J/A+A/658/A21 Infrared-radio relation in the local universe (Tisanic+, 2022)
Infrared-radio relation in the local universe.
Tisanic K., De Zotti G., Amiri A., Khoram A., Tavasoli S.,
Vidovic-Tisanic Z.
<Astron. Astrophys. 658, A21 (2022)>
=2022A&A...658A..21T 2022A&A...658A..21T (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radio ; Galaxies, IR
Keywords: galaxies: statistics - radio continuum: galaxies
Abstract:
The Square Kilometer Array (SKA) is expected to detect high-redshift
galaxies with star formation rates (SFRs) up to two orders of
magnitude lower than Herschel surveys and will thus boost the ability
of radio astronomy to study extragalactic sources. The tight
infrared-radio correlation offers the possibility of using radio
emission as a dust-unobscured star formation diagnostic. However, the
physics governing the link between radio emission and star formation
is poorly understood, and recent studies have pointed to differences
in the exact calibration required when radio is to be used as a star
formation tracer. We improve the calibration of the relation of the
local radio luminosity-SFR and to test whether there are
nonlinearities in it. We used a sample of Herschel Astrophysical
Terahertz Large Area Survey (H-ATLAS) sources and investigated their
radio luminosity, which was derived using the NRAO VLA Sky Survey
(NVSS) and Faint Images of the Radio Sky at Twenty-cm (FIRST) maps. We
stacked the bins of infrared luminosity and SFR and accounted for bins
with no detections in the stacked images using survival analysis
fitting. This approach was tested using Monte Carlo simulations. After
removing sources from the sample that have excess radio emission,
which is indicative of nuclear radio activity, we found no deviations
from linearity of the mean relations between radio luminosity and
either SFR or infrared luminosity.
We analyzed the link between radio emission and SFR or infrared
luminosity using a local sample of star-forming galaxies without
evidence of nuclear radio activity and found no deviations from
linearity, although our data are also consistent with the small
nonlinearity reported by some recent analyses. The normalizations of
these relations are intermediate between those reported by earlier
works.
Description:
The table lists the computed radio and infrared luminosities, rounded
to two decimal places.
The different binning strategies (infrared luminosity and SFR
binning), the stacked radio map used (NVSS or FIRST), as well as the
radio detection limit (5 sigma or 3 sigma) are shown as separate
columns. The column 'l_logL1.4' marks L1.4 detections as 1, and
upper limits as 0.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
kt.dat 39 238 Computed radio and infrared luminosities,
rounded to two decimal places
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See also:
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)
J/ApJS/236/30 : Herschel-ATLAS (H-ATLAS) DR2 (Maddox+, 2018)
Byte-by-byte Description of file: kt.dat
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Bytes Format Units Label Explanations
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1- 5 F5.2 [Lsun] logLIR Median log infrared luminosity
7- 11 F5.2 [W/Hz] logL1.4 Median-stacked log radio luminosity
13- 17 F5.2 [Msun/yr] logSFR Median log SFR
19- 21 A3 --- Bin Indicates whether LIR or SFR binning was used
23- 27 A5 --- Map [FIRST/NVSS ] Map used for stacking
29- 35 A7 --- Sample [H-ATLAS/SFG ] Binned sample
37 I1 --- sigma [3/5] Detection threshold for computing
radio luminosity
39 I1 --- l_logL1.4 [0/1] Marks whether logL1.4 is a
detection (1) or an upper limit (0)
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Acknowledgements:
Kresimir Tisanic, ktisanic(at)irb.hr
(End) Patricia Vannier [CDS] 09-Nov-2021