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{{short description|Astronomical formula for the mass of a stellar system}} ...ons and [[proper motions]] of its component [[star]]s. The distance to the stellar system must also be known. ...

...itle= Stellar Structure |series= Stars and Stellar Systems: Compendium of Astronomy and Astrophysics |volume=VIII|editor1-first=Lawrence Hugh |editor1-last= *{{citation|first=B.|last=Strömgren|title=The opacity of stellar matter and the hydrogen content of the stars|journal=Zeitschrift für Astrop ...

...r|cluster]] to be 910 [[parsec]]s from the [[Sun]], its mean [[Extinction (astronomy)|visual extinction]] <math>E(B-V) = 0.27</math> and its age to range from < ...onomy)|photometry]] data for 122 stars, revising the cluster [[Extinction (astronomy)|reddening]] to be <math>E(B-V) = 0.03</math>.<ref name="CarraroPatat" /> ...

...visual magnitude]] of 4.98.<ref name=Anderson2012/> Based upon an annual [[stellar parallax|parallax shift]] of {{Val|2.9564|ul=mas}},<ref name=GaiaDR2/> it i ...pe]] [[giant star]] with an overabundance of [[Cyano radical|CN]] in the [[stellar atmosphere|atmosphere]]. The measured [[angular diameter]] of this star, af ...

...ck hole, ''σ'' is the stellar [[velocity dispersion]] of the host [[Bulge (astronomy)|bulge]], and ''G'' is the [[gravitational constant]]. ...ate= 2010|title=Testing properties of the Galactic center black hole using stellar orbits |journal=Physical Review D |volume=81 |issue=6 |pages=062002 | doi=1 ...

...=Takeda2008/> The distance to this star can be estimated from its annual [[stellar parallax|parallax shift]] of {{Val|7.9700|0.0674}},<ref name="Gaia EDR3"/> ...ontal branch]] and is generating energy through [[helium fusion]] in its [[stellar core|core region]].<ref name=Valentini2010/> The [[interferometry]]-measure ...

...e=Anderson2012/> The distance to HD 89998, as determined from its annual [[stellar parallax|parallax shift]] of {{Val|15.9|ul=mas}},<ref name=GaiaDR2/> is 205 This is an [[stellar evolution|evolved]] [[giant star]] with a [[stellar classification]] of K1&nbsp;III.<ref name=houk1978/> The measured [[angular ...

...iple of maximum entropy|maximum entropy]] image reconstruction to find the stellar image. This technique gives the smoothest and simplest image that is consis ...ary star]] HR 1099 (V711 Tau); from this they could derive an image of the stellar surface. ...

...=https://ned.ipac.caltech.edu/level5/March09/Edgar/Edgar2.html|journal=New Astronomy Reviews|access-date=19 February 2018|language=en|doi=10.1016/j.newar.2004.0 [[Category:Equations of astronomy]] ...

...Soubiran2010/> The distance to this system, as determined from an annual [[stellar parallax|parallax shift]] of {{Val|19.9|ul=mas}},<ref name=GaiaDR2/> is 164 ...ontal branch]] and is generating energy through [[helium fusion]] at its [[stellar core|core]].<ref name=Alves2000/> The [[interferometry]]-measured [[angular ...

...mass consists of stars that have evolved into [[white dwarf]]s or other [[stellar remnant]]s. The remainder of lost mass consists of stars that have migrated ...city]] variations suggesting the presence of a planetary companion, though stellar activity cannot be completely ruled out.<ref name="Leão2018"/><ref name="De ...

...ugh to be visible to the naked eye on a dark night. Based upon an annual [[stellar parallax|parallax shift]] of 0.00642&nbsp;[[arc second]]s,<ref name=vanLeeu ...Sun's mass]], and radiates 1,175 times the [[solar luminosity]] from its [[stellar atmosphere|outer atmosphere]] at an [[effective temperature]] of 14,700&nbs ...

The '''Baldwin effect''' in astronomy describes a relationship between continuum and emission-line fluxes observe {{cite journal | title =Luminosity Indicators in the Spectra of Quasi-Stellar Objects | journal = Astrophysical Journal | volume = 214 | pages = 679–684 ...

In [[astronomy]], the '''Kennicutt–Schmidt law''' is an empirical relation between the su ...ormation in the Milky Way and Nearby Gaalxies | journal = Annual Review of Astronomy & Astrophysics | volume = 50 | pages = 531–585 | doi = 10.1146/annurev-astr ...

...a clear, dark night. The distance to this star, as determined using the [[stellar parallax|parallax method]],<ref name=vanLeeuwen2007/> is around 127&nbsp;[[ ...ass|Sun's mass]] and radiates 24 times the [[solar luminosity]] from its [[stellar atmosphere|outer atmosphere]] at an [[effective temperature]] of 4,941&nbsp ...

...derson2012/> and hence is visible to the naked eye. Based upon an annual [[stellar parallax|parallax shift]] of {{Val|15.8|ul=mas}},<ref name=GaiaDR2/> it is ...stellar evolution|evolved]] [[G-type star|G-type]] [[giant star]] with a [[stellar classification]] of G6&nbsp;III.<ref name=perkins1989/> The [[interferometr ...

...khstan.<ref>[[Jaan Einasto|J. Einasto]] (1965), Kinematics and dynamics of stellar systems, ''Trudy Inst. Astrofiz. Alma-Ata'' '''5''', 87</ref> ...logarithmic slope]. A comprehensive paper that derives many properties of stellar systems obeying Einasto's law. ...

...stance, the visual magnitude of the star is diminished by an [[Extinction (astronomy)|interstellar absorption factor]] of 0.033 due to interstellar dust.<ref na ...a thousand times the [[solar luminosity|luminosity of the Sun]] from its [[stellar atmosphere|outer atmosphere]] at an [[effective temperature]] of 3,900&nbsp ...

...stance, the visual magnitude of the star is diminished by an [[extinction (astronomy)|extinction factor]] of 0.06<ref name=Groenewegen2012/> due to [[interstell ...d 560<ref name=Groenewegen2012/> times the [[solar luminosity]] from its [[stellar atmosphere|outer atmosphere]] at an [[effective temperature]] of 3,940&nbsp ...

...-6361:20078357 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | last1 ...arxiv=1108.4971 | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | last1=Anderson | fi ...