Mathematics
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997srq..book.....r&link_type=abstract
Search for red QSOs., by Reuther, K. M.. Heidelberg Univ. (Germany). Naturwissenschaftlich-Mathematische Gesamtfakultät, May 19
Mathematics
Scientific paper
A search for red QSOs should clarify if there is a class of red, radio-quiet QSOs. The author therefore surveyed 12 fields (0.3 square degrees in total) at high galactic latitude (b > 60°) with low IRAS-100-μ-flux (<1 MJy/sr). CCD-exposures of the fields were obtained through the Johnson BVRI broadband filters, in which all point-sources up to a limit of mV = 20.5 mag were detected. In order to obtain spectra the author observed 820 candidates with the fiber-fed multi-object-spectrograph "Spaltspinne". Spectra with a SNR > 5 were obtained for 333 candidates, among them are 20 extragalactic objects: 17 galaxies, one Seyfert galaxy and two QSOs. In addition there are two QSO-candidates with SNR < 5. QSO Q134343+2643 (z = 1.20) has a spectrum of a typical blue QSO, whereas Q231722-0523 (z = 0.54) is reddened. A mean QSO spectrum from the Large Bright Quasar Survey is most similar to the red QSO whwn one includes an extinction of AV = 1.5 mag. The author interprets that to mean the QSO is reddened by dust intrinsic to the QSO. The dust might be found in a torus around the center of the QSO or in its host galaxy. With this observation he has detected the first optically selected red QSO.
No associations
LandOfFree
Search for red QSOs. 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 Search for red QSOs., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Search for red QSOs. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1147724