Astron. Astrophys. Suppl. Ser.
Volume 144, Number 3, June II 2000
|Page(s)||451 - 456|
|Published online||15 June 2000|
Spectroscopy and BVIC photometry of the young open cluster NGC 6604*
Osservatorio Astrofisico del Dipartimento di Astronomia, Università di Padova, I-36012 Asiago (VI), Italy
2 Osservatorio Astronomico di Padova, Sede di Asiago, I-36012 Asiago (VI), Italy
3 University of Ljubljana, Department of Physics, Jadranska 19, 1000 Ljubljana, Slovenia
Send offprint request to: R. Barbon, e-mail: email@example.com
Accepted: 21 March 2000
BVIC 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 years and a reddening EB-V= 1.02 ( from three independent methods). Pre-ZAMS objects are apparently not detected over the = 8.5 mag explored range. The cluster radial velocity is in agreement with the Hron (1987) model for the Galaxy disk rotation.
Key words: open clusters: general / open clusters: individual (NGC 6604)
© European Southern Observatory (ESO), 2000