A circumnuclear molecular torus in NGC 1365
نویسنده
چکیده
The central region of NGC 1365 has been mapped in the J = 3 − 2 CO emission line with the 15 m SEST, which has a HPBW of 15′′ at the frequency of this transition. The observing grid has a 5′′-spacing in the inner and a 10′′-spacing in the outer region. A deconvolved map has been produced using the Maximum Entropy Method (MEM). A circumnuclear molecular torus with a radius of about 6. ′′5 is the dominant feature. Molecular emission is also seen coming from various dust streamers in the bar of the galaxy. Four new molecular species have been detected in NGC 1365, namely HCN, HCO+, H2CO and CS. 13CO has also been observed in the nuclear region.
منابع مشابه
Imaging the Circumnuclear Region of NGC 1365 with Chandra
We present the first Chandra/ACIS imaging study of the circumnuclear region of the nearby Seyfert galaxy NGC 1365. The X-ray emission is resolved into point-like sources and complex, extended emission. The X-ray morphology of the extended emission shows a biconical soft X-ray emission region extending ∼5 kpc in projection from the nucleus, coincident with the high excitation outflow cones seen ...
متن کاملX - ray observations of NGC 1365 : time - resolved eclipse of the X - ray source
We present an extraordinary variation of the X-ray spectrum of the obscured AGN in NGC 1365, which was observed by Chandra to change from Compton-thin to Compton-thick and back to Compton-thin in four days. This fast variation imply a a size of ∼ 10 14 cm for the emitting region, and an extremely compact size (∼ 10 16 cm) of the clumpy circumnuclear absorber.
متن کاملO maser and a plasma obscuring torus in the radio galaxy NGC 1052
Key words Editorial notes – instruction for authors We present multi-frequency simultaneous VLBA observations at 15, 22 and 43 GHz towards the nucleus of the nearby radio galaxy NGC 1052. These three continuum images reveal a double-sided jet structure, whose relative intensity ratios imply that the jet axis is oriented close to the sky plane. The steeply rising spectra at 15–43 GHz at the inne...
متن کاملProbing circumnuclear molecular gas in NGC 5793 with OH absorption
We have observed the nuclear region of an edge-on spiral galaxy NGC 5793 with VLBI in order to determine the morphology of the central continuum source at 6 and 18 cm and the distribution of OH molecular gas at 18 cm on parsec scales. NGC 5793, with a type 2 Seyfert nucleus, is known to have peculiar H2O maser features in its center, indicating the presence of a rotating disk/torus (Hagiwara et...
متن کاملPositional Coincidence of H 2 O Maser and a Plasma Obscuring Torus in Radio Galaxy NGC 1052
We present multi-frequency simultaneous VLBA observations at 15, 22 and 43 GHz towards the nucleus of the nearby radio galaxy NGC 1052. These three continuum images reveal a double-sided jet structure, whose relative intensity ratios imply that the jet axis is oriented close to the sky plane. The steeply rising spectra at 15–43 GHz at the inner edges of the jets strongly suggest that synchrotro...
متن کامل