SIMBAD references

2016ApJ...819...69Z - Astrophys. J., 819, 69 (2016/March-1)

The [NII] 205 µm emission in local luminous infrared galaxies.

ZHAO Y., LU N., XU C.K., GAO Y., LORD S.D., CHARMANDARIS V., DIAZ-SANTOS T., EVANS A., HOWELL J., PETRIC A.O., VAN DER WERF P.P. and SANDERS D.B.

Abstract (from CDS):

In this paper, we present the measurements of the [N II] 205 µm line for a flux-limited sample of 122 (ultra-)luminous infrared galaxies [(U)LIRGs] and 20 additional normal galaxies, obtained with the Herschel Space Observatory (Herschel). We explore the far-infrared (FIR) color dependence of the [N II] 205 µm (L_[N II]205 µm_) to the total infrared (LIR) luminosity ratio, and find that L_[N II]205 µm/LIR_ only depends modestly on the 70-160 µm flux density ratio (f70/f160) when f70/f160≲0.6, whereas such dependence becomes much steeper for f70/f160> 0.6. We also investigate the relation between L_[N II]205 µm_ and star formation rate (SFR), and show that L_[N II]205 µm_ has a nearly linear correlation with SFR, albeit the intercept of such a relation varies somewhat with f60/f100, consistent with our previous conclusion that [N II] 205 µm emission can serve as an SFR indicator with an accuracy of ∼0.4 dex, or ∼0.2 dex if f60/f100 is known independently. Furthermore, together with the Infrared Space Observatory measurements of [N II], we use a total of ∼200 galaxies to derive the local [N II] 205 µm luminosity function (LF) by tying it to the known IR LF with a bivariate method. As a practical application, we also compute the local SFR volume density ({dot}ρSFR) using the newly derived SFR calibrator and LF. The resulting log {dot}ρSFR=-1.96±0.11M yr–1 Mpc–3 agrees well with previous studies. Finally, we determine the electron densities (ne) of the ionized medium for a subsample of 12 (U)LIRGs with both [N II] 205 µm and [N II] 122 µm data, and find that ne is in the range of ∼1-100 cm–3, with a median value of 22 cm–3.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: ISM - galaxies: luminosity function, mass function - galaxies: starburst - infrared: ISM

VizieR on-line data: <Available at CDS (J/ApJ/819/69): table1.dat>

Simbad objects: 198

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2016ApJ...819...69Z and select 'bookmark this link' or equivalent in the popup menu


2020.10.22-11:51:08

© Université de Strasbourg/CNRS

    • Contact