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Kappa Cassiopeiae

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

{{Starbox begin

| name = κ Cassiopeiae

}}

{{Starbox image

| image=

{{Location mark

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

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=κ Cas

|x=490|y=436

}}

|caption=Location of κ Cassiopeiae (circled)

}}

{{Starbox observe

| epoch = J2000.0

| constell = Cassiopeia

| pronounce =

| ra = {{RA|00|32|59.991}}

| dec = {{DEC|+62|55|54.42}}

| appmag_v = 4.12 - 4.21

}}

{{Starbox character

| class = BC0.7 Ia

| appmag_1_passband = U

| appmag_1 = 3.50

| appmag_2_passband = B

| appmag_2 = 4.276

| appmag_3_passband = J

| appmag_3 = 4.141

| appmag_4_passband = H

| appmag_4 = 4.148

| appmag_5_passband = K

| appmag_5 = 4.013

| appmag_6_passband =

| appmag_6 =

| appmag_7_passband =

| appmag_7 =

| appmag_8_passband =

| appmag_8 =

| r-i =

| v-r =

| b-v = +0.0869

| u-b = −0.776

| j-h = −0.0069

| j-k = +0.128

| variable=α Cyg

}}

{{Starbox astrometry

| radial_v = 0.30

| prop_mo_ra = +3.65

| prop_mo_dec = −2.07

| parallax = 0.73

| p_error = 0.17

| parallax_footnote =

| absmag_v = −7.1

}}

{{Starbox detail

| source =

| mass = 33

| radius = 39

| gravity = 2.79

| luminosity = 490,000

| temperature = 24,600

| metal =

| rotation =

| rotational_velocity = 58

| age_myr = 4.5

}}

{{Starbox catalog

| names = 15 Cassiopeiae, HR 130, HD 2905, BD+62°102, FK5 16, HIP 2599, SAO 11256, GC 645, MWC 7

}}

{{Starbox reference

|Simbad=Kappa+Cassiopeia

}}

{{Starbox end}}

File:Kappa Cassiopeiae.jpg infrared image (NASA/JPL-Caltech)]]

Kappa Cassiopeiae (κ Cas, κ Cassiopeiae) is a star in the constellation Cassiopeia.

κ Cassiopeiae has an unusual spectrum that has anomalously weak nitrogen lines, taken as an actual nitrogen deficiency in the atmosphere. This is indicated by the modified letter C on the assumption that it is also carbon-rich, although this might not actually be the case. It is also interpolated to BC0.7, being slightly hotter than a standard B1 star.

κ Cassiopeiae is assumed to be a member of the Cassiopeia OB14 stellar association (Cas OB14) and treated as being at a distance of about {{val|1,100|ul=pc|fmt=commas}}, while its distance found from the Hipparcos parallax is about 1,400 parsecs. Its Gaia parallaxes are somewhat uncertain due to the brightness of the star, but a modern determination of the distance to Cas OB14 is {{val|880|u=pc}}.

File:KappaCasLightCurve.png for Kappa Cassiopeiae, plotted from Hipparcos data]]

It is classified as an Alpha Cygni type variable star and its brightness varies by a few hundredths of a magnitude. Periods of two hours, 2.65 days, and nine days have been reported from observations at different times.

It is a runaway star. Its magnetic field and wind of particles creates a visible bow shock 4 light-years ahead of it, colliding with the diffuse, and usually invisible, interstellar gas and dust. This is about the same distance that Earth is from Proxima Centauri, the nearest star to the Sun. The dimensions of the bow shock are vast: around 12 light-years long and 1.8 light-years wide.

{{clear left}}

References

{{reflist|refs=

{{cite journal

| title=Internal motions in OB associations with Gaia DR2

| last1=Melnik | first1=A. M. | last2=Dambis | first2=A. K.

| journal=Monthly Notices of the Royal Astronomical Society

| volume=493 | issue=2 | pages=2339–2351

| date=April 2020 | doi=10.1093/mnras/staa454

| doi-access=free | arxiv=2002.05044 | bibcode=2020MNRAS.493.2339M }}

{{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=2018A&A...612A..40S |title=Low-frequency photospheric and wind variability in the early-B supergiant HD 2905 |last1=Simón-Díaz |first1=S. |last2=Aerts |first2=C. |last3=Urbaneja |first3=M. A. |last4=Camacho |first4=I. |last5=Antoci |first5=V. |last6=Fredslund Andersen |first6=M. |last7=Grundahl |first7=F. |last8=Pallé |first8=P. L. |journal=Astronomy and Astrophysics |year=2018 |volume=612 |pages=A40 |doi=10.1051/0004-6361/201732160 |arxiv=1711.08994 |s2cid=20158464 }}

{{cite web

| url=https://www.aavso.org/vsx/index.php?view=detail.top&oid=7293

| title=kappa Cas

| website=Omternational Variable Star Index

| publisher=AAVSO

| access-date=2022-08-13}}

{{cite journal

| bibcode=2008A&A...481..777S|arxiv=0801.4289

| title=Quantitative studies of the optical and UV spectra of Galactic early B supergiants. I. Fundamental parameters

| journal=Astronomy and Astrophysics|volume=481|issue=3|pages=777|last1=Searle|first1=S. C.

| last2=Prinja|first2=R. K.|last3=Massa|first3=D.|last4=Ryans|first4=R.|year=2008

| doi=10.1051/0004-6361:20077125|s2cid=1552752}}

{{cite journal

| bibcode=2002MNRAS.331...45K

| title=New periodic variables from the Hipparcos epoch photometry

| journal=Monthly Notices of the Royal Astronomical Society|volume=331|pages=45–59|last1=Koen|first1=Chris|last2=Eyer|first2=Laurent

| year=2002| issue=1

|doi=10.1046/j.1365-8711.2002.05150.x| doi-access=free

|arxiv = astro-ph/0112194 |s2cid=10505995}}

{{cite web

| last=Clavin|first=Whitney

| title=The bow shock of Kappa Cassiopeiae, a massive, hot supergiant

| date=21 February 2014|url=http://phys.org/news/2014-02-kappa-cassiopeiae-massive-hot-supergiant.html

| publisher=Phys.org|access-date=6 December 2016}}

>{{cite journal

| bibcode=2009A&A...499..291K

| title=Parameters of galactic early B supergiants. The influence of the wind on the interstellar extinction determination

| journal=Astronomy and Astrophysics|volume=499|pages=291|last1=Kraus|first1=M.|last2=Borges Fernandes|first2=M.

| last3=Kubát|first3=J.|year=2009| issue=1

|doi=10.1051/0004-6361/200810319|doi-access=free}}

{{cite journal

| bibcode=1971ApJS...23..257W

| title=Some Spectroscopic Characteristics of the OB Stars: An Investigation of the Space Distribution of Certain OB Stars and the Reference Frame of the Classification

| journal=Astrophysical Journal Supplement|volume=23|pages=257|last1=Walborn|first1=Nolan R.|author1-link=Nolan R. Walborn

| year=1971|doi=10.1086/190239|doi-access=free}}

{{cite journal

| bibcode=2012A&A...538A.108P

| title=E-BOSS: An Extensive stellar BOw Shock Survey. I. Methods and first catalogue

| journal=Astronomy & Astrophysics |volume=538 |pages=A108 |last1=Peri |first1=C. S.

| last2=Benaglia |first2=P. |last3=Brookes |first3=D. P. |last4=Stevens |first4=I. R.

| last5=Isequilla |first5=N. L. |year=2012 |doi=10.1051/0004-6361/201118116 |arxiv = 1109.3689

| s2cid=62840857 }}

{{cite journal

| bibcode=1971ApJ...164L..67W

| title=On the Existence of OB Stars with Anomalous Nitrogen and Carbon Spectra

| journal=Astrophysical Journal|volume=164|pages=L67|last1=Walborn|first1=Nolan R.

| year=1971|doi=10.1086/180693}}

{{cite journal

| bibcode=1979IBVS.1697....1E

| title=Spectroscopic and Photometric Variation of kappa Cas

| journal=Information Bulletin on Variable Stars|volume=1697|pages=1|last1=Elst|first1=E. W.|year=1979}}

{{cite journal

| bibcode=1981IBVS.1946....1P

| title=Photometric Variability of kappa Cassiopeiae

| journal=Information Bulletin on Variable Stars|volume=1946|pages=1|last1=Percy|first1=J. R.|year=1981}}

{{cite journal

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

| 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

| last1= Gontcharov |first1= G. A. |year= 2006 |doi= 10.1134/S1063773706110065

| arxiv = 1606.08053 |s2cid= 119231169 }}

{{cite journal

| title=Validation of the new Hipparcos reduction

| last1=van Leeuwen | first1=F. | 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://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=2593 Vizier catalog entry ]

{{cite journal

| bibcode=2009yCat....102025S

| title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)

| journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S

| volume=1|display-authors=etal|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}

{{cite journal

| bibcode=2002yCat.2237....0D

| title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system

| journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|last1=Ducati|first1=J. R.|year=2002}}

{{cite web |title=Light Curve |url=https://www.cosmos.esa.int/web/hipparcos/java-tools/light-curve |website=Hipparcos ESA |publisher=ESA |access-date=17 February 2022}}

{{cite journal | last1 = Anderson | first1 = E. | last2 = Francis | first2 = Ch. | title = XHIP: An extended hipparcos compilation | journal = Astronomy Letters | date = May 2012 | volume = 38 | issue = 5 | pages = 331–346 | issn = 1063-7737 | eissn = 1562-6873 | doi = 10.1134/S1063773712050015 | bibcode = 2012AstL...38..331A | arxiv = 1108.4971| s2cid = 119257644 }}

}}

{{Stars of Cassiopeia}}

Category:Alpha Cygni variables

Cassiopeiae, Kappa

Cassiopeiae, 15

Category:B-type supergiants

Category:Cassiopeia (constellation)

Category:Runaway stars

0130

002905

002599

BD+62 0102