Red and nebulous objects in dark clouds : a survey.
Abstract
A search on the NGS-PO Sky Survey photographs has revealed 150 interesting nebulous and/or red objects, mostly lying in dark clouds and not previously catalogued. Spectral classifications are presented for 55 objects. These indicate a small number of new members of the class of Herbig-Haro objects, a significant number of new T Tauri stars, and a few emission-line hot stars. It is argued that hot, high-mass stars form preferentially in the dense cores of dark clouds. The possible symbiosis of high and low mass stars is considered. A new morphology class is defined for cometary nebulae, in which a star lies on the periphery of a nebulous ring.
- Publication:
-
The Astronomical Journal
- Pub Date:
- January 1980
- DOI:
- 10.1086/112630
- Bibcode:
- 1980AJ.....85...29C
- Keywords:
-
- Astronomical Photography;
- Hot Stars;
- Nebulae;
- Stellar Radiation;
- T Tauri Stars;
- Classifications;
- Comets;
- Emission Spectra;
- Sky Surveys (Astronomy);
- Stellar Mass;
- Astrophysics