Near-IR imaging photometry of NGC 1333: a 3-μm imaging survey
Abstract
We combine new near-infrared 3.42-μm imaging photometry with JHK data from Paper I to further probe the membership and physical characteristics of the embedded pre-main-sequence (PMS) population in the active star formation region NGC 1333-S. Our new data set covers approximately 44 per cent of the 10x10 arcmin^2 area previously surveyed. In the current survey region we have detected 36 sources, 26 being brighter than our 5sigma limiting magnitude of m_L=12.2. These 36 objects represent 45 per cent of the 80 objects detected in the same region at K. From a near-IR J-K versus K-L colour-colour diagram we infer the evolutionary state of the stars and compare the results with those obtained from our JHK data. We additionally discuss the effect of 3.08-μm ice absorption on photometry at 3.42mum for heavily embedded objects.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 1997
- DOI:
- 10.1093/mnras/289.1.1
- Bibcode:
- 1997MNRAS.289....1A
- Keywords:
-
- CIRCUMSTELLAR MATTER;
- STARS: FORMATION;
- STARS: PRE-MAIN-SEQUENCE;
- DUST;
- EXTINCTION: ISM: INDIVIDUAL: NGC 1333: INFRARED: STARS