Low-frequency radio continuum imaging and SED modeling of 11 LIRGs : radio-only and FUV to radio bands

2022
journal article
article
6
dc.abstract.enWe present a detailed analysis of 11 local luminous infrared galaxies from ultraviolet through far-infrared to radio (∼70 MHz to ∼15 GHz) bands. We derive the astrophysical properties through spectral energy distribution (SED) modeling using the Code Investigating GALaxy Emission (CIGALE) and UltraNest codes. The radio SEDs include our new observations at 325 and 610 MHz from the GMRT and the measurements from public archives. Our main results are (1) radio SEDs show turnovers and bends, (2) the synchrotron spectral index of the fitted radio spectra ranges between −0.5 and −1.7, and (3) the infrared luminosity, dust mass, dust temperature, stellar mass, star formation rates (SFRs), and active galactic nuclei (AGN) fraction obtained from CIGALE fall within the range exhibited by galaxies of the same class. The ratio of 60 μm infrared and 1.4 GHz radio luminosity, the 1.4 GHz thermal fraction, and emission measure range between 2.1 and 2.9, 0.1% and 10%, 0.02 and 269.5 $\times$ 10$^{6}$ cm$^{-6}$ pc, respectively. We conclude that the turnovers seen in the radio SEDs are due to free–free absorption; this is supported by the low AGN fraction derived from the CIGALE analysis. The decomposed 1.4 GHz thermal and nonthermal radio luminosities allowed us to compute the SFR using scaling relations. A positive correlation is observed between the SFR$_{IR}$ obtained 10 Myr ago (compared to 100 Myr ago) and 1.4 GHz radio (total and nonthermal) because similar synchrotron lifetimes are expected for typical magnetic field strengths observed in these galaxies (≈50 μG).pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomicznepl
dc.contributor.authorDey, Subhrata - 383663 pl
dc.contributor.authorGoyal, Arti - 348612 pl
dc.contributor.authorMałek, Katarzynapl
dc.contributor.authorGalvin, Timothy J.pl
dc.contributor.authorSeymour, Nicholaspl
dc.contributor.authorSantos, Tanio Díazpl
dc.contributor.authorPiotrowska, Julia - 360463 pl
dc.contributor.authorCharmandaris, Vassilispl
dc.date.accessioned2022-11-07T09:39:49Z
dc.date.available2022-11-07T09:39:49Z
dc.date.issued2022pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.number2pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume938pl
dc.identifier.articleid152pl
dc.identifier.doi10.3847/1538-4357/ac82f2pl
dc.identifier.eissn1538-4357pl
dc.identifier.issn0004-637Xpl
dc.identifier.urihttps://ruj.uj.edu.pl/xmlui/handle/item/303317
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl*
dc.share.typeotwarte czasopismo
dc.subject.enradio continuum emissionpl
dc.subject.enluminous infrared galaxiespl
dc.subject.enspectral energy distributionpl
dc.subject.eninterstellar mediumpl
dc.subject.engalaxy photometrypl
dc.subtypeArticlepl
dc.titleLow-frequency radio continuum imaging and SED modeling of 11 LIRGs : radio-only and FUV to radio bandspl
dc.title.journalThe Astrophysical Journalpl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
We present a detailed analysis of 11 local luminous infrared galaxies from ultraviolet through far-infrared to radio (∼70 MHz to ∼15 GHz) bands. We derive the astrophysical properties through spectral energy distribution (SED) modeling using the Code Investigating GALaxy Emission (CIGALE) and UltraNest codes. The radio SEDs include our new observations at 325 and 610 MHz from the GMRT and the measurements from public archives. Our main results are (1) radio SEDs show turnovers and bends, (2) the synchrotron spectral index of the fitted radio spectra ranges between −0.5 and −1.7, and (3) the infrared luminosity, dust mass, dust temperature, stellar mass, star formation rates (SFRs), and active galactic nuclei (AGN) fraction obtained from CIGALE fall within the range exhibited by galaxies of the same class. The ratio of 60 μm infrared and 1.4 GHz radio luminosity, the 1.4 GHz thermal fraction, and emission measure range between 2.1 and 2.9, 0.1% and 10%, 0.02 and 269.5 $\times$ 10$^{6}$ cm$^{-6}$ pc, respectively. We conclude that the turnovers seen in the radio SEDs are due to free–free absorption; this is supported by the low AGN fraction derived from the CIGALE analysis. The decomposed 1.4 GHz thermal and nonthermal radio luminosities allowed us to compute the SFR using scaling relations. A positive correlation is observed between the SFR$_{IR}$ obtained 10 Myr ago (compared to 100 Myr ago) and 1.4 GHz radio (total and nonthermal) because similar synchrotron lifetimes are expected for typical magnetic field strengths observed in these galaxies (≈50 μG).
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne
dc.contributor.authorpl
Dey, Subhrata - 383663
dc.contributor.authorpl
Goyal, Arti - 348612
dc.contributor.authorpl
Małek, Katarzyna
dc.contributor.authorpl
Galvin, Timothy J.
dc.contributor.authorpl
Seymour, Nicholas
dc.contributor.authorpl
Santos, Tanio Díaz
dc.contributor.authorpl
Piotrowska, Julia - 360463
dc.contributor.authorpl
Charmandaris, Vassilis
dc.date.accessioned
2022-11-07T09:39:49Z
dc.date.available
2022-11-07T09:39:49Z
dc.date.issuedpl
2022
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.numberpl
2
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
938
dc.identifier.articleidpl
152
dc.identifier.doipl
10.3847/1538-4357/ac82f2
dc.identifier.eissnpl
1538-4357
dc.identifier.issnpl
0004-637X
dc.identifier.uri
https://ruj.uj.edu.pl/xmlui/handle/item/303317
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licence
CC-BY
dc.rights.uri*
http://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.type
otwarte czasopismo
dc.subject.enpl
radio continuum emission
dc.subject.enpl
luminous infrared galaxies
dc.subject.enpl
spectral energy distribution
dc.subject.enpl
interstellar medium
dc.subject.enpl
galaxy photometry
dc.subtypepl
Article
dc.titlepl
Low-frequency radio continuum imaging and SED modeling of 11 LIRGs : radio-only and FUV to radio bands
dc.title.journalpl
The Astrophysical Journal
dc.typepl
JournalArticle
dspace.entity.type
Publication

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