REVIEW
High Frequency Peakers: Baby Radio Sources?
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
We present the results of second epoch simultaneous multifrequency observations of 45 sources out of the 55 in the sample of High Frequency Peakers (HFP) by Dallacasa et al. (2000). Seven of the stellar sources (i.e. 16% of the total number of sources and 26% of the stellar fraction) no longer show a convex spectrum and are thus likely to be flat spectrum quasars in an outburst phase during the first epoch of observations. The rest frame peak frequency distribution of HFP quasars extends up to ~45 GHz while that of HFP galaxies is confined to $\le 17$ GHz. Imaging at 1.465 GHz and 1.665 GHz has revealed extended emission for 31% of sources, a substantially larger fraction than found for GPS sources (~10%). In the case of HFP quasars, but not of HFP galaxies, extended emission is associated with strong variability, consistent with a core-jet structure.
Discussion (0). Sign in to comment.