Radio spectra of OH471 and OQ172

Radio spectra of OH471 and OQ172

RADIO spectra for the highly redshifted z ≥ 3.40 quasars OH471 (ref. 1) and OQ172 (ref. 2) are presented here for frequencies between 16.7 MHz and 85.3 GHz. The spectra are complex. Both have a peak at or near 1.4 GHz and a second peak near or above 85 GHz. Both have a low frequency cutoff, the one...

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Veröffentlicht in:Nature (London) 1974-06, Vol.249 (5459), p.743-746
Hauptverfasser: GEARHART, MIRJANA R., KRAUS, JOHN D., ANDREW, BRYAN H., BLAKE, GLEN, SCOTT, PAUL, RYLE, MARTIN, BRAUDE, S. YA, SHARYKIN, N. K., ZHOUCK, I. N., BRIDLE, ALAN H., CONKLIN, EDWARD K., DOUGLAS, JAMES N., HACHENBERG, O., THIEL, M., KAUFMANN, PIERRE, PURTON, C. R., FELDMAN, P. A., MARSH, K. A., STULL, MARK A., PRICE, KENT, WARNER, J. W., ASSOUSA, G., BALICK, B.
Format: Artikel
Sprache:eng
Schlagworte:
COSMIC RADIO SOURCES
FLUX DENSITY
Humanities and Social Sciences
letter
multidisciplinary
N56300 > Physics (Astrophysics & Cosmology) > Quasi-stellar, Radio & X-Ray Sources
QUASARS > SPECTRA
RADIOWAVE RADIATION
Science
Science (multidisciplinary)
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Zusammenfassung:RADIO spectra for the highly redshifted z ≥ 3.40 quasars OH471 (ref. 1) and OQ172 (ref. 2) are presented here for frequencies between 16.7 MHz and 85.3 GHz. The spectra are complex. Both have a peak at or near 1.4 GHz and a second peak near or above 85 GHz. Both have a low frequency cutoff, the one for OH471 being especially sharp. OH471 sometimes seems to be variable at 31 GHz on a time scale of days but the source appears to be stable at 10.7 and 22 GHz.
ISSN:0028-0836
1476-4687
DOI:10.1038/249743a0