SIMBAD references

2001AJ....122..248K - Astron. J., 122, 248-256 (2001/July-0)

UBVI and Hα photometry of the h and χ Persei cluster.

KELLER S.C., GREBEL E.K., MILLER G.J. and YOSS K.M.

Abstract (from CDS):

UBVI and Hα photometry is presented for 17319 stars in vicinity of the young double cluster h and χ Persei. Our photometry extends over a 37'x1° field centered on the association. We construct reddening contours within the imaged field. We find that the two clusters share a common distance modulus of 11.75±0.05 and ages of logage(yr)=7.1±0.1. From the V-Hα color, a measure of the Hα emission strength, we conduct a survey for emission line objects within the association. We detect a sample of 33 Be stars, eight of which are new detections. We present a scenario of evolutionary enhancement of the Be phenomenon to account for the peak in Be fraction toward the top of the main sequence in the population of h and χ Persei and similar young clusters.

Abstract Copyright:

Journal keyword(s): Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 869 - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 884 - Stars: Emission-Line, Be - Stars: Evolution - Techniques: Photometric

VizieR on-line data: <Available at CDS (J/AJ/122/248): table1.dat table2.dat table4.dat>

Nomenclature: Table 2: [KGM2001] NNNNN (Nos 1-17319).

Simbad objects: 1746

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