Position - 83.55628 -1.12246 (05 34 13.5 -01 07 20.9)
The STScI Digitized Sky Survey inage - 5 x 5 arc min
This star first came to my attention when data mining the results from the Wide-Field Infrared Survey Explorer(WISE) probe. I was searching for very cool objects - those brighter in the W4 band than in the W3 band - brighter in W3 than W2 - and brighter in W2 than W1.
When the positions of the objects were input into the Sloan Digital Sky Survey (SDSS) Bulk Spectra Search Facility it was disappointing that virtually none of these potential targets had a downloadable spectrum. The exception is shown below. What is noticable at a glance is the extremely high level of H-alpha activity
The target star is listed in "Candidate low-mass PMS in the Orion equatorial region". There is a link to the supporting article and to an earlier survey - The CIDA variability survey of Orion OB1. It is NOT listed in the CIDA variability survey but it does appear in the later study.
A substantial proportion of these PMS stars listed did have SDSS spectra. A sample of these are shown below and what is interesting is that none even come to close to the H-alpha activity level of the target star.
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Martin Piers Nicholson - Shropshire, United Kingdom.
This page was last updated on August 12th 2011.
