Spectroscopy of early-type star candidates in M 33 and NGC 6822. II^*

¹ INAF - Catania Astrophysical Observatory, via S. Sofia n. 78, 95123, Catania, Italy e-mail: scuderi@ct.astro.it
² Center for Astrophysical Sciences, The Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218-2695, USA e-mail: bianchi@pha.jhu.edu
³ Instituto de Astrofisica de Canarias, via Láctea, 38200 La Laguna, Tenerife, Spain e-mail: amt@ll.iac.es
⁴ Consejo Superior de Investigaciones Cientificas, Spain

Corresponding author: G. Catanzaro, gca@ct.astro.it

Received: 18 September 2002
Accepted: 5 March 2003

Abstract

We present ground-based spectra of early-type star candidates in the Local Group galaxies M 33 and NGC 6822 taken at the 4.2 m William Herschel Telescope (La Palma, Spain). Photospheric parameters T_eff and were derived by LTE modeling of the Balmer lines. When possible, mass-loss rates were calculated from the H_α profiles computing emission and scattering in the wind with the method of Scuderi et al. ([CITE]). Five hot star candidates were found in M 33, out of seven stars analyzed, and two out of three in NGC 6822.