"사용자:Ta183ta/연습장"의 두 판 사이의 차이

잔글
In addition to the regular eclipses, the system shows smaller and slower variations in brightness. These are thought to be caused by changes in the accretion disc and are accompanied by variation in the profile and strength of spectral lines, particularly the emission lines. The variations are not regular but have been characterised with a period of 282 days.<ref name=carrier>{{cite journal|doi=10.1051/0004-6361:20020174 |title=Search for duplicity in periodic variable Be stars |journal=Astronomy and Astrophysics |volume=385 |issue=2 |pages=488 |year=2002 |last1=Carrier |first1=F. |last2=Burki |first2=G. |last3=Burnet |first3=M. |bibcode = 2002A&A...385..488C |doi-access=free }}</ref>
 
==Companions동반 천체==
In addition to Beta Lyrae A, several other companions have been catalogued. β Lyr B, at an angular separation of 45.7", is of spectral type B7V, has an apparent magnitude of +7.2, and can easily be seen with binoculars. It is about 80 times as luminous as the Sun. In 1962 it was identified as spectroscopic binary with a period of 4.348 days,<ref>{{cite journal|date=September 20, 1961|author1= Abt, Helmut A. | author2=Jeffers, Hamilton M. |author3=Gibson, James |author4=Sandage, Allan R.|title=The Visual Multiple System Containing Beta Lyrae|journal= The Astrophysical Journal |volume= 135 |pages= 429 |bibcode= 1962ApJ...135..429A|doi=10.1086/147282}}</ref> but the 2004 release of the SB9 catalog of Spectroscopic Binary Orbits omitted it, so it is now considered a single star.<ref name="SIMBADB" />
 
{| class="wikitable plainrowheaders sortable"
|-
! scope="col" style="width:30px;" rowspan=2 | Component구성원<ref>{{cite simbad|title=ADS 11745}}</ref>
! scope="col" style="width:70px;" rowspan=2 | Spectral Class분광형
! scope="col" style="width:110px;" rowspan=2 | Magnitude겉보기등급 (G)
! scope="col" style="width:330px;" colspan=2 | Proper Motion고유운동
! scope="col" style="width:150px;" rowspan=2 | Radial Velocity시선속도 (km/s)
! scope="col" style="width:150px;" rowspan=2 | Parallax연주시차 (mas)
! scope="col" style="width:50px;" rowspan=2 | Simbad
|-
! scope="col" style="width:150px;" |RA적경 (mas/yr)
! scope="col" style="width:180px;" |δ적위 (mas/yr)
|-
! scope="row" | A<ref>{{cite DR2|2090687795054381056}}</ref>
{{notelist}}
 
== See also각주 ==
* [[Stars and planetary systems in fiction#Sheliak (Beta Lyrae)|Beta Lyrae in fiction]]
 
==Notes==
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