Spectroscopy and BVI_C photometry of the young open cluster NGC 6604
Abstract
BVI_C photometry and classification spectroscopy is presented for the young open cluster NGC 6604. Additional Echelle spectroscopy of the brightest members is used to check the reddening against the interstellar NaI and KI absorption lines, to measure the cluster radial velocity and to derive the individual rotational velocities. We obtain 1.7 kpc as the cluster distance, an age of ~ 5 106 years and a reddening EB-V= 1.02 (+/- 0.01 from three independent methods). Pre-ZAMS objects are apparently not detected over the bigtriangleup m = 8.5 mag explored range. The cluster radial velocity is in agreement with the \cite[Hron (1987)]{hro87} model for the Galaxy disk rotation. Based on observations secured with the telescopes of the South African Astronomical Observatory (SAAO) and those of the Padova and Asiago Astronomical Observatories.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- June 2000
- DOI:
- 10.1051/aas:2000193
- arXiv:
- arXiv:astro-ph/0004012
- Bibcode:
- 2000A&AS..144..451B
- Keywords:
-
- OPEN CLUSTERS: GENERAL;
- OPEN CLUSTERS: INDIVIDUAL (NGC 6604);
- Astrophysics
- E-Print:
- accepted in Astron.Astrophys.Suppl. Figure 2 is degraded in resolution