Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.261l..35a&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 261, NO.4/APR15, P. L35, 1993
Astronomy and Astrophysics
Astronomy
34
Scientific paper
Observations of the continuum emission at 1.25 mm of 10 high-redshift (z > 3) and 10 intermediate-redshift (1.5 < z < 3) quasars, previously observed at 6 cm with the VLA, have been carried out with the SEST 1 5-m telescope in Chile and the IRAM 30-m antenna in Spain. Four detections at a level better than 30 and three marginal ones (2.8 σ and 2σ) have been achieved. On the basis of these data it is possible to investigate the expected turnover of the AGN submillimetre spectrum, since in the quasar rest frames the 1.25-mm continuum corresponds to emission around 230-500 microns. As far as radio-quiet objects are concerned, the mechanism responsible for part of this emission is probably thermal and can be ascribed to dust grains. We discuss the possibility that this dust belongs to the quasar host galaxies, implying evidence for cold dust in these galaxies. The extinction caused by this dust could account for the higher spectral indices of the UV spectra of the detected objects with respect to the non-detected ones.
Andreani Paola
Cristiani Stefano
La Franca Fabio
No associations
LandOfFree
Cold Dust around High-Redshift Quasars 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 Cold Dust around High-Redshift Quasars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cold Dust around High-Redshift Quasars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1373672