The State of the Molecular Gas in a Luminous Starburst/Seyfert 2 Galaxy: NGC 1068 Revisited

1999 ◽  
Vol 516 (1) ◽  
pp. 114-126 ◽  
Author(s):  
Padeli P. Papadopoulos ◽  
E. R. Seaquist
Keyword(s):  
The State ◽  
Molecular Gas ◽  
Ngc 1068

High‐Resolution13CO and C18OJ= 1–0 Observations of NGC 1068: Molecular Gas Properties and a High C18O/13CO Intensity Ratio

1997 ◽  
Vol 477 (1) ◽  
pp. 518-518 ◽  
Author(s):  
Padeli P. Papadopoulos ◽  
E. R. Seaquist ◽  
N. Z. Scoville
Keyword(s):  
Intensity Ratio ◽  
Molecular Gas ◽  
Ngc 1068 ◽  
Gas Properties

scholarly journals Kinematics of molecular gas in the nucleus of NGC 1068, from H$\boldmath\mathsf{_{2}}$ line emission observed with VLT

2001 ◽  
Vol 369 (3) ◽  
pp. L33-L36 ◽  
Author(s):  
D. Alloin ◽  
E. Galliano ◽  
J. G. Cuby ◽  
O. Marco ◽  
D. Rouan ◽  
...  
Keyword(s):  
Line Emission ◽  
Molecular Gas ◽  
Ngc 1068

Bars and Warps Traced by the Molecular Gas in the Seyfert 2 Galaxy NGC 1068

2000 ◽  
Vol 533 (2) ◽  
pp. 850-868 ◽  
Author(s):  
E. Schinnerer ◽  
A. Eckart ◽  
L. J. Tacconi ◽  
R. Genzel ◽  
D. Downes
Keyword(s):  
Molecular Gas ◽  
Ngc 1068

scholarly journals Deep millimeter spectroscopy observations toward NGC 1068

2018 ◽  
Vol 613 ◽  
pp. A3 ◽  
Author(s):  
Jianjie Qiu ◽  
Junzhi Wang ◽  
Yong Shi ◽  
Jiangshui Zhang ◽  
Min Fang ◽  
...  
Keyword(s):  
Carbon Chain ◽  
Parameters Estimation ◽  
Physical Parameters ◽  
Molecular Gas ◽  
Chain Molecules ◽  
External Galaxies ◽  
On Line ◽  
Ngc 1068 ◽  
First Time ◽  
Millimeter Spectroscopy

Aims. We aim for a better understanding of gas properties in the circum-nuclear disk (CND) region of the nearby gas-rich Seyfert 2 galaxy NGC 1068. We focus on line identification and the basic physical parameters estimation of molecular gas in the CND region. Methods. We used the IRAM 30 m telescope to conduct deep millimeter spectroscopy observations toward the center of NGC 1068. Results. Thirty-two lines were detected in this galaxy, 15 lines of wich were detected for the first time. With a sensitivity better by about a factor of 4 than observations in the literature for this source at 3 mm band, we detected several weak lines for the first time in this source, such as lines from CH3CCH, CH3OCH3, and HC18O+. Column densities of these molecules were estimated based on line emissions. Some marginal detections in the literature, such as HN13C (1–0), were confirmed. CH3OCH3 was detected for the first time in external galaxies. Lines from several carbon chain molecules and shock-related molecules were also detected in this source.

Molecular Gas in the Centers of Barred and Starburst Galaxies

1994 ◽  
Vol 140 ◽  
pp. 282-292
Author(s):  
Jeffrey D. P. Kenney
Keyword(s):  
Star Formation ◽  
Large Scale ◽  
Starburst Galaxy ◽  
Molecular Gas ◽  
Barred Galaxies ◽  
Twin Peaks ◽  
Ngc 1068 ◽  
Lindblad Resonance ◽  
Inner Lindblad Resonance ◽  
Co Emission

AbstractHigh resolution interferometric CO maps of the circumnuclear regions of several barred galaxies show intense CO emission arising from twin peaks, which are oriented perpendicular to the large-scale stellar bars and located where dust lanes intersect nuclear rings of HII regions. These twin gas concentrations can be explained by the crowding of gas streamlines near stellar inner Lindblad resonances. In the barred nuclear starburst galaxy NGC 3504, a large concentration of molecular gas is centered on the nucleus, apparently inside an inner Lindblad resonance. Star formation is consuming the gas most rapidly where the rotation curve is nearly solid body, suggesting that tidal shear helps control the rate of star formation. A comparison with M82 and NGC 1068 suggests that the starburst in NGC 3504 is in an early phase of its evolution, and that starburst evolution is strongly influenced by shear.

scholarly journals Extended Gas in Interacting Systems

1999 ◽  
Vol 186 ◽  
pp. 89-96
Author(s):  
F. Combes
Keyword(s):  
Star Formation ◽  
Interaction Process ◽  
The State ◽  
Significant Fraction ◽  
Interacting Galaxies ◽  
Molecular Gas ◽  
Interstellar Gas ◽  
Dynamical Mass ◽  
Interacting Systems ◽  
Tidal Tails

HI observations have revealed large gaseous extensions in interacting and merging systems. The interstellar gas is obviously dragged out in tidal tails during an encounter, and the percentage of HI in the tails increases with the merging stage. However, the opposite is true for the molecular gas, which is observed highly concentrated towards the nuclei of interacting galaxies, amounting to a significant fraction of the dynamical mass. Statistically, there appears to be more gas observed in interacting galaxies than in normal, isolated ones. As N-body simulations show, the gas is driven inwards in the interaction process by the strong gravity torques, before being consumed through star formation in the triggered starbursts. We review here all observations that could bring more knowledge about the state of the gas in the outer parts of galaxies, and about accretion processes. The link with the observations of the Lyα absorbers at low and high redshifts is discussed.

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