Omega Andromedae
Template:Short description Template:Starbox begin Template:Starbox image Template:Starbox observe Template:Starbox character Template:Starbox astrometry Template:Starbox detail Template:Starbox catalog Template:Starbox reference Template:Starbox end
Omega Andromedae (ω And, ω Andromedae) is the Bayer designation for a slowly co-rotatingTemplate:Failed verification binary star system[1] in the northern constellation of Andromeda. Parallax measurements made during the Gaia mission make this system to be approximately Template:Convert from Earth. Its apparent visual magnitude is +4.83,[2] which makes it bright enough to be seen with the naked eye.
The primary component has a stellar classification of F5 IVe.[3] The IV luminosity class indicates that it is probably a subgiant star that is in the process of evolving away from the main sequence as the supply of hydrogen at its core depletes. However, Abt (1985) gives a classification of F3 V, suggesting it is an F-type main-sequence star.[4] The measured angular diameter of the primary star is Template:Nowrap.[5] At the system's estimated distance this yields a size of about 2.2 times that of the Sun.[6] It is emitting about seven times solar luminosity from its outer atmosphere at an effective temperature of Template:Val.[7] This heat gives it the yellow-white-hued glow of an F-type star.[8]
In 2008, the companion star was resolved using adaptive optics at the Lick Observatory. Later observations showed the magnitude difference between the two stars is 3.65 ± 0.03 and they are separated by 0.669 arcsecond.[1] Abt (1985) lists the class as F5 V.[4]
References
External links
- ↑ 1.0 1.1 Cite error: Invalid
<ref>tag; no text was provided for refs namedapj698_1_28 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedaaa418_989 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedSIMBAD - ↑ 4.0 4.1 Cite error: Invalid
<ref>tag; no text was provided for refs namedFarrington2014 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedaaa431_773 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedlang2006 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedaaa405_723 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedcsiro