Ionised, Atomic, and Molecular Gas around the Twin Radio Jets of NGC1052

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dc.creatorVermeulen, R. C.
dc.creatorRos, E.
dc.creatorZensus, J. A.
dc.creatorKellermann, K. I.
dc.creatorCohen, M. H.
dc.creatorvan Langevelde, H. J.
dc.date2003-04-10
dc.date.accessioned2026-07-07T02:08:14Z
dc.date.available2026-07-07T02:08:14Z
dc.descriptionThe bright radio structure of the LINER elliptical galaxy NGC1052 is dominated by bi-symmetric jets on parsec scales. Features move outward on both sides of the core at v_{app}~0.26c. We have established the occurrence of free-free absorption, and suggest the presence of a patchy, geometrically region oriented roughly orthogonal to the jets; components have a wide range of spectral shapes and brightness temperatures. We distinguish three velocity systems in HI absorption. The ``high velocity'' system is the most prominent of these; it is redshifted from systemic by about 150 km/s. In HI VLBI it is seen towards both jets, but appears to be restricted to a shell 1 to 2 pc away from the core. The central hole might be largely ionised, and could be connected to the free-free absorption. WSRT spectroscopy shows 1667 and 1665 MHz OH main line absorption over at least the full ~250 km/s velocity range seen in HI. In the ``high velocity'' system, the profiles of the OH main lines and HI are similar, which suggests co-location of molecular and atomic gas. The OH satellite lines are also detected in the ``high velocity'' system: 1612 MHz in absorption and 1720 MHz in emission, with complementary strength. But we have no satisfactory model to explain all properties; the connection to H_2O masing gas at the same velocity but apparently a different location is also unclear.
dc.descriptionTo be published in "Radio Astronomy at the Fringe", ASP Conf. Ser. Vol. 300, J. A. Zensus, M. H. Cohen, & E. Ros (eds.). 4 pages, 2 figures, needs rafringe.sty
dc.identifierhttps://arxiv.org/abs/astro-ph/0304193
dc.identifierhttp://arxiv.org/abs/astro-ph/0304193
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/5963
dc.subjectAstrophysics
dc.titleIonised, Atomic, and Molecular Gas around the Twin Radio Jets of NGC1052
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