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139 Tauri

{{Short description|Star in the constellation Taurus}}

{{Starbox begin

| name = 139 Tauri

}}

{{Starbox observe

| epoch = J2000

| constell = Taurus

| ra = {{RA|05|57|59.65632}}

| dec = {{DEC|+25|57|14.0799}}

| appmag_v = 4.81

}}

{{Starbox character

| class = B1 Ib or B0.5 II

| b-v = {{Val|−0.088|0.003}}

| u-b =

| r-i =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|+8.0|4.2}}

| prop_mo_ra = −2.06

| prop_mo_dec = −1.95

| parallax = 2.10

| p_error = 0.19

| parallax_footnote =

| absmag_v = −4.4

}}

{{Starbox detail

| source =

| mass = {{Val|10.1|1.0}}

| radius = 20.7

| luminosity = 81,000

| gravity = {{Val|3.559|0.059}}

| temperature = {{Val|24660|1620|fmt=commas}}

| metal_fe =

| rotational_velocity = 140

| age_myr = {{Val|22.5|2.6}}

}}

{{Starbox catalog

| names = {{odlist | F=139 Tau | BD=+25°1052 | FK5= | HD=40111 | HIP=28237 | HR=2084 | SAO=77775 }}

}}

{{Starbox reference

| Simbad = 139+Tau

}}

{{Starbox end}}

139 Tauri is a single, blue-white hued star in the zodiac constellation of Taurus. It is faintly visible to the naked eye with an apparent visual magnitude of 4.81. The distance to this star, as determined from an annual parallax shift of {{Val|2.10|0.19|ul=mas}}, is roughly 1,600 light years. Because this star is located near the ecliptic, it is subject to occultations by the Moon. One such event was observed April 28, 1990.

This is a massive B-type lower-luminosity supergiant or bright giant star with a stellar classification of B1 Ib or B0.5 II, respectively. It is around 22.5 million years old with a high rate of spin, showing a projected rotational velocity of 140 km/s. J. D. Rosendhal (1973) identified weak emission features associated with an asymmetric H-alpha absorption line, providing evidence of mass loss. The star has about 10 times the mass of the Sun and around 20 times the Sun's radius. It is radiating over 80,000 times the Sun's luminosity from its photosphere at an effective temperature of around 24,660 K. Stars such as this with 10 or more solar masses are expected to end their life by exploding as a Type II supernova.

References

{{reflist|refs=

{{cite simbad | title=139 Tau | access-date=2018-03-30 }}

{{citation

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| arxiv=0708.1752 | bibcode=2007A&A...474..653V

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{{citation

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| journal=The Astronomical Journal

| volume=130 | issue=4 | date=June 28, 2005

| pages=1652–1657

| doi=10.1086/444474 | arxiv=astro-ph/0506708

| bibcode=2005AJ....130.1652R | s2cid=119515135

| postscript=. }}

{{citation

| title=A survey of H-alpha emission in early-type high-luminosity stars

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| journal=Astrophysical Journal | postscript=.

| volume=186 | page=909 | date=December 1973

| doi=10.1086/152555 | bibcode=1973ApJ...186..909R }}

{{citation

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| title=Observations of lunar occultations at Observatoire de la Cote d'Azur

| journal=Astronomy and Astrophysics Supplement

| volume=110 | pages=107 | year=1995

| bibcode=1995A&AS..110..107M

| postscript=. }}

{{citation

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| title=A catalogue of multiplicity among bright stellar systems

| journal=Monthly Notices of the Royal Astronomical Society

| volume=389 | issue=2 | pages=869–879 | date=September 2008

| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E

| postscript=. | arxiv=0806.2878 | s2cid=14878976 }}

{{citation

| title=Fundamental parameters of B supergiants from the BCD system. I. Calibration of the (λ1, D) parameters into Teff

| journal=Astronomy and Astrophysics

| display-authors=1 | last1=Zorec | first1=J.

| last2=Cidale | first2=L. | last3=Arias | first3=M. L.

| last4=Frémat | first4=Y. | last5=Muratore | first5=M. F.

| last6=Torres | first6=A. F. | last7=Martayan | first7=C.

| volume=501 | pages=297–320 | year=2009

| issue=1

| doi=10.1051/0004-6361/200811147 | bibcode=2009A&A...501..297Z

| arxiv = 0903.5134 | s2cid=14969137

}}

{{citation

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| title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun

| journal=Monthly Notices of the Royal Astronomical Society

| volume=410 | issue=1 | pages=190–200 | date=January 2011

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{{citation

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| journal=Astronomy & Astrophysics

| volume=562 | pages=A135 | year=2014

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{{cite journal

| doi=10.1086/158835 | bibcode=1981ApJ...245..593L| title=Mass loss from O and B stars| journal=The Astrophysical Journal| volume=245| pages=593| year=1981| last1=Lamers| first1=H. J. G. L. M| doi-access=free}}

{{cite journal

| doi=10.1002/asna.200310081 | bibcode=2003AN....324..219W| title=The total-to-selective extinction ratio determined from near IR photometry of OB stars| journal=Astronomische Nachrichten| volume=324| issue=3| pages=219–237| year=2003| last1=Wegner| first1=W}}

}}

{{Stars of Taurus}}

{{DEFAULTSORT:139 Tauri}}

Category:B-type bright giants

Category:Emission-line stars

Category:Taurus (constellation)

Category:Durchmusterung objects

Tauri, 139

040111

028237

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