SIMBAD references

2001MNRAS.325.1441T - Mon. Not. R. Astron. Soc., 325, 1441-1457 (2001/August-3)

The stellar composition of the star formation region CMa R1 - II. Spectroscopic and photometric observations of nine young stars.

TJIN A DJIE H.R.E., VAN DEN ANCKER M.E., BLONDEL P.F.C., SHEVCHENKO V.S., EZHKOVA O.V., DE WINTER D. and GRANKIN K.N.

Abstract (from CDS):

We present new high- and low-resolution spectroscopic and photometric data of nine members of the young association CMa R1. All the stars have circumstellar dust at some distance, as could be expected from their association with reflection nebulosity. Four stars (HD52721, HD53367, LkHα220 and LkHα218) show Hα emission and we argue that they are Herbig Be stars with discs. Our photometric and spectroscopic observations of these stars reveal new characteristics of their variability. We present first interpretations of the variability of HD52721, HD53367 and the two LkHα stars in terms of a partially eclipsing binary, a magnetic activity cycle and circumstellar dust variations, respectively. The remaining five stars show no clear indications of Hα emission in their spectra, although their spectral types and ages are comparable with those of HD52721 and HD53367. This indicates that the presence of a disc around a star in CMa R1 may depend on the environment of the star. In particular we find that all Hα emission stars are located at or outside the arc-shaped border of the Hii region, which suggests that the stars inside the arc have lost their discs through evaporation by UV photons from nearby O stars, or from the nearby (<25pc) supernova, about 1Myr ago.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): circumstellar matter - stars: early-type - stars: evolution - stars: pre-main-sequence - stars: variables: other - open clusters and associations: individual: CMa R1

Simbad objects: 32

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2001MNRAS.325.1441T and select 'bookmark this link' or equivalent in the popup menu


2020.01.18-16:01:08

© Université de Strasbourg/CNRS

    • Contact