Multifrequency interferometer and radio continuum monitoring observations of CTA 102Show others and affiliations
2003 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 42, no 5, p. 473-485Article in journal (Refereed) Published
Abstract [en]
This paper represents the work of several years of observation of CTA 102 with both single dish telescopes and
interferometric arrays, covering wavelengths from 1.2 cm to 1.3 mm. The resolution of the maps covers an order of magnitude
from 0.5 mas to 50 μas. The images presented demonstrate the rapid structural changes in this source. These rapid structural
changes correlates with the outbursts seen in the total flux, turnover frequency and in the spectral index. We have calculated the
Brightness Temperatures of the components (TB ) directly from the determined component sizes and also using the logarithmic
variability amplitudes and timescales to calculate the TB s. Both the methods yielded measurements of source frame T Bs no
higher than
∼a few × 10
12
K. We find that the observed average proper motion is
0.4 0.07 mas/yr, which corresponds to an
apparent transverse velocity of 11
± 2 c.
Place, publisher, year, edition, pages
Berlin: Springer, 2003. Vol. 42, no 5, p. 473-485
Keywords [en]
Shock waves, Quasars, Jets, Radiation mechanisms, CTA102
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:hh:diva-715DOI: 10.1051/0004-6361:20030579ISI: 000183615700011Scopus ID: 2-s2.0-0038722285Local ID: 2082/1064OAI: oai:DiVA.org:hh-715DiVA, id: diva2:237933
Note
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2007-06-042007-06-042025-10-01Bibliographically approved