134.139.29.189 at 18:15, 28 October 2013

2013-10-28T18:15:39Z

← Older revision		Revision as of 20:15, 28 October 2013
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	The ~~author~~ is ~~referred~~ to ~~as Donovan~~. ~~Camping~~ is ~~what he does each week~~. ~~For yrs he~~ is ~~been dwelling in Alaska but his spouse wants them to shift~~. ~~Employing has been his day occupation for~~ a ~~whilst~~. ~~If you want~~ to ~~discover uot more verify out his~~ web ~~site~~: http://~~www~~.~~fundacioportal~~.~~org~~/~~botasugg~~/~~botas~~-~~ugg-05287872~~.~~htm~~<br><br>~~Feel free to surf to my website~~ ... [http://~~www~~.~~fundacioportal~~.~~org~~/~~botasugg~~/~~botas~~-~~ugg~~-~~05287872.htm Botas Ugg~~]		{{Starbox begin
			\| name=Beta Pyxidis
			}}
			{{Starbox image
			\| image =
			<div style="position: relative">[[File:Pyxis IAU.svg\|250px\|alt=Diagram showing star positions and boundaries of the Pyxis constellation and its surroundings]]
			<div style="position: absolute; left: 137px; top: 145px">[[File:Cercle rouge 100%.svg\|12px]]</div>
			</div>
			\| caption=Location of β Pyxidis (circled)
			}}
			{{Starbox observe
			\| epoch = J2000
			\| ra = {{RA\|08\|40\|06.14363}}<ref name=aaa474_2_653/>
			\| dec = {{DEC\|–35\|18\|30.0}}<ref name=aaa474_2_653/>
			\| appmag_v = 3.954<ref name="gutierrez"/>
			\| constell = [[Pyxis]]
			}}
			{{Starbox character
			\| class = G7Ib-II<ref name="SIMBAD"/>
			\| b-v = +0.935<ref name="gutierrez"/>
			\| u-b = +0.646<ref name="gutierrez"/>
			\| variable =
			}}
			{{Starbox astrometry
			\| radial_v = –13.4<ref name=rgcrv/>
			\| prop_mo_ra = +9.84<ref name=aaa474_2_653/>
			\| prop_mo_dec = –20.80<ref name=aaa474_2_653/>
			\| parallax = 7.84
			\| p_error = 0.19
			\| parallax_footnote = <ref name=aaa474_2_653/>
			\| absmag_v = –0.78<ref name="apj107"/>
			}}
			{{Starbox detail
			\| age =
			\| metal_fe =
			\| mass =
			\| radius = 28<ref name=lang2006/>
			\| rotational_velocity =
			\| luminosity =
			\| temperature = 5,400<ref name=apj507_2_919/>
			\| gravity =
			}}
			{{Starbox catalog
			\| names=β Pyxidis, β Pyx, Beta Pyx, [[Durchmusterung\|CPD]]−34  2846, [[Fifth Fundamental Catalogue\|FK5]] 2681, [[Henry Draper catalogue\|HD]] 74006, [[Hipparcos catalogue\|HIP]] 42515, [[Bright Star Catalogue\|HR]] 3438, [[Smithsonian Astrophysical Observatory\|SAO]] 199490, [[Washington Double Star Catalog\|WDS]] J08401-3518A<ref name="SIMBAD"/>
			}}
			{{Starbox end}}

			'''Beta Pyxidis''' ('''Beta Pyx''', '''β Pyxidis''', '''β Pyx''') is a [[double star]]<ref name="SIMBAD"/> located in the southern [[constellation]] [[Pyxis]]. It has an [[apparent visual magnitude]] of 3.954, making it the [[List of stars in Pyxis\|second brightest star]] in this faint constellation.

			Based upon [[parallax]] measurements, this star is an estimated 420 [[light-year]]s (128 [[parsec]]s) from the [[Earth]].<ref name=aaa474_2_653/> The [[spectrum]] matches a [[bright giant]] or [[supergiant]] star of [[stellar classification]] G7Ib-II. The [[interferometer]]-measured [[angular diameter]] of this star is {{nowrap\|2.05 ± 0.14 [[milliarcsecond\|mas]]}}.<ref name=aaa431_773/> At its estimated distance, this yields a physical size of about 28 times the [[Solar radius\|radius of the Sun]].<ref name=lang2006/> The [[effective temperature]] of the star's outer envelope is about 5,400 K, giving it the characteristic yellow hue of a [[G-type star]].<ref name=apj507_2_919/><ref name=csiro/>

			In 2010, this star was among a survey of massive, lower [[effective temperature]] supergiants in an attempt to detect a magnetic field. This star may have a longitudinal [[stellar magnetic field\|magnetic field]] with a strength of less than a [[Gauss (unit)\|Gauss]].<ref name=mnras408_4_2290/> It is a [[Metallicity\|young disk star]] system with [[Space velocity (astronomy)\|space velocity]] components, {{nowrap\|[U, V, W]}} = {{nowrap\|[–11.0, +11.8, –2.2] km/s}}.<ref name="apj107"/> There is a magnitude 12.5 optical companion, located at an angular separation of 12.7 [[arcsecond]]s and a [[position angle]] of 118° as of the year 1943.<ref name=wdsc84/>

			==Naming==
			In [[Chinese language\|Chinese]], {{lang\|zh\|天狗}} ({{lang\|zh-Latn\|Tiān Gǒu}}), meaning ''[[Ghost (Chinese constellation)\|Celestial Dog]]'', refers to an asterism consisting of β Pyxidis, [[e Velorum]], [[f Velorum]], [[Alpha Pyxidis\|α Pyxidis]], [[Gamma Pyxidis\|γ Pyxidis]] and [[Delta Pyxidis\|δ Pyxidis]]. Consequently, β Pyxidis itself is known as {{lang\|zh\|天狗四}} ({{lang\|zh-Latn\|Tiān Gǒu sì}}, {{lang-en\|the Fourth Star of Celestial Dog}}.)<ref>{{zh icon}} [http://aeea.nmns.edu.tw/2006/0607/ap060717.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 17 日]</ref>

			==References==
			{{reflist\|30em\|refs=

			<ref name=aaa474_2_653>{{cite journal \| first=F. \| last=van Leeuwen \|date=November 2007 \| title=Validation of the new Hipparcos reduction \| journal=Astronomy and Astrophysics \| volume=474 \| issue=2 \| pages=653–664 \| bibcode=2007A&A...474..653V \| doi=10.1051/0004-6361:20078357 \|arxiv = 0708.1752 }}</ref>

			<ref name="SIMBAD">{{cite web \| title=bet Pyx -- Star in double system \| work=SIMBAD \| publisher=Centre de Données astronomiques de Strasbourg \| url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Beta+Pyx \| accessdate=2009-04-15 }}</ref>

			<ref name="gutierrez">{{cite journal \| display-authors=1 \| last1=Gutierrez-Moreno \| first1=Adelina \| last2=Moreno \| first2=H. \| last3=Stock \| first3=J. \| last4=Torres \| first4=C. \| last5=Wroblewski \| first5=H. \| title=A System of photometric standards \| publisher=Publicaciones Universidad de Chile, Department de Astronomy \| volume=1 \| pages=1–17 \| year=1966 \| bibcode=1966PDAUC...1....1G }}</ref>

			<ref name=rgcrv>{{cite conference \| first=D. S. \| last=Evans \| title=The Revision of the General Catalogue of Radial Velocities \| booktitle=Proceedings from IAU Symposium no. 30, Determination of Radial Velocities and their Applications \| publisher=Dordrecht, D. Reidel Publishing Co. \| date=June 20-24, 1966 \| location=University of Toronto \| bibcode=1967IAUS...30...57E }}</ref>

			<ref name="apj107">{{cite journal \| last=Eggen \| first=O. J. \| year=1994 \| title=Photometry of F-K type bright giants and supergiants. 3: The luminosity, reddening, and heavy element abundance of GK stars \| journal=The Astrophysical Journal \| volume=107 \| issue=6 \| pages=2184–2210 \| bibcode=1994AJ....107.2184E \| doi = 10.1086/117030 }} – see p. 2205.</ref>

			<ref name=wdsc84>{{citation \| last1=Worley \| first1=C. E. \| last2=Douglas \| first2=G. G. \| title=The Washington double star catalogue (WDS, 1996.0) \| journal=Astronomy & Astrophysics Supplement Series \| volume=125 \|date=November 1997 \| page=523 \|bibcode = 1997A&AS..125..523W \|doi = 10.1051/aas:1997239 }}</ref>

			<ref name=mnras408_4_2290>{{citation \| display-authors=1 \| last1=Grunhut \| first1=J. H. \| last2=Wade \| first2=G. A. \| last3=Hanes \| first3=D. A. \| last4=Alecian \| first4=E. \| title=Systematic detection of magnetic fields in massive, late-type supergiants \| journal=Monthly Notices of the Royal Astronomical Society \| volume=408 \| issue=4 \| pages=2290–2297 \|date=November 2010 \| doi=10.1111/j.1365-2966.2010.17275.x \| bibcode=2010MNRAS.408.2290G \|arxiv = 1006.5891 }}</ref>

			<ref name=aaa431_773>{{citation \| last1=Richichi \| pages=A. \| last2=Percheron \| first2=I. \| last3=Khristoforova \| first3=M. \| title=CHARM2: An updated Catalog of High Angular Resolution Measurements \| journal=Astronomy and Astrophysics \| volume=431 \| pages=773–777 \|date=February 2005 \| doi=10.1051/0004-6361:20042039 \| bibcode=2005A&A...431..773R }}</ref>

			<ref name=lang2006>{{citation \| first1=Kenneth R. \| last1=Lang \| title=Astrophysical formulae \| volume=1 \| series=Astronomy and astrophysics library \| edition=3 \| publisher=Birkhäuser \| year=2006 \| isbn=3-540-29692-1 \| url=http://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R<sub>*</sub>) is given by:
			:<math>\begin{align} 2\cdot R_*
			& = \frac{(10^{-3}\cdot 128\cdot 2.05)\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
			& \approx 56\cdot R_{\bigodot}
			\end{align}</math></ref>

			<ref name=apj507_2_919>{{citation \| last1=O'Neal \| first1=Douglas \| last2=Neff \| first2=James E. \| last3=Saar \| first3=Steven H. \| title=Measurements of Starspot Parameters on Active Stars using Molecular Bands in Echelle Spectra \| journal=The Astrophysical Journal \| volume=507 \| issue=2 \| pages=919–937 \|date=November 1998 \| doi=10.1086/306340 \| bibcode=1998ApJ...507..919O }}</ref>

			<ref name=csiro>{{citation \| title=The Colour of Stars \| date=December 21, 2004 \| work=Australia Telescope, Outreach and Education \| publisher=Commonwealth Scientific and Industrial Research Organisation \| url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html \| accessdate=2012-01-16 }}</ref>

			}}

			{{Stars of Pyxis}}
			[[Category:Bayer objects\|Pyxidis, Beta]]
			[[Category:G-type giants]]
			[[Category:Pyxis (constellation)]]

en>RockMagnetist: /* See also */ created and added link

2012-07-24T22:19:58Z

Introduction to angular momentum - Revision history

134.139.29.189 at 18:15, 28 October 2013

en>RockMagnetist: /* See also */ created and added link