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Absolute wavelength shifts - A new diagnostic for rapidly rotating stars

Dravins, Dainis LU (2004) Stellar rotation p.27-32
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Stellar Rotation; IAU Symposium
editor
Maeder, A.; Eenens, P.; and
issue
215
pages
27 - 32
publisher
Astronomical Society of the Pacific
conference name
Stellar rotation
conference location
Cancun, Mexico
conference dates
2002-11-11 - 2002-11-15
external identifiers
  • wos:000226161500007
ISSN
0074-1809
language
English
LU publication?
yes
id
a3cfccc7-5291-4c3d-9546-813051fee3c3 (old id 255030)
date added to LUP
2007-12-10 11:40:29
date last changed
2018-11-21 20:39:59
@inproceedings{a3cfccc7-5291-4c3d-9546-813051fee3c3,
  abstract     = {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.},
  author       = {Dravins, Dainis},
  editor       = {Maeder, A. and Eenens, P.},
  issn         = {0074-1809},
  language     = {eng},
  location     = {Cancun, Mexico},
  number       = {215},
  pages        = {27--32},
  publisher    = {Astronomical Society of the Pacific},
  title        = {Absolute wavelength shifts - A new diagnostic for rapidly rotating stars},
  year         = {2004},
}