Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...327..636m&link_type=abstract
Astronomy and Astrophysics, v.327, p.636-639
Astronomy and Astrophysics
Astrophysics
10
Stars: Chemically Peculiar, Stars: Early Type, Techniques: Photometric
Scientific paper
This is the first time that CCD-photometry in the three filter {DELTA}a system (Maitzen, 1976A&A....52..223M) was carried out after two decades of classical photoelectric photometry. The aim is to extend the successful search for chemically peculiar stars to more and distant open clusters as well as far galactic fields. In this paper we present CCD-photometry for a sample of 25 field stars with published spectroscopic peculiarity types. 22 of them show discordance between their Michigan catalogue types (non-peculiar) and the Bidelman & MacConnell (1973AJ.....78..678B; BC) peculiarity assignments. Eight stars are peculiar in {DELTA}a (five of them also in the Geneva index {DELTA}(V1-G)) thus supporting BC, mainly among their Silicon star discoveries. Considering cases where Silicon line enhancements were interpreted as peculiar instead as indicator of higher luminosity by BC, and the perfect detection of the three unambiguous peculiar stars, in addition to the achievement of an accuracy of 0.003mags, we are justified to conclude that the performance of our CCD-{DELTA}a photometry perfectly matches the requirements of the conventional photometric technique and thus opens the way to observations of fainter stars.
Maitzen Hans Michael
Paunzen E. E.
Rode M.
No associations
LandOfFree
First CCD measurements in the {DELTA}a system for detecting CP2 stars. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with First CCD measurements in the {DELTA}a system for detecting CP2 stars., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First CCD measurements in the {DELTA}a system for detecting CP2 stars. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1682488