A shrinking Compact Symmetric Object: J11584+2450?

Details A shrinking Compact Symmetric Object: J11584+2450? A shrinking Compact Symmetric Object: J11584+2450?

2008-06-24

arxiv.org/abs/0806.3955v1

Astronomy and Astrophysics

Astrophysics

16 pages, 6 figures, 5 tables. Accepted for publication in ApJ

Scientific paper

10.1086/590377

We present multi-frequency multi-epoch Very Long Baseline Array (VLBA) observations of J11584+2450. These observations clearly show this source, previously classified as a core-jet, to be a compact symmetric object (CSO). Comparisons between these new data and data taken over the last 9 years shows the edge brightened hot spots retreating towards the core (and slightly to the west) at approximately 0.3c. Whether this motion is strictly apparent or actually physical in nature is discussed, as well as possible explanations, and what implications a physical contraction of J11584+2450 would have for current CSO models.

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