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Infrared variables in the field of OO VUL
The link shown above and this article underpin the science behind this project. To summarise - out of 759 stars with a spectral class of M0 or later only 48 (mainly M0) were NOT variable. The stars identified as possible targets in this project seem to be much later than M0 and so it is highly likely that they will be found to be variable
Animation of 120 second images in IR and V band
Click here to see a full sized image.
I have identified ten more stars - from a much larger number of candidates - that exhibit similar characteristics to the previously catalogued variable stars - that is that they are very much brighter in the infrared. It has been suggested that the optically thick circumstellar shells absorb the optical emission of the central star and that this causes the observed effect.
OO VUL was one of 123 Mira variables identified by Rosino and Guzzi in a deeply dust obscured 30 square degrees area of the sky. In their article the two authors concluded by saying :-
Targets needing further study
| Number | RA | DEC |
| 1 | 19 21 02.62 | +20 06 58.0 |
| 2 | 19 21 14.80 | +20 09 40.6 |
| 3 | 19 21 48.79 | +20 06 12.5 |
| 4 | 19 21 18.63 | +19 55 27.2 |
| 5 | 19 22 37.13 | +19 58 33.9 |
| 6 | 19 22 00.17 | +20 16 29.6 |
| 7 | 19 22 03.84 | +20 14 00.7 |
| 8 | 19 21 55.71 | +20 12 09.9 |
| 9 | 19 21 47.50 | +20 13 20.9 |
| 10 | 19 20 10.43 | +20 06 48.9 |
Return to Short Projects and Targets of Opportunity
In collaboration with the Remote Astronomical Society Observatory
Martin Nicholson - Daventry, United Kingdom.
This page was last updated on January 21st 2008.
