Metallicity of low-mass stars in Orion

Details Metallicity of low-mass stars in Orion Metallicity of low-mass stars in Orion

2009-05-12

arxiv.org/abs/0905.1840v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

13 pages, accepted for publication in A&A

Scientific paper

Determining the metal content of low-mass members of young associations provides a tool that addresses different issues, such as triggered star formation or the link between the metal-rich nature of planet-host stars and the early phases of planet formation. The Orion complex is a well known example of possible triggered star formation and is known to host a rich variety of proto-planetary disks around its low-mass stars. Available metallicity measurements yield discrepant results. We analyzed FLAMES/UVES and Giraffe spectra of low-mass members of three groups/clusters belonging to the Orion association. Our goal is the homogeneous determination of the metallicity of the sample stars, which allows us to look for [Fe/H] differences between the three regions and for the possible presence of metal-rich stars. Nine members of the ONC and one star each in the $\lambda$ Ori cluster and OB1b subgroup were analyzed. After the veiling determination, we retrieved the metallicity by means of equivalent widths and/or spectral synthesis using MOOG. We obtain an average metallicity for the ONC [Fe/H]=-0.01\pm 0.04. No metal-rich stars were detected and the dispersion within our sample is consistent with measurement uncertainties. The metallicity of the $\lambda$ Ori member is also solar, while the OB1b star has an [Fe/H] significantly below the ONC average. If confirmed by additional [Fe/H] determinations in the OB1b subgroup, this result would support the triggered star formation and the self-enrichment scenario for the Orion complex.

Affiliated with

Also associated with

No associations

Rating

Metallicity of low-mass stars in Orion does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Metallicity of low-mass stars in Orion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metallicity of low-mass stars in Orion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-337199