Contents
Images
Upload your image
DSS Images Other Images
Related articles
UBV photometry of HD stars in the fields of selected cataclysmic variables.
Not Available
| A magnitude limited stellar X-ray survey and the F star X-ray luminosity function
An X-ray survey has been conducted of stars brighter than visualmagnitude 8.5 that have serendipitously fallen into the fields of viewof the Imaging Proportional Counter of the Einstein Observatory. Thesurvey includes 227 separate 1 x 1 deg fields, containing 274 stars witha visual magnitude of no more than 8.5 and covering a wide range ofspectral types and luminosity classes. X-ray emission was detected from33 stars, and upper limits have been determined for the remainder of thesample. F type stars dominate the detected sample, and most of these areshown to be dwarfs. An X-ray luminosity function for dF stars has beendeduced, and reveals that the average 0.2-4.0 keV luminosity of thesestars is around 10 to the 29th erg/sec. Constraints have been placed onthe high luminosity tails and medians of the X-ray luminosity functionsfor other types of stars.
|
Submit a new article
Related links
Submit a new link
Member of following groups:
|
Observation and Astrometry data
| Constellation: | Sagittarius |
| Right ascension: | 18h31m20.46s |
| Declination: | -23°18'56.4" |
| Apparent magnitude: | 7.684 |
| Distance: | 233.1 parsecs |
| Proper motion RA: | 4 |
| Proper motion Dec: | -0.8 |
| B-T magnitude: | 9.336 |
| V-T magnitude: | 7.821 |
Catalogs and designations:
|
