Extending the infrared radio correlation

Boyle, B. J.; Cornwell, T. J.; Middelberg, E.; Norris, R. P.; Appleton, P. N.; Smail, Ian

doi:10.1111/j.1365-2966.2007.11509.x

Cited by 55 publications

(131 citation statements)

References 27 publications

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“…The IRAC non-detection therefore suggests S283 is a radio-loud AGN at z > 1. This is supported by the galaxy's MIR-radio correlation, q = log(S 24 μm /S 1.4 GHz ) < −0.46, which is well in the range expected for radio-loud AGNs (e.g., Boyle et al 2007). …”

Section: S283supporting

confidence: 64%

EVIDENCE FOR INFRARED-FAINT RADIO SOURCES ASz> 1 RADIO-LOUD ACTIVE GALACTIC NUCLEI

Huynh¹,

Norris²,

Siana³

et al. 2010

ApJ

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Infrared-Faint Radio Sources (IFRSs) are a class of radio objects found in the Australia Telescope Large Area Survey which have no observable mid-infrared counterpart in the Spitzer Wide-area Infrared Extragalactic (SWIRE) survey. The extended Chandra Deep Field South now has even deeper Spitzer imaging (3.6-70 μm) from a number of Legacy surveys. We report the detections of two IFRS sources in IRAC images. The nondetection of two other IFRSs allows us to constrain the source type. Detailed modeling of the spectral energy distribution of these objects shows that they are consistent with high-redshift (z 1) active galactic nuclei.

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Section: S283supporting

confidence: 64%

EVIDENCE FOR INFRARED-FAINT RADIO SOURCES ASz> 1 RADIO-LOUD ACTIVE GALACTIC NUCLEI

Huynh¹,

Norris²,

Siana³

et al. 2010

ApJ

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“…Spitzer's sensitivity permits this ratio to be measured at higher redshifts and to be explored in spatial detail within nearby galaxies, both pursuits aimed at more insight into its origins. The correlation holds with its local value out to the redshifts z ∼ 1 based on using 8-and 24-μm fluxes to estimate far-IR luminosity ), but may start deviating toward IR excess for fainter, submilli-Jansky 24-μm sources (Boyle et al 2007). Murphy et al (2006a) demonstrated that the radio images of disk galaxies are best described as smeared versions of the IR images, with the smearing scale length reflecting the spread of cosmic ray electrons from star-forming regions where they are first accelerated.…”

Section: Other Molecular Tracers In Ulirgsmentioning

confidence: 80%

The Spitzer View of the Extragalactic Universe

Soifer

Hélou

Werner

2008

Annu. Rev. Astron. Astrophys.

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The Spitzer Space Telescope was launched in August 2003. Scientists from around the world have applied its orders-of-magnitude gain in imaging and spectroscopic capability to a wide array of topics in extragalactic research. Spitzer studies have found massive galaxies at redshifts greater than 6, resolved the cosmic background at 200 μm > λ > 20 μm into the dusty infraredluminous galaxies that comprise it, directly detected dust-enshrouded star formation, and measured the star formation history of the universe to z > 3. In this review we examine a small fraction of the extragalactic studies from Spitzer that have been conducted in its first three years of operations.

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“…The radio-infrared relation (van der Kruit 1971;Harwit & Pacini 1975;Dickey & Salpeter 1984;de Jong et al 1985;Condon 1992;Yun et al 2001;Boyle et al 2007) is one of the tightest correlations known in astronomy and offers the possibility of deriving SFRs directly from measured radio luminosities, modulo contamination from radio emission due to nuclear activity. The correlation relates the infrared emission from thermal re-radiation of starlight by dust in star-forming regions to the nonthermal synchrotron radiation from relativistic particles A99, page 18 of 53 accelerated by supernova explosions (Harwit & Pacini 1975;Condon 1992).…”

Section: Radio Continuum and Sfrsmentioning

confidence: 99%

The DiskMass Survey

Martinsson

Verheijen

Bershady³

et al. 2015

A&A

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We present results from 21 cm radio synthesis imaging of 28 spiral galaxies from the DiskMass Survey obtained with the VLA, WSRT, and GMRT facilities. We detail the observations and data reduction procedures and present a brief analysis of the radio data. We construct 21 cm continuum images, global Hi emission-line profiles, column-density maps, velocity fields, and position-velocity diagrams. From these we determine star formation rates (SFRs), Hi line widths, total Hi masses, rotation curves, and azimuthallyaveraged radial Hi column-density profiles. All galaxies have an Hi disk that extends beyond the readily observable stellar disk, with an average ratio and scatter of R HI /R 25 = 1.35±0.22, and a majority of the galaxies appear to have a warped Hi disk. A tight correlation exists between total Hi mass and Hi diameter, with the largest disks having a slightly lower average column density. Galaxies with relatively large Hi disks tend to exhibit an enhanced stellar velocity dispersion at larger radii, suggesting the influence of the gas disk on the stellar dynamics in the outer regions of disk galaxies. We find a striking similarity among the radial Hi surface density profiles, where the average, normalized radial profile of the late-type spirals is described surprisingly well with a Gaussian profile. These results can be used to estimate Hi surface density profiles in galaxies that only have a total Hi flux measurement. We compare our 21 cm radio continuum luminosities with 60 μm luminosities from IRAS observations for a subsample of 15 galaxies and find that these follow a tight radio-infrared relation, with a hint of a deviation from this relation at low luminosities. We also find a strong correlation between the average SFR surface density and the K-band surface brightness of the stellar disk.

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Extending the infrared radio correlation

Cited by 55 publications

References 27 publications

EVIDENCE FOR INFRARED-FAINT RADIO SOURCES ASz> 1 RADIO-LOUD ACTIVE GALACTIC NUCLEI

EVIDENCE FOR INFRARED-FAINT RADIO SOURCES ASz> 1 RADIO-LOUD ACTIVE GALACTIC NUCLEI

The Spitzer View of the Extragalactic Universe

The DiskMass Survey

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