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ALMA Observations of Warm Molecular Gas and Cold Dust in NGC 34 by Xu, C. K.; Cao, C.; Lu, N.; Gao, Y.; Van Der Werf, P.; Evans, A. S.; Mazzarella, J. M.; Chu, J.; Haan, S.; Diaz-Santos, T.; Meijerink, R.; Zhao, Y. -H.; Appleton, P.; Armus, L.; Charmandaris, V.; Lord, S.; Murphy, E. J.; Sanders, D. B.; Schulz, B.; Stierwalt, S. is a scholarly article available to read on EtoBox.

What is ALMA Observations of Warm Molecular Gas and Cold Dust in NGC 34 about?

We present ALMA Cycle-0 observations of the CO (6-5) line emission (rest-frame frequency = 691.473 GHz) and of the 435$\mu m$ dust continuum emission in the nuclear region of NGC 34, a local luminous infrared galaxy (LIRG) at a distance of 84 Mpc (1" = 407 pc) which contains a Seyfert 2 active galactic nucleus (AGN) and a nuclear starburst. The CO emission is well resolved by the ALMA beam ($\rm 0."26\times 0."23$), with an integrated flux of $\rm f_{CO~(6-5)} = 1004\; (\pm 151) \; Jy\; km\; s^{-1}$. Both the morphology and kinematics of the CO (6-5) emission are rather regular, consistent with a compact rotating disk with a size of 200 pc. A significant emission feature is detected on the red-shifted wing of the line profile at the frequency of the $\rm H^{13}CN\; (8-7)$ line, with an integrated flux of $\rm 17.7 \pm 2.1 (random) \pm 2.7 (sysmatic)\; Jy\;km\; s^{-1}$. However, it cannot be ruled out that the feature is due to an outflow of warm dense gas with a mean velocity of $\rm 400\; km\; s^{-1}$. The continuum is resolved into an elongated configuration, and the observed flux corresponds to a dust mass of $\rm M_{dust} = 10^{6.97\pm 0.13}\; M_{sun}$. An unresolved central co

Author
Xu, C. K.; Cao, C.; Lu, N.; Gao, Y.; Van Der Werf, P.; Evans, A. S.; Mazzarella, J. M.; Chu, J.; Haan, S.; Diaz-Santos, T.; Meijerink, R.; Zhao, Y. -H.; Appleton, P.; Armus, L.; Charmandaris, V.; Lord, S.; Murphy, E. J.; Sanders, D. B.; Schulz, B.; Stierwalt, S.
Published
2014
Language
EN

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