2008/06/24 by S. E. Tremblay, G. B. Taylor, J. F. Helmboldt +2 · 1 citation
Physics and Astronomy · #Artificial intelligence #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Cosmic Phenomena #Computer science #Core (optical fiber) #Galaxy #Gamma-ray bursts and supernovae #Object (grammar) #Optics #Physics #Very Long Baseline Array #astro-ph
paper · pdf · doi:10.1086/590377
16 pages, 6 figures, 5 tables. Accepted for publication in ApJ
arxiv created 2008/06/24 · openalex publication_date 2008/08/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present multifrequency, multiepoch, 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 11 years shows the edge-brightened hot spots retreating toward the core (and slightly to the west) at approximately 0.3 c . 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.