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UX Antliae

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

{{Starbox begin

| name=UX Antliae

}}

{{Starbox image

| image = 250px

| caption = The visual band light curve of UX Antliae, from AAVSO data

}}

{{Starbox observe

| epoch=J2000.0

| ra={{RA|10|57|9.051}}

| dec={{DEC|-37|23|55.06}}

| appmag_v=11.85 - 18.0

| constell=Corona Borealis

}}

{{Starbox character

| class=C(F)

| b-v=

| u-b=

| v-r=

| j-h=

| j-k=

| variable=R CrB}}

{{Starbox astrometry

| radial_v=27.83

| prop_mo_ra=-3.8

| prop_mo_dec=2.3

| parallax=

| p_error=

| parallax_footnote=

| dist_pc=~25,000

| dist_ly=

| absmag_v=~−5

}}

{{Starbox detail

| mass=0.722

| radius=

| luminosity=

| temperature=7,000

| metal=

| gravity=0.5

| rotation=

| age=

}}

{{Starbox catalog

| names=2MASS J10570905-3723550, TYC 7212-77-1, HV 10108, DENIS-P J105709.0-372354, GSC 07212-00077, GSC2 S1303203939, AAVSO 1052-36

}}

{{Starbox reference

| Simbad=UX+Ant

}}

{{Starbox end}}

UX Antliae is a post-AGB and R Coronae Borealis variable star that has a base apparent magnitude of around 11.85, with irregular dimmings down to below magnitude 18.0.

Researchers David Kilkenny and J.E. Westerhuys of the South African Astronomical Observatory confirmed that UX Antliae was an R Coronae Borealis variable in 1990 after noting the similarity of its spectrum to the RCB star W Mensae. It had been suspected of being one since 1940, but had been little-studied and exhibited no characteristic declines between 1975 and 1990.

Assuming that its absolute magnitude is around -5, it has been estimated as lying 25000 parsecs distant from Earth. Kilkenny and Westerhuys noted that its spectrum fit with that of a star of spectral class F, although was deficient in hydrogen. It has around 70% the mass of the Sun and an effective (surface) temperature of around 7000 K.

See also

References

{{reflist|refs=

{{cite journal|bibcode=2006A&A...450..701S|title=Post-AGB stars as testbeds of nucleosynthesis in AGB stars|journal=Astronomy and Astrophysics|volume=450|issue=2|pages=701|last1=Stasińska|first1=G.|last2=Szczerba|first2=R.|last3=Schmidt|first3=M.|last4=Siódmiak|first4=N.|date=2006|doi=10.1051/0004-6361:20053553|arxiv = astro-ph/0601504 |s2cid=12040452}}

{{cite journal|author=Lawson, W. A.|author2=Cottrell, P. L.|author3=Kilkenny, D.|author4=Gilmore, A. C.|author5=Kilmartin, P. M.|title=The Variability of the R-Coronae Star Ux-Antliae at Maximum Light|journal=Mon. Not. R. Astron. Soc.|volume=271|issue=4|pages=919–23|date=1994|bibcode=1994MNRAS.271..919L|last6=Marang|last7=Roberts|last8=Van Wyk|doi=10.1093/mnras/271.4.919|doi-access=free}}

{{cite journal|author=Kilkenny, D.|author2=Westerhuys, J. E. |date=1990|title= Spectroscopy of 'RCB' stars-IV. UX ANT |journal= The Observatory|volume=110 |pages=90–92|bibcode = 1990Obs...110...90K }}

{{ cite web | title= V4199 Sgr | work=The International Variable Star Index | url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=31899| author=Otero, Sebastian | date=23 November 2012 | access-date=14 July 2014}}

{{cite journal|bibcode=2006A&A...450..701S|title=Post-AGB stars as testbeds of nucleosynthesis in AGB stars|journal=Astronomy and Astrophysics|volume=450|issue=2|pages=701|last1=Stasińska|first1=G.|last2=Szczerba|first2=R.|last3=Schmidt|first3=M.|last4=Siódmiak|first4=N.|date=2006|doi=10.1051/0004-6361:20053553|arxiv = astro-ph/0601504 |s2cid=12040452}}

{{cite journal|bibcode=2007AJ....133.2524W|title=High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun|journal=The Astronomical Journal|volume=133|issue=6|pages=2524|last1=White|first1=Russel J.|last2=Gabor|first2=Jared M.|last3=Hillenbrand|first3=Lynne A.|date=2007|doi=10.1086/514336|arxiv = 0706.0542 |s2cid=122854}}

{{ cite web | title= UX Antliae | work=The International Variable Star Index | url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=31899| author=Otero, Sebastian | date=23 November 2012 | access-date=14 July 2014}}

{{cite journal|bibcode=2000A&A...355L..27H|title=The Tycho-2 catalogue of the 2.5 million brightest stars|journal=Astronomy and Astrophysics|volume=355|pages=L27|last1=Høg|first1=E.|last2=Fabricius|first2=C.|last3=Makarov|first3=V. V.|last4=Urban|first4=S.|last5=Corbin|first5=T.|last6=Wycoff|first6=G.|last7=Bastian|first7=U.|last8=Schwekendiek|first8=P.|last9=Wicenec|first9=A.|date=2000|doi=10.1888/0333750888/2862}}

{{cite web |title=Download Data |url=https://www.aavso.org/data-download |website=aavso.org |publisher=AAVSO |access-date=1 October 2021}}

{{cite journal|bibcode=2012ApJ...747..102H|title=The Galactic R Coronae Borealis Stars: The C2 Swan Bands, the Carbon Problem, and the 12C/13C Ratio|journal=The Astrophysical Journal|volume=747|issue=2|pages=102|last1=Hema|first1=B. P.|last2=Pandey|first2=Gajendra|last3=Lambert|first3=David L.|date=2012|doi=10.1088/0004-637X/747/2/102|arxiv = 1201.1357 |s2cid=118653032}}

}}

External links

{{cite web | url=http://www.ncac.torun.pl/postagb?lang=en&branch=postagbworld&id=2&l=279.064&b=20.12 | title=Post-AGB Object 279.064 +20.120 | work=www.ncac.torun.pl }}

{{cite web | url=http://www.kusastro.kyoto-u.ac.jp/vsnet/LCs/index/ANTUX.html | title=Light Curve of UX Ant | work=www.kusastro.kyoto-u.ac.jp }}

{{Stars of Antlia}}

{{DEFAULTSORT:UX Antliae}}

Category:Antlia

Category:R Coronae Borealis variables

Antliae, UX

J10570905-3723550