시작하기     To Survive in the Universe    
Inhabited Sky
    News@Sky     천체사진     컬렉션     포럼     Blog New!     질문및답변     출판     로그인  

HD 210822


내용

사진

사진 업로드

DSS Images   Other Images


관련 글

Rotation Velocities of Red and Blue Field Horizontal-Branch Stars
We present measurements of the projected stellar rotation velocities(vsini) of a sample of 45 candidate field horizontal-branch (HB) starsspanning a wide range of effective temperatures, from red HB stars withTeff~=5000K to blue HB stars with Teff of 17,000K.Among the cooler blue HB stars (Teff=7500-11500 K), weconfirm prior studies showing that, although a majority of stars rotateat vsini<15kms-1, there exists a subset of ``fastrotators'' with vsini as high as 30-35 km s-1. All but one ofthe red HB stars in our sample have vsini<10kms-1, and noanalogous rotation bimodality is evident. We also identify anarrow-lined hot star (Teff~=16,000K) with enhancedphotospheric metal abundances and helium depletion, similar to theabundance patterns found among hot BHB stars in globular clusters, andfour other stars that may also belong in this category. We discussdetails of the spectral line fitting procedure that we use to deducevsini and explore how measurements of field HB star rotation may shedlight on the issue of HB star rotation in globular clusters.

The Fundamental Parameters of Field Horizontal-Branch Stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....112.2291G&db_key=AST

Spectral Characteristics of Field Horizontal-Branch Stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1996AJ....112.2286C&db_key=AST

Finding charts for field horizontal-branch A-type stars.
Not Available

Possible Horizontal-Branch Stars at High Galactic Latitudes. II
Not Available

Vitesse radiales dans 4 Selected Areas.
Not Available

새 글 등록


관련 링크

  • - 링크가 없습니다. -
새 링크 등록


다음 그룹에 속해있음:


관측 및 측정 데이터

별자리:페가수스자리
적경:22h12m47.68s
적위:+15°00'31.8"
가시등급:8.18
거리:246.305 파섹
적경상의 고유운동:37.8
적위상의 고유운동:10.4
B-T magnitude:8.405
V-T magnitude:8.199

천체목록:
일반명   (Edit)
HD 1989HD 210822
TYCHO-2 2000TYC 1681-1506-1
USNO-A2.0USNO-A2 1050-20153745
HIPHIP 109653

→ VizieR에서 더 많은 목록을 가져옵니다.