New old PN in the southern sky.
Abstract
From a search of 417 ESO R and 112 SERC J film copies, 16 new planetary nebulas have been found. All of them are of very low surface brightness and range in angular diameter from 0.1 to 6 arcmin. They are highly evolved objects. The central stars have apparent magnitudes of m(j) between 17.5 and 22.0; for these estimates, a series of direct measurements of image diameters was carried out for stars of known magnitude to provide a calibration. Three of our nebulas are coincident with IRAS point sources; for two of them, several physical parameters could be derived.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- March 1990
- Bibcode:
- 1990MNRAS.243..236M
- Keywords:
-
- Planetary Nebulae;
- Southern Sky;
- Brightness Distribution;
- Cosmic Dust;
- Sky Surveys (Astronomy);
- Stellar Magnitude;
- Astronomy