THE CALIBRATION OF STAR FORMATION RATE INDICATORS FOR<i>WISE</i>22 μm-SELECTED GALAXIES IN THE SLOAN DIGITAL SKY SURVEY

Lee, Jong Chul; Hwang, Ho Seong; Ko, Jongwan

doi:10.1088/0004-637x/774/1/62

Cited by 84 publications

(100 citation statements)

References 68 publications

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“…There may be a small systematic offset between SFR IR and SFR SDSS (by ∼0.3-dex level), as reported by some recent studies (e.g. Lee et al 2013), but the results presented in this study based on relative comparison between different environments is not affected.…”

Section: The Final Samplesupporting

confidence: 70%

A Universal Correlation between Star Formation Activity and Molecular Gas Properties Across Environments

Koyama¹,

Koyama²,

Yamashita³

et al. 2017

ApJ

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We present the molecular gas mass fraction (f H2 ) and star-formation efficiency (SFE) of local galaxies on the basis of our new CO(J = 1 − 0) observations with the Nobeyama 45m radio telescope, combined with the COLDGASS galaxy catalog, as a function of galaxy environment defined as the local number density of galaxies measured with SDSS DR7 spectroscopic data. Our sample covers a wide range in the stellar mass and SFR, and covers wide environmental range over two orders of magnitude. This allows us to conduct the first, systematic study of environmental dependence of molecular gas properties in galaxies from the lowest-to the highest-density environments in the local universe. We confirm that both f H2 and SFE have strong positive correlations with the SFR offset from the star-forming main sequence (∆MS), and most importantly, we find that these correlations are universal across all environments. Our result demonstrates that star-formation activity within individual galaxies is primarily controlled by their molecular gas content, regardless of their global environment. Therefore, we claim that one always needs to be careful about the ∆MS distribution of the sample when investigating the environmental effects on the H 2 gas content in galaxies.

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Section: The Final Samplesupporting

confidence: 70%

A Universal Correlation between Star Formation Activity and Molecular Gas Properties Across Environments

Koyama¹,

Koyama²,

Yamashita³

et al. 2017

ApJ

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“…Figures 9-12 show the Spitzer IRAC 8 μm, WISE W3 (12 μm), WISE W4 (22.8 μm), and Spitzer MIPS 24 μm bands, respectively. In all of the figures, gray lines denote the power-law fits taken from a subset of previous literature (Wu et al 2005;Relaño et al 2007;Zhu et al 2008;Kennicutt et al 2009;Jarrett et al 2013;Lee et al 2013;Cluver et al 2014;Catalán-Torrecilla et al 2015;Davies et al 2016).…”

Section: Mid-infraredmentioning

confidence: 99%

Calibration of Ultraviolet, Mid-infrared, and Radio Star Formation Rate Indicators

Brown

Moustakas

Kennicutt

et al. 2017

ApJ

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We present calibrations for star formation rate (SFR) indicators in the ultraviolet, mid-infrared, and radiocontinuum bands, including one of the first direct calibrations of 150 MHz as an SFR indicator. Our calibrations utilize 66 nearby star-forming galaxies with Balmer-decrement-corrected Ha luminosities, which span five orders of magnitude in SFR and have absolute magnitudes of M 24 12 r -< < -. Most of our photometry and spectrophotometry are measured from the same region of each galaxy, and our spectrophotometry has been validated with SDSS photometry, so our random and systematic errors are small relative to the intrinsic scatter seen in SFR indicator calibrations. We find that the Wide-field Infrared Space Explorer W4 (22.8 μm), Spitzer24 μm, and 1.4 GHz bands have tight correlations with the Balmer-decrement-corrected Hα luminosity, with a scatter of only 0.2dex. Our calibrations are comparable to those from the prior literature for L * galaxies, but for dwarf galaxies, our calibrations can give SFRs that are far greater than those derived from most previous literature.

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“…Emission in the 22 or 24 µm bands is well-correlated with other star formation tracers (e.g. Calzetti et al 2005Calzetti et al , 2007Prescott et al 2007;Bendo et al 2015a), and multiple relations have been derived for converting the flux densities in these bands to SFRs, as reviewed by Calzetti et al (2010) and Lee et al (2013). Moreover, the spatial resolution of the Spitzer 24 µm and WISE 22 µm data make it easier to separate emission from the central source and the extended disc, whereas this is not as easily done in longer wavelength data from Spitzer or Herschel .…”

Section: Infrared Datamentioning

confidence: 99%

Free–free and H42α emission from the dusty starburst within NGC 4945 as observed by ALMA

Bendo¹,

Henkel²,

D'Cruze³

et al. 2016

Mon. Not. R. Astron. Soc.

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We present observations of the 85.69 GHz continuum emission and H42α line emission from the central 30 arcsec within NGC 4945. Both sources of emission originate from nearly identical structures that can be modelled as exponential discs with a scale length of ∼2.1 arcsec (or ∼40 pc). An analysis of the spectral energy distribution based on combining these data with archival data imply that 84%±10% of the 85.69 GHz continuum emission originates from free-free emission. The electron temperature is 5400±600 K, which is comparable to what has been measured near the centre of the Milky Way Galaxy. The star formation rate (SFR) based on the H42α and 85.69 GHz free-free emission (and using a distance of 3.8 Mpc) is 4.35±0.25 M ⊙ yr −1 . This is consistent with the SFR from the total infrared flux and with previous measurements based on recombination line emission, and it is within a factor of ∼2 of SFRs derived from radio data. The Spitzer Space Telescope 24 µm data and Wide-field Infrared Survey Explorer 22 µm data yield SFRs ∼10× lower than the ALMA measurements, most likely because the mid-infrared data are strongly affected by dust attenuation equivalent to A V = 150. These results indicate that SFRs based on mid-infrared emission may be highly inaccurate for dusty, compact circumnuclear starbursts.

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THE CALIBRATION OF STAR FORMATION RATE INDICATORS FORWISE22 μm-SELECTED GALAXIES IN THE SLOAN DIGITAL SKY SURVEY

Cited by 84 publications

References 68 publications

A Universal Correlation between Star Formation Activity and Molecular Gas Properties Across Environments

A Universal Correlation between Star Formation Activity and Molecular Gas Properties Across Environments

Calibration of Ultraviolet, Mid-infrared, and Radio Star Formation Rate Indicators

Free–free and H42α emission from the dusty starburst within NGC 4945 as observed by ALMA

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