Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...105..107k&link_type=abstract
Astronomy and Astrophysics, vol. 105, no. 1, Jan. 1982, p. 107-119.
Astronomy and Astrophysics
Astrophysics
124
Binary Stars, Hertzsprung-Russell Diagram, Quasars, Stellar Spectrophotometry, Blue Stars, Color-Color Diagram, Compact Galaxies, Error Analysis, Numerical Integration, Star Distribution, Stellar Magnitude
Scientific paper
U, J, F, and N band photometric measurements were conducted for all objects in the field of Sa 68, with attention to those images classified by size as stellar. Those objects in the stellar set which do not lie in the domain of Galactic stars in color-color diagrams are discussed with respect to statistics. Because the volume of U-J, J-F, and F-N space occupied by common stars is small, a complete sample of all extragalactic objects of stellar appearance is expected from this technique. Increasing errors in both colors and classifications set a J value limit of less than about 23. It is determined that: (1) the candidate extragalactic objects have colors similar to brighter QSOs; (2) no evidence is seen for a class of distant, compact galaxies predominantly radiating by starlight; and (3) as anticipated by radio and X-ray observation constraints, the QSO counts flatten for J values greater than about 21.
Koo David C.
Kron Richard G.
No associations
LandOfFree
QSO counts - A complete survey of stellar objects to B = 23 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with QSO counts - A complete survey of stellar objects to B = 23, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and QSO counts - A complete survey of stellar objects to B = 23 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1454999