[[15][9]]Nomenclature
AR Cassiopeiae was frequently referred to as IH Cas (or IH Cas) in some literature.[10] The origin of the designation "IH Cassiopeiae" is from the 17th century catalogue and constellation map by Johannes Hevelius, which was kept in use due to the lack of a Flamsteed designation or Bayer designation for the star.[10] It was the first star in Cassiopeia that Flamsteed's edition of Hevelius catalogued,[32] thus "1 Hev. Cas" or "1 H. Cas" (similar to Gould designations), which becomes IH Cas through corruption.[10]
Properties
The primary subsystem, AR Cassiopeiae AB, is a triple. AR Cassiopeiae B is located 0.800″ away from AR Cassiopeiae A.[15] AR Cassiopeiae A itself an Algol-type eclipsing binary[6] with an orbital period of about 6.07 days.[8] Its primary is a B-type main-sequence star, and the secondary, an A-type main-sequence star. The secondary star may be an Am star as well.[8]
Farther out are two other stars, designated AR Cassiopeiae C and D, respectively. They are 76.1″ (or about 1.27′) away from the central system.[15] Their combined spectrum matches that of another B-type main-sequence star.[4] This pair is also designated HD 221237.[4] 67.2″ (1.12′) away from AR Cassiopeiae AB is another pair of stars, F and G, both F-type stars.[15] All four of these stars are known to be common proper motion companions.[15]
References
1. ^WikiSky, "HD 221253" (accessed 2010-10-27)
2. ^1 2 3 4 {{cite journal|title=Validation of the new Hipparcos reduction|author=van Leeuwen, F.|display-authors=etal|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653–664|date=2007|arxiv=0708.1752|bibcode=2007A&A...474..653V|doi=10.1051/0004-6361:20078357}}
3. ^1 {{cite journal|bibcode=2016A&A...595A...2G|doi=10.1051/0004-6361/201629512|arxiv=1609.04172|title=Gaia Data Release 1|journal=Astronomy & Astrophysics|volume=595|pages=A2|year=2016|author=Gaia Collaboration}}
4. ^1 2 3 {{cite simbad|title=HD 221237|accessdate=23 August 2017}}
5. ^1 2 3 {{cite journal|author1=Mermilliod, J.-C.|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|journal=Catalogue of Eggen's UBV data|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1|date=1986|bibcode= 1986EgUBV........0M}}
6. ^1 2 {{cite simbad|title=V* AR Cas|accessdate=23 August 2017}}
7. ^{{cite journal|title=General catalogue of stellar radial velocities|journal=Washington|author=Wilson, Ralph Elmer|date=1953|bibcode=1953GCRV..C......0W}}
8. ^1 2 3 4 5 6 7 8 9 {{cite journal|bibcode=1999A&A...345..855H|title=Search for forced oscillations in binaries. III. Improved elements and the detection of line-profile variability of the B4V + A6V: system AR Cassiopeiae|journal=Astronomy and Astrophysics|volume=345|pages=855|author1=Holmgren|first1=D. E.|last2=Hadrava|first2=P.|last3=Harmanec|first3=P.|last4=Eenens|first4=P.|last5=Corral|first5=L. J.|last6=Yang|first6=S.|last7=Ak|first7=H.|last8=Bozić|first8=H.|year=1999}}
9. ^{{cite book|publisher=Springer-Verlag|title=Observing and Measuring Visual Double Stars|series=Patick Moore's Practical Astronomy Series|editor=Bob Argyle|isbn=1-85233-558-0|page=9|date=2004}}
10. ^1 2 {{cite journal|bibcode=1986Obs...106...40S|title=1H. Cas = AR Cas|author=Somerville, W. B.|journal=The Observatory|volume=106|pages=40–42|date=1986}}
11. ^1 2 3 4 5 6 {{Cite journal | doi = 10.1051/aas:1997181| title = MSC - a catalogue of physical multiple stars| journal = Astronomy and Astrophysics Supplement Series| volume = 124| pages = 75| year = 1997| last1 = Tokovinin | first1 = A. A.|bibcode = 1997A&AS..124...75T }}
12. ^1 {{Cite journal | | title = Johannis Hevelii Catalogus Stellarum Fixarum Ad Annum Christi 1660 completum | journal = Historia Coelestis Britannica | volume = 3 | pages = 54 | year = 1725 | last1 = Flamsteed | first1 = J., ed. }}