SIMBAD references

2005A&A...440.1061L - Astronomy and Astrophysics, volume 440, 1061-1078 (2005/9-4)

Spectroscopic classification of red high proper motion objects in the Southern Sky.

LODIEU N., SCHOLZ R.-D., McCAUGHREAN M.J., IBATA R., IRWIN M. and ZINNECKER H.

Abstract (from CDS):

We present the results of spectroscopic follow-up observations for a sample of 71 red objects with high proper motions in the range 0.08-1.14arcsec/yr as detected using APM and SSS measurements of multi-epoch photographic Schmidt plates. Red objects were selected by combining the photographic BJRI magnitudes with 2MASS near-infrared JHKs magnitudes. Some 50 of the 71 spectroscopically classified objects turn out to be late-type (>M6) dwarfs and in more detail, the sample includes 35 ultracool dwarfs with spectral types between M8 and L2, some previously reported, as well as five M-type subdwarfs, including a cool esdM6 object, SSSPM J0500-5406. Distance estimates based on the spectral types and 2MASS J magnitudes place almost all of the late-type (>M6) dwarfs within 50pc, with 25 objects located inside the 25pc limit of the catalogue of nearby stars. Most of the early-type M dwarfs are located at larger distances of 100-200pc, suggesting halo kinematics for some of them. All objects with Hα equivalent widths larger than 10Å have relatively small tangential velocities (<50km/s). Finally, some late-type but blue objects are candidate binaries.

Abstract Copyright:

Journal keyword(s): surveys - stars: kinematics - stars: late-type - stars: low-mass, brown dwarfs - techniques: photometric - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/440/1061): main.dat obslog1.dat obslog2.dat obslog3.dat table5.dat table6.dat table7.dat>

Simbad objects: 98

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