Ogled vira Omega Andromede

{{Starbox begin
 | name        = Omega Andromede
}}
{{Starbox image
 | image = 
     <div style="position: relative">[[File:Andromeda IAU.svg|250px|alt=Diagram, ki kaže položaje zvezd in meje ozvezdja Andromede in sosed]]
     <div style="position: absolute; left: 34.3%; top: 32.6%;">[[File:Cercle rouge 100%.svg|12px]]</div>
     </div>
 | caption = Položaj ω Andromede (obkrožen)
}}
{{Starbox observe
 | epoch       = J2000
 | ra          = {{RA|01|27|39,38177}}<ref name=aaa474_2_653/>
 | dec         = {{DEC|+45|24|24,0727}}<ref name=aaa474_2_653/>
 | appmag_v    = +4,83<ref name=aaa418_989/><ref name=clpl4_99/>
 | constell    = [[Andromeda (ozvezdje)|Andromeda]]
}}
{{Starbox character
 | class       = F5&nbsp;IVe<ref name=SIMBAD/> or {{nowrap|F3 V + F5 V}}<ref name=Farrington2014/>
 | b-v         = +0,42<ref name=clpl4_99/>
 | u-b         = +0,00<ref name=clpl4_99/>
 | variable    = 
}}
{{Starbox astrometry
 | radial_v    = +14,7<ref name=aaa418_989/>
 | prop_mo_ra  = +356,99<ref name=aaa474_2_653/>
 | prop_mo_dec = –109,40<ref name=aaa474_2_653/>
 | parallax    = 34,94
 | p_error     = 0,31
 | parallax_footnote = <ref name=aaa474_2_653/>
 | absmag_v    = +2,57<ref name=aaa418_989/>
}}
{{Starbox detail
 | component1  = ω And A
 | mass        = {{Val|0,963|0,049}}<ref name=Farrington2014/>
 | radius      = 2,2<ref name=lang2006/>
 | luminosity  = 7,1<ref name=aaa405_723/>
 | temperature = 6.628<ref name=aaa405_723/>
 | metal_fe    = –0,16<ref name=aaa418_989/>
 | rotational_velocity = 57,1<ref name=aaa493_3_1099/>
 | age_gyr     = 2,1<ref name=aaa418_989/>
 | component2  = ω And B
 | mass2       = {{Val|0,860|0,051}}<ref name=Farrington2014/>
}}
{{Starbox catalog
 | names= 48&nbsp;Andromede, [[Star catalogue#BD.2FCD.2FCPD|BD]]+44°307, [[FK5]]&nbsp;1040, [[Henry Draper Catalogue|HD]]&nbsp;8799, [[Hipparcos catalogue|HIP]]&nbsp;6813, [[Star catalogue#BS, BSC, HR|HR]]&nbsp;417, [[Star catalogue#SAO|SAO]]&nbsp;37228.<ref name=SIMBAD/>
}}
{{Starbox reference
 | Simbad=HD+8799
}}
{{Starbox end}}
'''Omega Andromede''' (ω And, ω Andromede) je [[Bayerjevo poimenovanje]] za počasi se vrtečo [[Binarna zvezda|binarno zvezdo]]<ref name=apj698_1_28/> v severnem [[Ozvezdje|ozvezdju]] [[Andromeda (ozvezdje)|Andromede]]. [[Paralaksa]], ki je bila izmerjena med misijo [[Hipparcos]], je ta sistem umestila na okoli 933 [[Svetlobno leto|svetlobnih let]] (286 [[Parsek|parsekov]]) oddaljenosti od [[Zemlja|Zemlje]]. Njena [[Navidezni sij|navidezna magnituda]] je +4,83,<ref name=aaa418_989/> kar pomeni, da je dovolj svetla za opazovanje s prostim očesom.

Primarna komponenta ima [[Spektralna razvrstitev zvezd|zvezdno klasifikacijo]] F5&nbsp;IVe.<ref name=SIMBAD/> [[Spektralna razvrstitev zvezd|Izsevni razred]] IV nakazuje, da je to najverjetneje zvezda [[podorjakinja]]. A Abt (1985) je podal klasifikacijo F3&nbsp;V, kar nakazuje na to, da je to [[zvezda glavne veje tipa F]].<ref name=Farrington2014/> Izmerjeni [[Kotna velikost|kotni premer]] primarne zvezde je {{Brez preloma|0,70 ± 0,03 [[mili kotna sekunda|mas]]}}.<ref name=aaa431_773/> Na podlagi previdevane razdalje sistema je torej zvezda velika okoli 2,2 krat [[Sončev polmer|Sonca]].<ref name=lang2006/> Seva okoli sedem sončevih svetilnosti iz svoje [[Zvezdna atmosfera|zunanje atmosfere]] na [[Površinska temperatura|površinski temperaturi]] 6.628&nbsp;K.<ref name=aaa405_723/> Ta vročina da zvezdi rumeno-bel sij zvezde [[Spektralna razvrstitev zvezd|tipa F]].<ref name=csiro/>

Leta 2008 je bila z uporabo [[Adaptivna optika|adaptivne optike]] na [[Observatorij Lick|observatoriju Lick]] razločena še sekundarna zvezda. Kasnejša opazovanja so podala razliko magnitud med zvezdama 3,65 ± 0,03 in da sta ločeni 0,669 [[Kotna minuta in sekunda|kotnih sekund]].<ref name=apj698_1_28/> Abt (1985) označi zvezdo kot F5&nbsp;V.<ref name=Farrington2014/>

== Viri ==
{{Sklici|refs=<ref name=aaa474_2_653>{{citation | 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 | postscript=. |arxiv = 0708.1752 }}</ref>

<ref name=Farrington2014>{{citation
 | title=Separated Fringe Packet Observations with the CHARA Array. II. ω Andromeda, HD 178911, and ξ Cephei
 | last1=Farrington | first1=C. D. | last2=ten Brummelaar | first2=T. A.
 | last3=Mason | first3=B. D. | last4=Hartkopf | first4=W. I.
 | last5=Mourard | first5=D. | last6=Moravveji | first6=E.
 | last7=McAlister | first7=H. A. | last8=Turner | first8=N. H.
 | last9=Sturmann | first9=L. | last10=Sturmann | first10=J.
 | journal=The Astronomical Journal | display-authors=1
 | volume=148 | issue=3 | id=48 | pages=8 | date=September 2014
 | doi=10.1088/0004-6256/148/3/48 | bibcode=2014AJ....148...48F
 | arxiv=1407.0639 | postscript=. }}</ref>

<ref name=aaa418_989>{{citation | title=The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs | display-authors=1 | last1=Nordström | first1=B. | last2=Mayor | first2=M. | last3=Andersen | first3=J. | last4=Holmberg | first4=J. | last5=Pont | first5=F. | last6=Jørgensen | first6=B. R. | last7=Olsen | first7=E. H. | last8=Udry | first8=S. | last9=Mowlavi | first9=N. | journal=Astronomy and Astrophysics | volume=418 | pages=989–1019  |date=May 2004 | doi=10.1051/0004-6361:20035959 | bibcode=2004A&A...418..989N | arxiv=astro-ph/0405198 | postscript=. }}</ref>

<ref name=aaa493_3_1099>{{citation | last1=Schröder | first1=C. | last2=Reiners | first2=A. | last3=Schmitt | first3=J. H. M. M. | title=Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo | journal=Astronomy and Astrophysics | volume=493 | issue=3 | pages=1099–1107 | date=January 2009 | doi=10.1051/0004-6361:200810377 | bibcode=2009A&A...493.1099S | postscript=. | url=http://goedoc.uni-goettingen.de/goescholar/bitstream/handle/1/9690/aa10377-08.pdf?sequence=2 }}{{Slepa povezava|date=julij 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>

<ref name=clpl4_99>{{citation | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | date=1966 | bibcode=1966CoLPL...4...99J | postscript=. }}</ref>

<ref name=SIMBAD>{{cite simbad | title=ome And | access-date=2012-06-26 | postscript=. }}</ref>

<ref name=apj698_1_28>{{citation | last1=Gladysz | first1=Szymon | last2=Christou | first2=Julian C. | title=Reference-Less Detection, Astrometry, and Photometry of Faint Companions with Adaptive Optics | journal=The Astrophysical Journal | volume=698 | issue=1 | pages=28–42 |date=June 2009 | doi=10.1088/0004-637X/698/1/28 | bibcode=2009ApJ...698...28G | postscript=. |arxiv = 0805.1870 }}</ref>

<ref name=aaa405_723>{{citation | display-authors=1 | last1=do Nascimento | first1=J. D. Jr. | last2=Canto Martins | first2=B. L. | last3=Melo | first3=C. H. F. | last4=Porto de Mello | first4=G. | last5=De Medeiros | first5=J. R. | title=On the link between rotation, chromospheric activity and Li abundance in subgiant stars | journal=Astronomy and Astrophysics | volume=405 | pages=723–731 |date=July 2003 | doi=10.1051/0004-6361:20030633 | bibcode=2003A&A...405..723D | arxiv=astro-ph/0307196 | postscript=. }}</ref>

<ref name=aaa431_773>{{citation | last1=Richichi | first1=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]] | date=2006 | isbn=3-540-29692-1 | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R<sub>*</sub>) is given by:
:<math>\begin{align} 2\cdot R_*
 & = \frac{(28.6\cdot 0.70\cdot 10^{-3})\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
 & \approx 4.31\cdot R_{\bigodot}
\end{align}</math></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 | postscript=. | archive-date=2013-12-03 | archive-url=https://web.archive.org/web/20131203222826/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | url-status=mrtva | datum-arhiva=2013-12-03 | url-arhiva=https://web.archive.org/web/20131203222826/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html }}</ref>}}

== Zunanje povezave ==

* [http://aladin.u-strasbg.fr/AladinPreview?-c=NLTT++4832&ident=NLTT++4832&submit=Aladin+previewer Slika ω Andromede]

{{Andromeda (ozvezdje)}}
[[Kategorija:Telesa Bonnskega pregleda]]
[[Kategorija:Telesa v Katalogu svetlih zvezd]]
[[Kategorija:Telesa v Katalogu Hipparcos]]
[[Kategorija:Podorjakinje tipa F]]
[[Kategorija:Andromeda (ozvezdje)]]
[[Kategorija:Telesa v Flamsteedovem katalogu]]
[[Kategorija:Telesa v Bayerjevem katalogu]]
[[Kategorija:Telesa v Katalogu Henry Draper]]