Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-12-09
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
34 pages, 8 figures
Scientific paper
We present CCD photometric distance estimates of 100 SCR (SuperCOSMOS RECONS) systems with $\mu$ $\geq$ 0$\farcs$18/yr, 28 of which are new discoveries previously unpublished in this series of papers. These distances are estimated using a combination of new $VRI$ photometry acquired at CTIO and $JHK$ magnitudes extracted from 2MASS. The estimates are improvements over those determined using photographic plate $BRI$ magnitudes from SuperCOSMOS plus $JHK$, as presented in the original discovery papers. In total, 77 of the 100 systems investigated are predicted to be within 25 pc. If all 77 systems are confirmed to have $\pi$$_{trig}$ $\ge$ 40 milliarcseconds, this sample would represent a 23% increase in M dwarf systems nearer than 25 pc in the southern sky.
Finch Charlie T.
Hambly Nigel C.
Henry Todd J.
Jao Wei Chun
Subasavage John P. Jr.
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