PP Carinae

{{Starbox begin

| name = PP Carinae

}}

{{Starbox image

| image=

{{Location mark

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

|label=|position=right

|mark=Red circle.svg|mark_width=12|mark_link=p Car

|x=190|y=412

}}

|caption=Location of PP Carinae (circled)

}}

{{Starbox observe

| epoch = J2000.0

| ra = {{RA|10|32|01.46297}}

| dec = {{DEC|-61|41|07.1963}}

| appmag_v = 3.22 - 3.55

| constell = Carina

}}

{{Starbox character

| class = B4 Vne

| b-v = −0.11

| u-b = −0.71

| variable = γ Cas

}}

{{Starbox astrometry

| radial_v = +26.0

| prop_mo_ra = −17.01

| prop_mo_dec = +11.50

| parallax = 6.75

| p_error = 0.40

| parallax_footnote =

| absmag_v = −2.684

}}

{{Starbox detail

| mass = {{val|7.6|0.1}}

| radius = {{val|7.95|0.16}}

| metal_fe =

| gravity = {{val|2.96|0.03}}

| age_myr = {{val|39.8|7.6}}

| luminosity = 5,212

| temperature = {{val|17410|174|fmt=commas}}

| rotational_velocity = {{val|280|6}}

}}

{{Starbox catalog

| names = p Carinae, PP Carinae, CP−61°1704, FK5 397, HD 91465, HIP 51576, HR 4140, SAO 251006

}}

{{Starbox reference

|Simbad=HD+91465

}}

p Carinae is a star in the southern constellation of Carina. It has the variable star designation PP Carinae and, at an apparent visual magnitude of +3.3, is readily visible to the naked eye from the southern hemisphere. From the observed parallax shift of this star as the Earth orbits the Sun, its distance can be estimated as roughly {{Convert|480|ly|pc|abbr=off|lk=on}} with a 6% margin of error. It is considered to be a member of the open cluster IC 2602 although it lies well outside the core visible group of stars.

File:PPCarLightCurve.png for PP Carinae, plotted from TESS data]]

The star is a B-type main sequence star with a stellar classification of B4 Vne. The 'ne' suffix indicates it is a rapidly rotating Be star that is surrounded by hot circumstellar gas. This material adds emission lines to the spectrum of the star. It has a projected rotational velocity of {{nowrap|325 km s⁻¹}}, with about 7.6 times the mass and eight times the radius of the Sun. Alan William James Cousins announced the discovery that this star is a variable star, in 1951. This star is classified as a Gamma Cassiopeiae-type variable and its brightness varies from magnitude +3.22 to +3.55.

In most versions of its asterism, the neighbouring bright stars, thus plotted along the imaginary hull forming Carina are Theta Carinae, to the south, and V337 (also known as lower case q) Carinae to the east, of second and third magnitude respectively.

References

{{reflist|refs=

{{cite web |title=MAST: Barbara A. Mikulski Archive for Space Telescopes |url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html |publisher=Space Telescope Science Institute |access-date=8 December 2021}}

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

{{cite journal |bibcode=2018MNRAS.474.5287A |title=Stellar parameters and H α line profile variability of be stars in the BeSOS survey |journal=Monthly Notices of the Royal Astronomical Society |volume=474 |issue=4 |pages=5287 |last1=Arcos |first1=C. |last2=Kanaan |first2=S. |last3=Chávez |first3=J. |last4=Vanzi |first4=L. |last5=Araya |first5=I. |last6=Curé |first6=M. |year=2018 |arxiv=1711.08675 |doi=10.1093/mnras/stx3075 |doi-access=free }}

{{cite journal | last1=Houk | first1=Nancy | title=Michigan catalogue of two dimensional spectral types for the HD stars | journal=University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0 | volume=1 | location=Ann Arbor | publisher=Dept. of Astronomy, University of Michigan | year=1978 | bibcode=1975mcts.book.....H }}

{{cite journal | display-authors=1 | title=Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions | journal=Veröff. Astron. Rechen-Inst. Heidelb | volume=35 | last1=Wielen | first1=R. | last2=Schwan | first2=H. | last3=Dettbarn | first3=C. | last4=Lenhardt | first4=H. | last5=Jahreiß | first5=H. | last6=Jährling | first6=R. | publisher=Astronomisches Rechen-Institut Heidelberg | issue=35 | year=1999 | page=1 | bibcode=1999VeARI..35....1W }}

{{cite journal | last1=Bernacca | first1=P. L. | last2=Perinotto | first2=M. | title=A catalogue of stellar rotational velocities | journal=Contributi Osservatorio Astronomico di Padova in Asiago | volume=239 | issue=1 | year=1970 | bibcode=1970CoAsi.239....1B }}

{{cite journal | last1=Feinstein | first1=A. | last2=Marraco | first2=H. G. | title=The photometric behavior of Be Stars | journal=Astronomical Journal | volume=84 | pages=1713–1725 |date=November 1979 | doi=10.1086/112600 | bibcode=1979AJ.....84.1713F | doi-access=free }}

{{cite journal | last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M. | 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 | doi=10.1111/j.1365-2966.2010.17434.x | doi-access=free | bibcode=2011MNRAS.410..190T |arxiv = 1007.4883 | s2cid=118629873 }}

{{cite journal|bibcode=2014A&A...566A.132S|title=Accurate age determinations of several nearby open clusters containing magnetic Ap stars|journal=Astronomy & Astrophysics|volume=566|pages=A132|last1=Silaj|first1=J|last2=Landstreet|first2=J. D|year=2014|doi=10.1051/0004-6361/201321468|arxiv=1407.4531|s2cid=53370832}}

{{cite web|url=https://www.aavso.org/vsx/index.php?view=detail.top&oid=6067|title=VSX: Detail for PP Carinae|author=Otero, Sebastian Alberto|date=15 April 2012|work=The International Variable Star Index|publisher=American Association of Variable Star Observers|access-date=2018-01-05}}

{{cite journal |last1=Cousins |first1=A. W. J. |title=Bright variable stars in southern hemisphere (first list) |journal=The Observatory |date=October 1951 |volume=71 |pages=199-201 |bibcode=1951Obs....71..199C }}

}}

Carinae, p

Category:B-type main-sequence stars

Category:Carina (constellation)

Category:Gamma Cassiopeiae variable stars