| Apresentação/Painel: | |
| Autor: | Elysandra Figuerêdo1 |
| Augusto Damineli1 | |
| Felipe Navarete1 | |
| Robert D. Blum2 | |
| Peter S. Conti3 | |
| Instituição: | 1IAG/USP - São Paulo |
| 2NOAO Gemini Science Center - Tucson | |
| 3Univeristy of Colorado | |
| Formato: | Painel |
| Título: | GNIRS and NIRI Spectroscopy of Massive Objects in GHIIR |
| Resumo: | We present Gemini North (NIRI) and Gemini South (GNIRS) K-band spectra of newly born OB stars in the obscured Galactic giant HII region W51A and G331.5-0.1 respectively. Our results constrain the distance of both regions, breaking the ambiguity in the distance determinations from radio techniques. O-type stars are identified, classified and the spectroscopic parallaxes indicate a distance smaller than the kinematic values in both cases. As a consequence, both regions are fainter than previously determined. As with the other radio selected GHII regions we have studied previously, our spectra revel other massive objects still accreting matter. |
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