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31 Persei

{{short description|Star in the constellation Perseus}}

{{Starbox begin}}

{{Starbox image

| image =

{{Location mark

|image=Perseus constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=31 Persei

|x=574|y=412

}}

| caption = Location of 31 Persei (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Perseus

| ra = {{RA|03|19|07.63796}}

| dec = {{DEC|50|05|41.8724}}

| appmag_v = 5.05

}}

{{Starbox character

| type =

| class = B5V

| b-v = −0.06

| u-b = −0.53

| variable =

}}

{{Starbox astrometry

| radial_v = −1.60

| prop_mo_ra = +23.580

| prop_mo_dec = −23.322

| parallax = 5.8399

| p_error = 0.1792

| parallax_footnote =

| absmag_v = −1.44

}}

{{Starbox detail

| mass = 4.647

| radius = 3.4

| temperature = 15,301

| luminosity = 950

| rotational_velocity = 260

| gravity =

| metal_fe = 0.00

| age_myr = 234

}}

{{Starbox catalog

| names = {{odlist | F=31 Per | BD=+49°902 | FK5= | GC=3945 | HD=20418 | HIP=15444 | HR=989 | SAO=38714 }}

}}

{{Starbox reference

| Simbad = 31+Per

}}

{{Starbox end}}

31 Persei is a single star in the northern constellation of Perseus. It is visible to the naked eye as a dim, blue-white hued point of light with an apparent visual magnitude of 5.05. This star is located around {{convert|172|pc|ly}} away from the Sun, and it is drifting closer with a radial velocity of −1.6 km/s. It is likely a member of the Alpha Persei Cluster.

This object is a massive B-type main-sequence star with a stellar classification of B5V and it is currently generating energy through hydrogen fusion at its core. It is around 234 million years old and is spinning rapidly with a projected rotational velocity of 260 km/s. The star has 4.6 times the mass of the Sun and about 3.4 times the radius of the Sun. It is radiating 950 times the luminosity of the Sun from its photosphere at an effective temperature of 15,301 K.

References

{{reflist|refs=

{{cite DR2|442501619995081088}}

{{cite simbad | title=31 Per | access-date=2019-07-13 }}

{{cite journal

| display-authors=1 | last1=Pasinetti Fracassini | first1=L. E.

| last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A.

| title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)

| edition=Third | journal=Astronomy and Astrophysics

| volume=367 | issue=2 | pages=521–524 | date=February 2001

| bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289

| doi=10.1051/0004-6361:20000451 | s2cid=425754 }}

{{cite journal

| title=The binary fraction and mass segregation in Alpha Persei open cluster

| last1=Sheikhi | first1=Najmeh | last2=Hasheminia | first2=Maryam

| last3=Khalaj | first3=Pouria | last4=Haghi | first4=Hosein

| last5=Zonoozi | first5=Akram Hasani | last6=Baumgardt | first6=Holger

| display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society

| volume=457 | issue=1 | pages=1028–1036 | date=March 2016

| doi=10.1093/mnras/stw059 | doi-access=free | arxiv=1601.02186

| bibcode=2016MNRAS.457.1028S }}

{{cite journal

| title=Stellar Membership and Dusty Debris Disks in the α Persei Cluster

| display-authors=1 | last1=Zuckerman | first1=B.

| last2=Melis | first2=Carl | last3=Rhee | first3=Joseph H.

| last4=Schneider | first4=Adam | last5=Song | first5=Inseok

| journal=The Astrophysical Journal

| volume=752 | issue=1 | id=58 | pages=12 | date=June 2012

| arxiv=1204.3950 | bibcode=2012ApJ...752...58Z

| doi=10.1088/0004-637X/752/1/58 | s2cid=119207634 }}

{{cite journal

| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.

| 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

| bibcode=2008MNRAS.389..869E | arxiv=0806.2878

| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | s2cid=14878976 }}

{{cite journal

| title=Spatial distribution and kinematics of OB stars

| last1=Gontcharov | first1=G. A.

| journal=Astronomy Letters

| volume=38 | issue=11 | pages=694–706 | date=November 2012

| bibcode=2012AstL...38..694G | arxiv=1606.09028

| doi=10.1134/S1063773712110035 | s2cid=119108982 }}

{{cite journal

| title=Dependence of kinematics on the age of stars in the solar neighborhood

| journal=Astronomy Letters

| volume=38 | issue=12 | pages=771–782 | year=2012

| last1=Gontcharov | first1=G. A.

| bibcode=2012AstL...38..771G | arxiv=1606.08814

| doi=10.1134/S1063773712120031

| s2cid=118345778

}} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/PAZh/38/860/thin&HIP=15444 Vizier catalog entry]

{{cite journal

| display-authors=1 | last1=Abt | first1=Helmut A.

| last2=Levato | first2=Hugo | last3=Grosso | first3=Monica

| title=Rotational Velocities of B Stars

| journal=The Astrophysical Journal

| volume=573 | pages=359–365 | year=2002

| issue=1 | bibcode=2002ApJ...573..359A | doi=10.1086/340590 | doi-access=free }}

{{cite journal

| last1=Silaj | first1=J. | last2=Landstreet | first2=J. D.

| title=Accurate age determinations of several nearby open clusters containing magnetic Ap stars

| journal=Astronomy & Astrophysics

| volume=566 | pages=A132 | year=2014

| bibcode=2014A&A...566A.132S | arxiv=1407.4531

| doi=10.1051/0004-6361/201321468 | s2cid=53370832 }}

{{Cite journal

| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system

| journal=Astronomy Letters

| volume=32 | issue=11 | pages=759–771 | year=2006

| last1=Gontcharov | first1=G. A.

| bibcode=2006AstL...32..759G | arxiv=1606.08053

| doi=10.1134/S1063773706110065 | s2cid=119231169

}}

{{cite journal

| last1=Mallama | first1=A.

| title=Sloan Magnitudes for the Brightest Stars

| journal=The Journal of the American Association of Variable Star Observers

| volume=42 | pages=443 | year=2014

| issue=2

| bibcode=2014JAVSO..42..443M

}}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/other/JAVSO/42.443/ugriz&HD=020418 Vizier catalog entry]

{{cite journal

| last1=Hoffleit | first1=D. | last2=Warren | first2=W. H.

| title=VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)

| journal=VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H

| volume=5050 | year=1995

| bibcode=1995yCat.5050....0H }}

{{cite journal

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| title=XHIP: An extended hipparcos compilation

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015

| s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=15444 Vizier catalog entry]

{{cite journal

| last1=Van Leeuwen | first1=F.

| title=Validation of the new Hipparcos reduction

| journal=Astronomy and Astrophysics

| volume=474 | issue=2 | pages=653–664 | year=2007

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

| doi=10.1051/0004-6361:20078357

| s2cid=18759600

}} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2015444 Vizier catalog entry]

}}

{{Stars of Perseus}}

{{DEFAULTSORT:31 Persei}}

Category:B-type main-sequence stars

Category:Alpha Persei Cluster

Category:Perseus (constellation)

BD+49 902

Persei, 31

020418

015444

0989