A photometric investigation of cluster membership for the Cepheid BB Sagittarii

Details A photometric investigation of cluster membership for the Cepheid BB Sagittarii A photometric investigation of cluster membership for the Cepheid BB Sagittarii

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1231t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, July 1985, p. 1231-1237. Research supported by the Universidad de Chile and NSER

Astronomy and Astrophysics

Astronomy

11

Astronomical Photometry, Electrophotometry, Star Clusters, Open Clusters, Radii, Stellar Color, Ubv Spectra

Scientific paper

Photoelectric photometry (UBV and some VRI) is presented for the close pair of open clusters Cr 394 and NGC 6716 and for the 6d.64 classical Cepheid BB Sgr. The spatial location and inferred age for BB Sgr are consistent with coronal membership in Cr 394, whose center is located only 19.6 arcmin (3.6 pc) from the Cepheid. Its intrinsic luminosity and mean light color index as a cluster member are >MV< = -3.08±0.12 and (-)0 = 0.75±0.02, respectively, values which are consistent with a location near the red edge of the Cepheid instability strip.