SIMBAD references

2014MNRAS.439.3890G - Mon. Not. R. Astron. Soc., 439, 3890-3907 (2014/April-3)

Spectroscopic signatures of youth in low-mass kinematic candidates of young moving groups.

GALVEZ-ORTIZ M.C., KUZNETSOV M., CLARKE J.R.A., PAVLENKO Ya.V., FOLKES S.L., PINFIELD D.J., JONES H.R.A., JENKINS J.S., BARNES J.R., BURNINGHAM B., DAY-JONES A.C., MARTIN E.L., GARCIA PEREZ A.E., DEL BURGO C. and POKORNY R.S.

Abstract (from CDS):

We present a study of age-related spectral signatures observed in 25 young low-mass objects that we have previously determined as possible kinematic members of five young moving groups: the Local Association (Pleiades moving group, age = 20-150Myr), the Ursa Major group (Sirius supercluster, age = 300Myr), the Hyades supercluster (age = 600Myr), IC 2391 supercluster (age = 35-55Myr) and the Castor moving group (age = 200Myr). In this paper we characterize the spectral properties of observed high- or low-resolution spectra of our kinematic members by fitting theoretical spectral distributions. We study signatures of youth, such as lithium i 6708Å, Hα emission and other age-sensitive spectroscopic signatures in order to confirm the kinematic memberships through age constraints. We find that 21 (84 per cent) targets show spectroscopic signatures of youth in agreement with the age ranges of the moving group to which membership is implied. For two further objects, age-related constraints remain difficult to determine from our analysis. In addition, we confirm two moving group kinematic candidates as brown dwarfs.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): brown dwarfs - stars: kinematics and dynamics - stars: low-mass

Simbad objects: 92

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2019.12.07-14:47:22

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