Berkeley 93: A distant star cluster nestled in a dust cloud

Abstract

view Abstract Citations (13) References (9) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Berkeley 93: A Distant Star Cluster Nestled in a Dust Cloud Saurer, W. ; Seeberger, R. ; Weinberger, R. ; Ziener, R. Abstract While performing galactic and extragalactic studies near the galactic plane in Cepheus Charge Coupled Device (CCD) frames in B, V, and R were taken of the faint (V greater than or equal to 16m) previously unstudied open star cluster Berkeley 93 (Be 93). Our results indicate that this object is the core of a larger aggregate, is slightly evolved, strongly reddened (EB - V approximately equal to 1.5), and shows a pronounced variable reddening that is probably due to the location of the cluster inside (near the border) a dust cloud. By far the reddest, and obviously most evolved star is a (variable) carbon star that -- because of its reddening and location -- appears to be a cluster member. We present arguments in favor of a large distance of more than 5 kpc for Be 93 which possibly belongs to the galactic warp. As an addendum, we present six star concentrations discovered on the POSS or European Southern Observatory (ESO) SERC atlas that might represent hitherto uncatalogued open star clusters of 'Berkeley type'. Publication: The Astronomical Journal Pub Date: June 1994 DOI: 10.1086/117020 Bibcode: 1994AJ....107.2101S Keywords: Cosmic Dust; Open Clusters; Stellar Evolution; Stellar Spectrophotometry; Charge Coupled Devices; Interstellar Extinction; Astronomy; OPEN CLUSTERS AND ASSOCIATIONS: BERKELEY 93; ISM: CLOUDS full text sources ADS | data products SIMBAD (226) CDS (1)