A NEW YOUNG STELLAR OBJECT IN THE S-187 COMPLEX - PHOTOMETRY AND SPECTROSCOPY

We report the discovery in the S 187 complex of a young stellar object with an optical counterpart. High resolution spectroscopy in the red and near infrared indicates that this object is a pre-main-sequence st ar. In the red, the spectrum is dominated by a very bright Her line wi th a total width (wing to wing) greater than 1000 km s(-l). This line exhibits a special type of P Cygni profile (Beals's Type III). The obj ect's near infrared spectrum is dominated by the Ca II triplet emissio n at 8498 Angstrom, 8542 Angstrom, and 8662 Angstrom; these lines are broad and optically thick. Numerous Fe I and Fe II emission lines are observed also. B, V, R, I, H, K, and L magnitudes of the object, as we ll as its Ha luminosity, indicate that it is probably a Herbig late Be or early Ae star. It presents many characteristics of the ''outflow g roup'' of Herbig stars identified by Hamann and Persson (1992b); it is very similar, both in luminosity and geometry, to the well-known youn g stellar objects V645 Cyg and R Mon.