SIMBAD references

2015ApJ...799...11X - Astrophys. J., 799, 11 (2015/January-3)

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. and VAN DER WERF P.

Abstract (from CDS):

We present ALMA Cycle-0 observations of the CO (6-5) line emission and of the 435 µm dust continuum emission in the central kiloparsec of NGC 1614, a local luminous infrared galaxy at a distance of 67.8 Mpc (1" = 329pc). The CO emission is well resolved by the ALMA beam (0.''26x0.''20) into a circumnuclear ring, with an integrated flux of fCO(6–5)= 898 (± 153) Jy km/s, which is 63(± 12)% of the total CO (6-5) flux measured by Herschel. The molecular ring, located between 100pc < r < 350pc from the nucleus, looks clumpy and includes seven unresolved (or marginally resolved) knots with median velocity dispersion of ∼40 km/s. These knots are associated with strong star formation regions with ΣSFR∼ 100 M/yr/kpc2 and ΣGas ∼ 104M/pc2. The non-detections of the nucleus in both the CO (6-5) line emission and the 435 µm 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 ΣGas and ΣSFR, indicating a breakdown of the Kennicutt-Schmidt law on the linear scale of ∼100 pc.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: general - galaxies: interactions - galaxies: ISM - galaxies: nuclei - galaxies: magnetic fields - galaxies: starburst - submillimeter: galaxies

Simbad objects: 13

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