Please use this identifier to cite or link to this item:
http://hdl.handle.net/2248/1662
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Subramaniam, A | - |
dc.contributor.author | Sahu, D. K | - |
dc.contributor.author | Sagar, R | - |
dc.contributor.author | Vijitha, P | - |
dc.date.accessioned | 2007-06-19T06:14:14Z | - |
dc.date.available | 2007-06-19T06:14:14Z | - |
dc.date.issued | 2005-09 | - |
dc.identifier.citation | Astronomy & Astrophysics, Vol. 440, pp. 511 - 522 | en |
dc.identifier.uri | http://hdl.handle.net/2248/1662 | - |
dc.description.abstract | We present UBV CCD photometry and low-resolution spectra of stars in the field of the young open cluster NGC 146. UBV photometry of 434 stars were used to estimate the E(B-V) reddening of 0.55 $\pm$ 0.04 mag and BV photometry of 976 stars were used to estimate a distance modulus of (m-M)0 = 12.7 $\pm$ 0.2 mag, corresponding to a distance of 3470 +335-305 pc. We estimated 10-16 Myr as the turn-off age for the upper main sequence of the cluster using isochrones and synthetic colour magnitude diagrams. We identified two B type stars with H$_\alpha$ in emission and located on the MS using slit-less spectra. A higher resolution spectrum of the brighter Be star indicated the presence of a number of emission lines, with some lines showing the signature of gas infall. This star was found to be located in the region of Herbig Ae/Be stars in the (J-H) vs. (H-K) colour-colour diagram. Thus, we identify this star as a Herbig Be star. On the other hand, 54 stars were found to show near infrared excess, of which 17 were found to be located in the region of Herbig Ae/Be stars and 18 stars were found to be located in the region of Be stars in the NIR colour-colour diagram. Thus NGC 146 is a young cluster with a large number of intermediate mass pre-main sequence stars. The turn-on age of the cluster is found to be ~3 Myr. Though NGC 146 shows an older turn off, the bulk of stars in this cluster seems to belong to the younger population of 3 Myr. | en |
dc.format.extent | 748935 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | en |
dc.publisher | EDP Sciences | en |
dc.relation.uri | http://arxiv.org/abs/astro-ph/0505314 | en |
dc.relation.uri | http://dx.doi.org/10.1051/0004-6361:20052683 | en |
dc.subject | Galaxy: open cluster and associations | en |
dc.subject | individual: NGC 146 -- stars: emission-line | en |
dc.subject | Be -- stars: Hertzsprung-Russell (HR) and C-M diagrams -- stars | en |
dc.title | NGC 146: a young open cluster with a Herbig Be star and intermediate mass pre-main sequence stars | en |
dc.type | Article | en |
Appears in Collections: | IIAP Publications Publications based on data from IAO, Hanle |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
NGC 146: a young open cluster | 731.38 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.