Extinction Maps and Dust-to-Gas Ratios in Nearby Galaxies

@inproceedings{Kahre2018ExtinctionMA,
  title={Extinction Maps and Dust-to-Gas Ratios in Nearby Galaxies},
  author={L. Kahre and R. Walterbos and H. Kim and D. Thilker and D. Calzetti and J. Lee and E. Sabbi and L. {\'U}beda and A. Aloisi and M. Cignoni and D. Cook and D. Dale and B. Elmegreen and D. Elmegreen and M. Fumagalli and J. Gallagher and D. Gouliermis and K. Grasha and E. Grebel and D. Hunter and E. Sacchi and L. Smith and M. Tosi and A. Adamo and J. Andrews and G. Ashworth and S. N. Bright and T. Brown and R. Chandar and C. Christian and S. D. Mink and C. Dobbs and A. Evans and A. Herrero and K. Johnson and R. Kennicutt and M. Krumholz and M. Messa and P. Nair and A. Nota and A. Pellerin and J. Ryon and D. Schaerer and F. Shabani and S. V. Dyk and B. Whitmore and A. Wofford},
  year={2018}
}
We present a study of the dust-to-gas ratios in five nearby galaxies NGC 628 (M74), NGC 6503, NGC 7793, UGC 5139 (Holmberg I), and UGC 4305 (Holmberg II). Using Hubble Space Telescope broad band WFC3/UVIS UV and optical images from the Treasury program LEGUS (Legacy ExtraGalactic UV Survey) combined with archival HST/ACS data, we correct thousands of individual stars for extinction across these five galaxies using an isochrone-matching (reddening-free Q) method. We generate extinction maps for… Expand
Dirt-cheap Gas Scaling Relations: Using Dust Absorption, Metallicity, and Galaxy Size to Predict Gas Masses for Large Samples of Galaxies
We apply novel survival analysis techniques to investigate the relationship between a number of the properties of galaxies and their atomic (MHI) and molecular (MH2) gas mass, with the aim ofExpand
The Dust-to-Gas and Dust-to-Metals Ratio in Galaxies from z=0-6
We present predictions for the evolution of the galaxy dust-to-gas (DGR) and dust-to-metal (DTM) ratios from z=0 to 6, using a model for the production, growth, and destruction of dust grainsExpand
Candidate LBV stars in galaxy NGC 7793 found via HST photometry + MUSE spectroscopy
Only about 19 Galactic and 25 extragalactic bonafide luminous blue variables (LBVs) are known to date. This incomplete census prevents our understanding of this crucial phase of massive starExpand
Synthetic Gaia Surveys from the FIRE Cosmological Simulations of Milky Way-mass Galaxies
[Abridged] With Gaia Data Release 2, the astronomical community enters a new era of multidimensional surveys of the Milky Way. This new phase-space view of our Galaxy demands new tools for comparingExpand
Simulating gas kinematic studies of high-redshift galaxies with the HARMONI integral field spectrograph
We present simulated observations of gas kinematics in galaxies formed in 10 pc resolution cosmological simulations with the hydrodynamical + N-body code ramses, using the new ramses2hsim pipelineExpand
Star cluster catalogues for the LEGUS dwarf galaxies
We present the star cluster catalogues for 17 dwarf and irregular galaxies in the HST Treasury Program ‘Legacy ExtraGalactic UV Survey’ (LEGUS). Cluster identification and photometry in thisExpand
Connecting young star clusters to CO molecular gas in NGC 7793 with ALMA–LEGUS
We present an investigation of the relationship between giant molecular cloud (GMC) properties and the associated stellar clusters in the nearby flocculent galaxy NGC 7793. We combine the starExpand
H α morphologies of star clusters: a LEGUS study of H ii region evolution time-scales and stochasticity in low-mass clusters
The morphology of H ii regions around young star clusters provides insight into the time-scales and physical processes that clear a cluster’s natal gas. We study ∼700 young clusters (≤10 Myr) inExpand
A comparison of young star properties with local galactic environment for LEGUS/LITTLE THINGS dwarf irregular galaxies
We have explored the role environmental factors play in determining characteristics of young stellar objects in nearby dwarf irregular and Blue Compact Dwarf galaxies. Star clusters are characterizedExpand
The spatial relation between young star clusters and molecular clouds in M51 with LEGUS
We present a study correlating the spatial locations of young star clusters with those of molecular clouds in NGC 5194, in order to investigate the time-scale over which clusters separate from theirExpand
...
1
2
...

References

SHOWING 1-10 OF 68 REFERENCES
The Star Formation Efficiency in Nearby Galaxies: Measuring Where Gas Forms Stars Effectively
We measure the star formation efficiency (SFE), the star formation rate (SFR) per unit of gas, in 23 nearby galaxies and compare it with expectations from proposed star formation laws and thresholds.Expand
Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample
Physical dust models are presented for 65 galaxies in SINGS that are strongly detected in the four IRAC bands and three MIPS bands. For each galaxy we estimate (1) the total dust mass, (2) theExpand
Estimating gas masses and dust-to-gas ratios from optical spectroscopy
We present a method to estimate the total gas column density, dust-to-gas and dust-to-metal ratios of distant galaxies from rest-frame optical spectra. The technique exploits the sensitivity ofExpand
THE IMPORTANCE OF NEBULAR CONTINUUM AND LINE EMISSION IN OBSERVATIONS OF YOUNG MASSIVE STAR CLUSTERS
In this spectroscopic study of infant massive star clusters, we find that continuum emission from ionized gas rivals the stellar luminosity at optical wavelengths. In addition, we find that nebularExpand
Dust extinction of the stellar continua in starburst galaxies: The Ultraviolet and optical extinction law
We analyze the International Ultraviolet Explorer (IUE) UV and the optical spectra of 39 starburst and blue compact galaxies in order to study the average properties of dust extinction in extendedExpand
Stellar mass-to-light ratios and the Tully-Fisher relation
We have used a suite of simplified spectrophotometric spiral galaxy evolution models to argue that there are substantial variations in stellar mass-to-light (M/L) ratios within and among galaxies,Expand
OPTICAL SPECTROSCOPY AND NEBULAR OXYGEN ABUNDANCES OF THE SPITZER/SINGS GALAXIES
We present intermediate-resolution optical spectrophotometry of 65 galaxies obtained in support of the Spitzer Infrared Nearby Galaxies Survey (SINGS). For each galaxy we obtain a nuclear,Expand
Gas-to-dust mass ratios in local galaxies over a 2 dex metallicity range
Aims. The goal of this paper is to analyse the behaviour of the gas-to-dust mass ratio (G/D) of local Universe galaxies over a wide metallicity range. We especially focus on the low-metallicityExpand
Legacy ExtraGalactic UV Survey with The Hubble Space Telescope: Stellar Cluster Catalogs and First Insights Into Cluster Formation and Evolution in NGC 628
We report the large effort that is producing comprehensive high-level young star cluster (YSC) catalogs for a significant fraction of galaxies observed with the Legacy ExtraGalactic UV Survey (LEGUS)Expand
The CO-to-H2 Conversion Factor from Infrared Dust Emission across the Local Group
We estimate the conversion factor relating CO emission to H2 mass, αCO, in five Local Group galaxies that span approximately an order of magnitude in metallicity—M 31, M 33, the Large MagellanicExpand
...
1
2
3
4
5
...