High-Resolution 13CO and C 18O J = 1--0 Observations of NGC 1068: Molecular Gas Properties and a High C 18O/ 13CO Intensity Ratio

Citations Over TimeTop 10% of 1996 papers

Abstract

We present high-resolution (~5"-6") aperture synthesis observations of ^13^CO and C^18^O J = 1-0 lines in the prototypical Seyfert 2 galaxy NGC 1068. The line ratio S_nu_(^12^CO)/S_nu_(^13^CO) varies significantly along the ring, indicating optical depth variations. We also find a high average line ratio <R>=<S_nu_(C^18^O)/S_nu_(^13C^O) > = 0.3, which is almost twice the highest value in our own galaxy. This is also one of the highest values reported to date for an extragalactic source and the first such measurement for Seyfert galaxies. We argue that such a high value could be the result of optical depth effects and/or an intrinsically high [C^18^O/^13^CO] abundance.

Related Papers

• → Giant outburst from the supergiant fast X-ray transient IGR J17544−2619: accretion from a transient disc?(2015)50 cited
• → Eddington Accretion and QSO Emission Lines at z ~2(2003)57 cited
• → An X-ray fading, UV brightening QSO at z ≈ 6(2022)9 cited
• Susquehanna Chorale Spring Concert "Roots and Wings"(2017)
• → An X-ray fading, UV brightening QSO at $z\approx6$(2022)