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Astron. Astrophys. 345, L55-L57 (1999)

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7. Conclusions

We have discovered a bright ([FORMULA]) M5 dwarf on the basis of a new high proper motion survey in the southern sky (Scholz et al. 1999). The star shows emission lines in the optical spectrum and a relatively high X-ray luminosity of [FORMULA]. The distance estimate of [FORMULA] pc based on comparison of the observed spectrum with models is in agreement with two different values (11 and 14.5 pc) obtained from the spectral type. An effective temperature [FORMULA]=3100 K and solar metallicity were determined using "NextGen" model atmospheres for M dwarfs (Hauschildt, Allard & Baron 1999). The obtained radial velocity of [FORMULA] km s-1 and proper motion of [FORMULA] mas/yr allowed to calculate a heliocentric space velocity of [FORMULA] km s-1. The example of APMPM J0237-5928 shows that with our new proper motion survey we are able to find not only faint ([FORMULA]) candidates for very low-luminosity objects but also relatively bright ([FORMULA]) nearby stars.

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© European Southern Observatory (ESO) 1999

Online publication: April 28, 1999