| Title | An objective-prism survey of emission-line objects in M 31. |
| Authors | Meyssonnier, N.; Lequeux, J.; Azzopardi, M. |
| Bibcode | 1993A&AS..102..251M Search ADS ↗ |
| Abstract | Using GRENS plates taken at the Canada-France-Hawaii telescope, we have searched almost the whole extent of M 31 for small- diameter objects with strong emission lines. Most are planetary nebulae candidates, but there are also many Wolf-Rayet star candidates and small HII regions or compact parts of large HII regions. A catalogue is presented with a cross-identification with previous catalogues. Many new planetary nebulae and Wolf-Rayet candidates are found. Their distribution is compared with those of other tracers in M 31. In particular the distribution of planetary nebulae candidates is compared with that of the integrated blue light and we confirm the result obtained by Jacoby (1980) and Ciardullo et al. (1989): the number of planetary nebulae per unit total luminosity is a constant throughout the disk of M 31. The Wolf- Rayet star candidates are concentrated in the well-known ring of star formation; their total number is estimated as 300 within the limit of detection of the deepest existing surveys, but this may still be an underestimate of the true number. |
| Objects | 1515 Objects Search NED ↙ |
