SIMBAD references

2007MNRAS.374.1253A - Mon. Not. R. Astron. Soc., 374, 1253-1263 (2007/February-1)

Pre-main-sequence stars in the Lagoon Nebula (M8).


Abstract (from CDS):

We report the discovery of new pre-main-sequence (PMS) stars in the Lagoon Nebula (M8) at a distance of 1.25 kpc, based on intermediate-resolution spectra obtained with the Boller & Chivens spectrograph at the 6.5-m Magellan I Telescope (Las Campanas Observatory, Chile). According to the spectral types, the presence of emission lines and the lithium λ6708 absorption line, we are able to identify 27 classical T Tauri stars, seven weak-lined T Tauri stars and three PMS emission objects with spectral type G, which we include in a separate stellar class denominated `PMS Fe/Ge class'. Using near-infrared photometry either from the Two-Micron All-Sky Survey or from our own previous work, we derive effective temperatures and luminosities for these stars and locate them in the Hertzsprung-Russell diagram, in order to estimate their masses and ages. We find that almost all of our sample stars are younger than 3x106 yr and span over a range of masses between 0.8 and 2.5 M. A cross-correlation between our spectroscopic data and the X-ray sources detected with the Chandra ACIS instrument is also presented.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): techniques: spectroscopic - stars: formation - stars: fundamental parameters - stars: pre-main-sequence

Nomenclature: Table 1: [ABM2007] NN (Nos 1-46).

Simbad objects: 58

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