Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Ergebnis 16 von 44
Monthly notices of the Royal Astronomical Society, 1969-04, Vol.143 (4), p.319-339
1969
Volltextzugriff (PDF)

Details

Autor(en) / Beteiligte
Titel
Some Effects of the Instrumental Profile in Stellar Spectrophotometry, with Particular Reference to the Arcturus Atlas
Ist Teil von
  • Monthly notices of the Royal Astronomical Society, 1969-04, Vol.143 (4), p.319-339
Ort / Verlag
Oxford, UK: Oxford University Press
Erscheinungsjahr
1969
Quelle
Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
Beschreibungen/Notizen
  • A method is described of refining an instrumental profile (initially derived from emission-line observations) of a high-resolution stellar spectrograph, by using profiles of the telluric oxygen bands obtained with a solar spectrometer of still higher resolution. Owing to the light thrown into the wings of the instrumental profile, the observed profiles of absorption lines in late-type stellar spectra are substantially shallower (by ~ 10 per cent of their central depressions) than the true profiles. It is not true that accurate photometry with a high-resolution spectrograph will result in a close resemblance between the spectrum being observed and the observations being made of it. It is not true that the resemblance can be appreciably improved by any increase in resolving power. Even with accurate photometry, the equivalent widths measured with the spectrograph here discussed must be 5–10 per cent less than the true values. Other fundamentally similar spectrographs are unlikely to be much better and may easily be much worse. Important improvements in the observational accuracy of stellar line profiles only seem possible by the use of double-pass spectrometers, which unfortunately have low luminous efficiency.
Sprache
Englisch
Identifikatoren
ISSN: 0035-8711
eISSN: 1365-2966
DOI: 10.1093/mnras/143.4.319
Titel-ID: cdi_crossref_primary_10_1093_mnras_143_4_319
Format

Weiterführende Literatur

Empfehlungen zum selben Thema automatisch vorgeschlagen von bX