NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-17 T04:16:49 PDT
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For refcode 2015ApJ...799...11X:
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2015ApJ...799...11X ALMA Observations of Warm Dense Gas in NGC 1614---Breaking of the Star Formation Law in the Central Kiloparsec Xu, C. K.; Cao, C.; Lu, N.; Gao, Y.; Diaz-Santos, T.; Herrero-Illana, R.; Meijerink, R.; Privon, G.; Zhao, Y.-H.; Evans, A. S.; Konig, S.; Mazzarella, J. M.; Aalto, S.; Appleton, P.; Armus, L.; Charmandaris, V.; Chu, J.; Haan, S.; Inami, H.; Murphy, E. J.; Sanders, D. B.; Schulz, B.; van der Werf, P. Abstract. We present ALMA Cycle-0 observations of the CO (6-5) line emission and of the 435 micron dust continuum emission in the central kiloparsec of NGC 1614, a local luminous infrared galaxy at a distance of 67.8 Mpc (1{"}= 329 pc). The CO emission is well resolved by the ALMA beam (0."26 x 0."20) into a circumnuclear ring, with an integrated flux of f_ CO(6-5)_ = 898 (+/- 153) Jy km s^-1^, which is 63(+/- 12)% of the total CO (6-5) flux measured by Herschel. The molecular ring, located between 100<br/> pc < r < 350 pc from the nucleus, looks clumpy and includes seven unresolved (or marginally resolved) knots with median velocity dispersion of ~40 km s^-1^. These knots are associated with strong star formation regions with Sigma_SFR_ ~ 100 M_sun_ yr^-1^ kpc^-2^ and Sigma_Gas_~ 10^4^ {M}_sun pc^-2^. The non-detections of the nucleus in both the CO (6-5) line emission and the 435 micron continuum rule out, with relatively high confidence, a Compton-thick active galactic nucleus in NGC 1614. Comparisons with radio continuum emission show a strong deviation from an expected local correlation between Sigma_Gas_ and Sigma_SFR_, indicating a breakdown of the Kennicutt-Schmidt law on the linear scale of ~100 pc. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Key words: galaxies: active, galaxies: evolution, galaxies: general, galaxies: interactions, galaxies: ISM, galaxies: nuclei, galaxies: magnetic fields, galaxies: starburst, submillimeter: galaxies
Retrieve 9 NED objects in this reference.
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