...523A..71G | doi=10.1051/0004-6361/200913273 | arxiv=1006.5284 | s2cid=7164596 | postscript=. }}</ref>

<ref name=zorec2012>{{cite journal |last1=Zorec |first1=J. |last2=Royer |first2=F. |title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities |journal=Astronomy and Astrophysics |date=2012 |volume=537 |pages=A120 |doi=10.1051/0004-6361/201117691 |arxiv=1201.2052 |bibcode=2012A&A...537A.120Z }}</ref>

</references>

{{Stars of Taurus}}

Tauri, Rho
Category:Taurus (constellation)
Category:Delta Scuti variables
Category:A-type main-sequence stars
Category:Binary stars
Category:Hyades (star cluster)
1444
021273
028910
BD+14 0720
Tauri, 086

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Adapted from the Wikipedia article [Rho Tauri](https://en.wikipedia.org/wiki/Rho_Tauri) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Rho_Tauri?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.