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Absolute wavelength shifts - A new diagnostic for rapidly rotating stars

In English

Författare

Redaktör

  • A. Maeder
  • P. Eenens

Summary, in English

Accuracies reached in space astrometry now permit. the accurate determination of astrometric radial velocities. without any use of spectroscopy. Knowing this true stellar motion, spectral shifts; intrinsic to stellar atmospheres can be identified, for instance gravitational redshifts and those caused by, velocity fields on stellar surfaces. The astrometric accuracy is independent. of any spectral complexity, such as the smeared-out line profiles of rapidly rotating stars. Besides a better determination of stellar velocities, this permits more precise studies of atmospheric dynamics, such as possible modifications of stellar surface convection (granulation) by rotation-induced forces, as well as a potential for observing meridional flows across stellar surfaces.

Publiceringsår

2004

Språk

Engelska

Sidor

27-32

Publikation/Tidskrift/Serie

Stellar Rotation; IAU Symposium

Issue

215

Dokumenttyp

Konferensbidrag

Förlag

Astronomical Society of the Pacific (ASP)

Ämne

  • Astronomy, Astrophysics and Cosmology

Conference name

Stellar rotation

Conference date

2002-11-11 - 2002-11-15

Conference place

Cancun, Mexico

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0074-1809