THE CALIBRATION OF MONOCHROMATIC FAR-INFRARED STAR FORMATION RATE INDICATORS

The four clumpy irregular galaxies Mkr 8, 296,297 and 325 have been observed by IRAS. All galaxies have been detected in at least two of the four detector bands. The ratios of the 100 to 60-m flux densities are comparable to those of HII regions or violently star forming galaxies. The average star formation rate in clumpy irregular galaxies is of the order of a few solar masses per year (based on their average far-infrared luminosity and a Hubble constant of 75 km s−1 Mpc−1.

Download Full-text

The HerMES Local Luminosity Function

Proceedings of the International Astronomical Union ◽

10.1017/s1743921316008140 ◽

2015 ◽

Vol 11 (S315) ◽

Author(s):

Lucia Marchetti ◽

Mattia Vaccari ◽

Alberto Franceschini

Keyword(s):

Star Formation ◽

Data Fusion ◽

Luminosity Function ◽

Star Formation Rate ◽

Formation Rate ◽

Accurate Determination ◽

Far Infrared ◽

Rate Function ◽

Model Predictions ◽

Multi Wavelength

AbstractWe exploit the Herschel Extragalactic Multi-Tiered Survey (HerMES) dataset along with ancillary multi-wavelength photometry and spectroscopy from the Spitzer Data Fusion to provide the most accurate determination to date of the local (0.02<z<0.5) Far-Infrared Luminosity and Star Formation Rate Function. We present and compare our results with model predictions as well as other multi-wavelength estimates of the local star formation rate density.

Download Full-text

A correlation between star formation rate and average black hole accretion rate in star forming galaxies

Proceedings of the International Astronomical Union ◽

10.1017/s1743921314004128 ◽

2013 ◽

Vol 9 (S304) ◽

pp. 302-306

Author(s):

Chien-Ting J. Chen ◽

Ryan C. Hickox

Keyword(s):

Star Formation ◽

Galaxy Evolution ◽

Star Formation Rate ◽

Accretion Rate ◽

Formation Rate ◽

Far Infrared ◽

Host Galaxies ◽

Star Forming ◽

Black Hole Accretion ◽

Strong Linear Correlation

AbstractWe present the results of recent studies on the co-evolution of galaxies and the supermassive black holes (SMBHs) using Herschel far-infrared and Chandra X-ray observations in the Boötes survey region. For a sample of star-forming (SF) galaxies, we find a strong correlation between galactic star formation rate and the average SMBH accretion rate in SF galaxies. Recent studies have shown that star formation and AGN accretion are only weakly correlated for individual AGN, but this may be due to the short variability timescale of AGN relative to star formation. Averaging over the full AGN population yields a strong linear correlation between accretion and star formation, consistent with a simple picture in which the growth of SMBHs and their host galaxies are closely linked over galaxy evolution time scales.

Download Full-text

A Comparative Study of Mid-infrared Star Formation Rate Tracers and Their Metallicity Dependence

The Astrophysical Journal ◽

10.3847/1538-4357/abaef6 ◽

2020 ◽

Vol 901 (1) ◽

pp. 47

Author(s):

C. M. Whitcomb ◽

K. Sandstrom ◽

E. J. Murphy ◽

S. Linden

Keyword(s):

Star Formation ◽

Comparative Study ◽

Star Formation Rate ◽

Formation Rate ◽

Mid Infrared ◽

Infrared Star

Download Full-text

CONTINUOUS MID-INFRARED STAR FORMATION RATE INDICATORS: DIAGNOSTICS FOR 0

The Astrophysical Journal ◽

10.1088/0004-637x/800/2/143 ◽

2015 ◽

Vol 800 (2) ◽

pp. 143 ◽

Cited By ~ 12

Author(s):

A. J. Battisti ◽

D. Calzetti ◽

B. D. Johnson ◽

D. Elbaz

Keyword(s):

Star Formation ◽

Star Formation Rate ◽

Formation Rate ◽

Mid Infrared ◽

Star Forming ◽

Infrared Star

Download Full-text

The bivariate luminosity and mass functions of the local HRS galaxy sample

Astronomy and Astrophysics ◽

10.1051/0004-6361/201832873 ◽

2018 ◽

Vol 617 ◽

pp. A33 ◽

Cited By ~ 7

Author(s):

P. Andreani ◽

A. Boselli ◽

L. Ciesla ◽

R. Vio ◽

L. Cortese ◽

...

Keyword(s):

Statistical Analysis ◽

Star Formation ◽

Star Formation Rate ◽

Formation Rate ◽

Far Infrared ◽

Mass Function ◽

Stellar Mass ◽

The Relationship ◽

Mass Functions ◽

Physical Quantities

Aims.We discuss the results of the relationships between theK-band and stellar mass, FIR luminosities, star formation rate, and the masses of the dust and gas of nearby galaxies computing the bivariateK-band-luminosity function (BLF) and bivariateK-band-mass function (BMF) of theHerschelReference Survey (HRS), a volume-limited sample with full wavelength coverage.Methods.We derive the BLFs and BMFs from theK-band and stellar mass, FIR luminosities, star formation rate, dust and gas masses cumulative distributions using a copula method, which is outlined in detail. The use of the computed bivariate taking into account the upper limits allows us to derive a more solid statistical ground for the relationship between the observed physical quantities.Results.The analysis shows that the behaviour of the morphological (optically selected) subsamples is quite different. A statistically meaningful result can be obtained over the whole HRS sample only from the relationship between theK-band and the stellar mass, while for the remaining physical quantities (dust and gas masses, far-infrared luminosity, and star formation rate), the analysis is distinct for late-type (LT) and early-type galaxies (ETG). However, the number of ETGs is small to perform a robust statistical analysis, and in most of the case results are discussed only for the LTG subsample. The luminosity and mass functions (LFs, MFs) of LTGs are generally dependent on theK-band and the various dependencies are discussed in detail. We are able to derive the corresponding LFs and MFs and compare them with those computed with other samples. Our statistical analysis allows us to characterise the HRS which, although non-homogeneously selected and partially biased towards low IR luminosities, may be considered as representative of the local LT galaxy population.

Download Full-text

Continuous Mid-Infrared Star Formation Rate Indicators

Proceedings of the International Astronomical Union ◽

10.1017/s1743921314009582 ◽

2014 ◽

Vol 10 (S309) ◽

pp. 167-168

Author(s):

A. J. Battisti ◽

D. Calzetti ◽

B. D. Johnson ◽

D. Elbaz

Keyword(s):

Star Formation ◽

Star Formation Rate ◽

Formation Rate ◽

Flexible Tool ◽

Mid Infrared ◽

Infrared Wavelength ◽

Star Forming ◽

James Webb Space Telescope ◽

Multi Wavelength ◽

Infrared Star

AbstractWe present continuous, monochromatic star formation rate (SFR) indicators over the mid-infrared wavelength range of 6–70 μm. We use a sample of 58 star forming galaxies (SFGs) in the Spitzer-SDSS-GALEX Spectroscopic Survey (SSGSS) at z<0.2, for which there is a rich suite of multi-wavelength photometry and spectroscopy from the ultraviolet through to the infrared. The data from the Spitzer infrared spectrograph (IRS) of these galaxies, which spans 5–40 μm, is anchored to their photometric counterparts. The spectral region between 40-70 μm is interpolated using dust model fits to the IRS spectrum anchored by Spitzer 70 and 160 μm photometry. Since there are no sharp spectral features in this region, we expect these interpolations to be robust. This spectral range is calibrated as a SFR diagnostic using several reference SFR indicators to mitigate potential bias. Our band-specific continuous SFR indicators are found to be consistent with monochromatic calibrations in the local universe, as derived from Spitzer, WISE, and Herschel photometry. Additionally, in the era of the James Webb Space Telescope this will become a flexible tool, applicable to any SFG up to z∼3.

Download Full-text

A LOFAR-IRAS cross-match study: the far-infrared radio correlation and the 150 MHz luminosity as a star-formation rate tracer

Astronomy and Astrophysics ◽

10.1051/0004-6361/201935913 ◽

2019 ◽

Vol 631 ◽

pp. A109 ◽

Cited By ~ 2

Author(s):

L. Wang ◽

F. Gao ◽

K. J. Duncan ◽

W. L. Williams ◽

M. Rowan-Robinson ◽

...

Keyword(s):

Star Formation ◽

Rest Frame ◽

Star Formation Rate ◽

Formation Rate ◽

Value Added ◽

Far Infrared ◽

Star Forming ◽

Dust Extinction ◽

Best Fit ◽

Cross Match

Aims. We aim to study the far-infrared radio correlation (FIRC) at 150 MHz in the local Universe (at a median redshift ⟨z⟩∼0.05) and improve the use of the rest-frame 150 MHz luminosity, L150, as a star-formation rate (SFR) tracer, which is unaffected by dust extinction. Methods. We cross-match the 60 μm selected Revised IRAS Faint Source Survey Redshift (RIFSCz) catalogue and the 150 MHz selected LOFAR value-added source catalogue in the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Spring Field. We estimate L150 for the cross-matched sources and compare it with the total infrared (IR) luminosity, LIR, and various SFR tracers. Results. We find a tight linear correlation between log L150 and log LIR for star-forming galaxies, with a slope of 1.37. The median qIR value (defined as the logarithm of the LIR to L150 ratio) and its rms scatter of our main sample are 2.14 and 0.34, respectively. We also find that log L150 correlates tightly with the logarithm of SFR derived from three different tracers, i.e., SFRHα based on the Hα line luminosity, SFR60 based on the rest-frame 60 μm luminosity and SFRIR based on LIR, with a scatter of 0.3 dex. Our best-fit relations between L150 and these SFR tracers are, log L150 (L⊙) = 1.35(±0.06) × log SFRHα (M⊙ yr−1) + 3.20(±0.06), log L150 (L⊙) = 1.31(±0.05) × log SFR60 (M⊙ yr−1) + 3.14(±0.06), and log L150 (L⊙) = 1.37 (±0.05) × log SFRIR (M⊙ yr−1) + 3.09(±0.05), which show excellent agreement with each other.

Download Full-text

High-resolution, 3D radiative transfer modelling

Astronomy and Astrophysics ◽

10.1051/0004-6361/201936176 ◽

2020 ◽

Vol 637 ◽

pp. A25 ◽

Cited By ~ 8

Author(s):

Angelos Nersesian ◽

Sam Verstocken ◽

Sébastien Viaene ◽

Maarten Baes ◽

Emmanuel M. Xilouris ◽

...

Keyword(s):

Star Formation ◽

Radiative Transfer ◽

Star Formation Rate ◽

Formation Rate ◽

Far Infrared ◽

Stellar Populations ◽

Barred Galaxies ◽

Bolometric Luminosity ◽

Radial Profiles ◽

Galaxy Sample

Context. Dust in late-type galaxies in the local Universe is responsible for absorbing approximately one third of the energy emitted by stars. It is often assumed that dust heating is mainly attributable to the absorption of ultraviolet and optical photons emitted by the youngest (≤100 Myr) stars. Consequently, thermal re-emission by dust at far-infrared wavelengths is often linked to the star-formation activity of a galaxy. However, several studies argue that the contribution to dust heating by much older stellar populations might be more significant than previously thought. Advances in radiation transfer simulations finally allow us to actually quantify the heating mechanisms of diffuse dust by the stellar radiation field. Aims. As one of the main goals in the DustPedia project, we have developed a framework to construct detailed 3D stellar and dust radiative transfer models for nearby galaxies. In this study, we analyse the contribution of the different stellar populations to the dust heating in four nearby face-on barred galaxies: NGC 1365, M 83, M 95, and M 100. We aim to quantify the fraction directly related to young stellar populations, both globally and on local scales, and to assess the influence of the bar on the heating fraction. Methods. From 2D images we derive the 3D distributions of stars and dust. To model the complex geometries, we used SKIRT, a state-of-the-art 3D Monte Carlo radiative transfer code designed to self-consistently simulate the absorption, scattering, and thermal re-emission by the dust for arbitrary 3D distributions. Results. We derive global attenuation laws for each galaxy and confirm that galaxies of high specific star-formation rate have shallower attenuation curves and weaker UV bumps. On average, 36.5% of the bolometric luminosity is absorbed by dust in our galaxy sample. We report a clear effect of the bar structure on the radial profiles of the dust-heating fraction by the young stellar populations, and the dust temperature. We find that the young stellar populations are the main contributors to the dust heating, donating, on average ∼59% of their luminosity to this purpose throughout the galaxy. This dust-heating fraction drops to ∼53% in the bar region and ∼38% in the bulge region where the old stars are the dominant contributors to the dust heating. We also find a strong link between the heating fraction by the young stellar populations and the specific star-formation rate.

Download Full-text

AKARI/IRC broadband mid-infrared data as an indicator of the Star Formation Rate

Proceedings of the International Astronomical Union ◽

10.1017/s1743921312009416 ◽

2011 ◽

Vol 7 (S284) ◽

pp. 357-359

Author(s):

Fang-Ting Yuan ◽

Tsutomu T. Takeuchi ◽

Véronique Buat ◽

Sébastien Heinis ◽

Elodie Giovannoli ◽

...

Keyword(s):

Star Formation ◽

Star Formation Rate ◽

Formation Rate ◽

Infrared Camera ◽

Far Infrared ◽

Mid Infrared ◽

Extended Sources ◽

Nearby Galaxies ◽

First Time ◽

Infrared Data

AbstractWith the goal of constructing Star-Formation Rates (SFR) from AKARI Infrared Camera (IRC) data, we analyzed an IR-selected GALEX-SDSS-2MASS-AKARI(IRC & Far-Infrared Surveyor) sample of 153 nearby galaxies. The far-infrared fluxes were obtained from AKARI diffuse maps to correct the underestimation for extended sources raised by PSF photometry. SFRs of these galaxies were derived using the SED fitting program CIGALE. In spite of complicated features contained in these bands, both the S9W and L18W emissions correlate with the SFR of galaxies. The SFR calibrations using S9W and L18W are presented for the first time. These calibrations agree well with previous work based on Spitzer data within the scatter, and should be applicable to dust-rich galaxies.

Download Full-text