CCD photometric search for peculiar stars in open clusters. I. NGC 2169, Melotte 105 and NGC 6250

Details CCD photometric search for peculiar stars in open clusters. I. NGC 2169, Melotte 105 and NGC 6250 CCD photometric search for peculiar stars in open clusters. I. NGC 2169, Melotte 105 and NGC 6250

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26as..147...99b&link_type=abstract

Astronomy and Astrophysics Supplement, v.147, p.99-109

Astronomy and Astrophysics

Astrophysics

12

Stars: Chemically Peculiar, Stars: Early-Type, Techniques: Photometric, Open Clusters And Associations: General

Scientific paper

The search for chemically peculiar (CP) stars in open clusters using photoelectric photometry sampling the presence of the characteristic flux depression feature at 5200 Å,via the Delta a-system (Maitzen \cite{M76}) has so far delivered data for objects usually no more distant than 1000 pc from the Sun. A series of fourteen papers (first: Maitzen & Hensberge \cite{M81}; for the time being last: Maitzen \cite{M93}) were devoted to 1240 stars in 38 open cluster fields. If one intends to study the presence of CP stars at larger distances from the Sun, classical photometry has to be replaced by CCD photometry. We have therefore initialized in 1995 a new survey in open clusters and the Large Magellanic Cloud using the CCD technology. As a first step, we have presented new Delta a-photometry of 22 CP2 stars in the galactic field to prove the capability of CCD photometry for our aim (Maitzen et al. \cite{M97}). In the first paper of a new series devoted to CCD photometry, we present data on NGC 2169 (13 stars investigated), Melotte 105 (114 stars), and NGC 6250 (48 stars). NGC 2169 was used to test our results with those of classical photometry which yields excellent agreement. For NGC 6250 we find two new definite CP2 (according to the definition by Preston \cite{P74}) stars (Delta a = 0.065 and 0.026 mag) and two lambda Bootis candidates. Twelve objects with only marginally peculiar Delta a-values for Melotte 105 were detected. Additional spectroscopic and photometric evidence is needed to substantiate their peculiarity. Based on observations at ESO-La Silla, UTSO-Las Campanas and L.~Figl Observatory, Mt. Schöpfl, Austria.

Affiliated with

Also associated with

No associations

Rating

CCD photometric search for peculiar stars in open clusters. I. NGC 2169, Melotte 105 and NGC 6250 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 CCD photometric search for peculiar stars in open clusters. I. NGC 2169, Melotte 105 and NGC 6250, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CCD photometric search for peculiar stars in open clusters. I. NGC 2169, Melotte 105 and NGC 6250 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1147323