Home     To Survive in the Universe    
Services
    Why to Inhabit     Top Contributors     Astro Photo     The Collection     Forum     Blog New!     FAQ     Login  
→ Adopt this star  

HD 7283


Contents

Images

Upload your image

DSS Images   Other Images


Related articles

The rotation of AP stars
Photometric periods of silicon stars belonging to clusters andassociations as well as to the field are discussed in relation withtheories of magnetic braking taking place on the main sequence. It isshown that Si stars do not lose the bulk of their angular momentumduring their main-sequence lifetime, but must have lost it before. Anybraking mechanism which predicts an e-folding time of the order of, orshorter than, the star's lifetime seems ruled out. The theory of purelyhydromagnetic rotational braking is much too efficient to fit theobservations (unless under its earlier form proposed by Kulsrud, 1971),while the accretion theory does not fit them either, although it seemsmore realistic. Preinjection of cosmic rays by means of Ap stars appearsdoubtful.

Submit a new article


Related links

  • - No Links Found -
Submit a new link


Member of following groups:


Observation and Astrometry data

Constellation:ほうおう座
Right ascension:01h12m09.28s
Declination:-54°05'41.9"
Apparent magnitude:8.714
Distance:552.486 parsecs
Proper motion RA:8
Proper motion Dec:9.6
B-T magnitude:10.251
V-T magnitude:8.841

Catalogs and designations:
Proper Names
HD 1989HD 7283
TYCHO-2 2000TYC 8474-494-1
USNO-A2.0USNO-A2 0300-00358643
HIPHIP 5622

→ Request more catalogs and designations from VizieR