The VELA star cloud. II - Early-type stars and long-period Cepheids near the VELA pulsar
1982; Institute of Physics; Volume: 50; Linguagem: Inglês
10.1086/190825
ISSN1538-4365
Autores Tópico(s)Astronomical Observations and Instrumentation
Resumoview Abstract Citations (32) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The VELA star cloud. II. Early-type stars and long-period cepheids near the VELA Pulsar. Eggen, O. J. Abstract Intermediate band, H-beta and RI observations of some 200 stars and three Cepheids in a small region centered on the Vela pulsar have shown the presence of additional members of the Vela sheet (450 pc), as well as two more distant associations, Vel OB1 (800 pc) and Vel OB2 (1800 pc). Vel OB2, which may be only some 5-million yr old, probably contains SW (23.4 d), RZ (20.4 d), and SX (19.6 d) Vel. All three Cepheids have an overabundance of metals, relative to the sun, if the photometric indices are abundance dependent only. The luminosities of the three Cepheids, plus AH Vel in the Vela sheet and two other southern Cepheids discussed previously, all based on an independent photometric luminosity calibration, do not indicate a need for a major revision of the zero point of the period-luminosity relation. Publication: The Astrophysical Journal Supplement Series Pub Date: November 1982 DOI: 10.1086/190825 Bibcode: 1982ApJS...50..199E Keywords: Cepheid Variables; Early Stars; Pulsars; H Beta Line; Radio Interferometers; Stellar Luminosity; Tables (Data); Astronomy full text sources ADS | data products SIMBAD (212) GCPD (1) Related Materials (2) Part 1: 1980ApJ...238..627E Part 3: 1986AJ.....92.1074E
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