Psi9 Aurigae

{{for|other stars with a similar Bayer designation|Psi Aurigae{{!}}ψ Aurigae}}

{{Starbox begin

| name = Psi⁹ Aurigae

}}

{{Starbox image

| image=

{{Location mark

|image=Auriga constellation map.svg|alt=|float=center|width=260

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=ψ⁹ Aurigae

|x=116|y=228

}}

| caption = Location of ψ⁹ Aurigae (circled)

}}

{{Starbox observe

| epoch = J2000

| ra = {{RA|06|56|32.05797}}

| dec = {{DEC|+46|16|26.3957}}

| appmag_v = 5.75

| constell = Auriga

}}

{{Starbox character

| class = B8 IIIe

| r-i =

| v-r =

| b-v = −0.06

| u-b = −0.46

| variable =

}}

{{Starbox astrometry

| radial_v = −41.1{{±|2.9}}

| prop_mo_ra = −3.263

| prop_mo_dec = +5.040

| pm_footnote =

| parallax = 3.4481

| p_error = 0.0560

| parallax_footnote =

| absmag_v = −2.03

}}

{{Starbox detail

| mass = 2.4

| radius = 3.7

| luminosity = 868

| temperature = 9,573

| gravity = 2.71

| metal_fe = −0.55

| rotational_velocity = 235

| age_myr =

}}

{{Starbox catalog

| names = {{odlist | B=ψ⁹ Aur | BD=+46 1203 | HD=50658 | HIP=33377 | HR=2568 | SAO=41446 }}

}}

{{Starbox reference

|Simbad=psi09+Aur

}}

Psi⁹ Aurigae is a star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from ψ⁹ Aurigae, and abbreviated Psi⁹ Aur or ψ⁹ Aur. This star is dimly visible to the naked eye with an apparent visual magnitude of 5.75. Based upon an annual parallax shift of {{val|3.45|ul=mas}}, the distance to this star is approximately {{Convert|950|ly|pc|abbr=off|lk=on}}. It is drifting closer to the Sun with a radial velocity of −41 km/s. This is most likely (88.5% chance) a runaway star, having a peculiar velocity of 31.8{{±|14.6|12.4}} km/s.

The spectrum of Psi⁹ Aurigae matches a giant star with a stellar classification of B8 IIIe. The 'e' suffix indicates this is a Be star that shows emission lines of hydrogen in its spectrum. This is caused by a circumstellar shell of hot gas. The emission undergoes variability on a time scale of sixteen years. This star is spinning rapidly with a projected rotational velocity of 235 km/s. It has 2.4 times the mass of the Sun and 3.7 times the Sun's radius. ψ⁹ Aur is radiating 868 times the luminosity of the Sun from its photosphere at an effective temperature of 9,573 K.

References

{{reflist|refs=

{{citation |postscript=. |bibcode=2018AJ....156..102S |title=The TESS Input Catalog and Candidate Target List | display-authors=1 |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Pepper |first3=Joshua |last4=Paegert |first4=Martin |last5=De Lee |first5=Nathan |last6=Torres |first6=Guillermo |last7=Latham |first7=David W. |last8=Charpinet |first8=Stéphane |last9=Dressing |first9=Courtney D. |last10=Huber |first10=Daniel |last11=Kane |first11=Stephen R. |last12=Lépine |first12=Sébastien |last13=Mann |first13=Andrew |last14=Muirhead |first14=Philip S. |last15=Rojas-Ayala |first15=Bárbara |last16=Silvotti |first16=Roberto |last17=Fleming |first17=Scott W. |last18=Levine |first18=Al |last19=Plavchan |first19=Peter |author20=the TESS Target Selection Working Group |journal=The Astronomical Journal |date=2018 |volume=156 |issue=3 |page=102 |doi=10.3847/1538-3881/aad050 |doi-access=free |arxiv=1706.00495 }}

{{citation |postscript=. |bibcode=2021MNRAS.507..318C |title=RGB photometric calibration of 15 million Gaia stars | display-authors=1 |last1=Cardiel |first1=Nicolás |last2=Zamorano |first2=Jaime |last3=Carrasco |first3=Josep Manel |last4=Masana |first4=Eduard |last5=Bará |first5=Salvador |last6=González |first6=Rafael |last7=Izquierdo |first7=Jaime |last8=Pascual |first8=Sergio |last9=Sánchez De Miguel |first9=Alejandro |journal=Monthly Notices of the Royal Astronomical Society |date=2021 |volume=507 |issue=1 |page=318 |doi=10.1093/mnras/stab2124 |doi-access=free |arxiv=2107.08734 }}

{{Cite XHIP

| 33377 | mode=cs2 | postscript=.}}

{{citation | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | journal=Carnegie Institute Washington D.C. Publication | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953GCRV..C......0W | postscript=. }}

{{citation | 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 | issue=1 | pages=359–365 |date=July 2002 | doi=10.1086/340590 | bibcode=2002ApJ...573..359A | postscript=. | doi-access=free }}

{{citation | last=Crawford | first=D. L. | title=U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars | journal=Astrophysical Journal | volume=137 | page=530 |date=February 1963 | doi=10.1086/147526 | bibcode=1963ApJ...137..530C | postscript=. | doi-access=free }}

{{cite simbad | title=* psi09 Aur | access-date=2012-08-23 | mode=cs2 | postscript=. }}

{{citation | 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) - Third edition - Comments and statistics | journal=Astronomy and Astrophysics | volume=367 | pages=521–524 |date=February 2001 | issue=2 | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289 | s2cid=425754 | postscript=. }}

{{citation | last=Ghosh | first=K. K. | title=Search for rapid spectral variability in Psi(9) Aurigae | journal=Publications of the Astronomical Society of the Pacific | volume=101 | pages=839–843 |date=September 1989 | doi=10.1086/132504 | bibcode=1989PASP..101..839G | postscript=. | doi-access=free }}

{{citation | postscript=.

| title=On the kinematics of a runaway Be star population

| last1=Boubert | first1=D. | last2=Evans | first2=N. W.

| journal=Monthly Notices of the Royal Astronomical Society

| volume=477 | issue=4 | pages=5261–5278 | date=July 2018

| doi=10.1093/mnras/sty980 | doi-access=free

| arxiv=1804.05849

| bibcode=2018MNRAS.477.5261B }}

}}

External links

[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%202568 HR 2568] Bright Star Catalog entry
[http://aladin.u-strasbg.fr/AladinPreview?-c=06+56+32.0573%2B46+16+26.394&ident=HD++50658&submit=Aladin+previewer φ⁹ Aurigae] image

Category:B-type giants

Category:Be stars

Category:Runaway stars

Category:Auriga

Aurigae, Psi09

2568

Category:Durchmusterung objects

050658

033377