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Dust May Be More Rare Than Expected in Metal Poor Galaxies
David B. Fisher, Alberto D. Bolatto, Rodrigo Herrera-Camus +7
'Normal' galaxies observed at z>6, when the Universe was <1 billion years old, thus far show no evidence of the cold dust that accompanies star formation in the local Universe, whe…
HERschel Observations of Edge-on Spirals (HEROES). I: Far-infrared morphology and dust mass determination
J. Verstappen, J. Fritz, M. Baes +11
Context. Edge-on spiral galaxies with prominent dust lanes provide us with an excellent opportunity to study the distribution and properties of the dust within them. The HEROES pro…
Mapping dust through emission and absorption in nearby galaxies
K. Kreckel, B. Groves, E. Schinnerer +13
Dust has long been identified as a barrier to measuring inherent galaxy properties. However, the link between dust and attenuation is not straightforward and depends on both the am…
Herschel Exploitation of Local Galaxy Andromeda (HELGA) III: The Star Formation Law in M31
George P. Ford, Walter K. Gear, Matthew W. L. Smith +17
We present a detailed study of how the Star Formation Rate (SFR) relates to the interstellar medium (ISM) of M31 at ~140pc scales. The SFR is calculated using the far-ultraviolet a…
The CO-to-H2 Conversion Factor and Dust-to-Gas Ratio on Kiloparsec Scales in Nearby Galaxies
K. M. Sandstrom, A. K. Leroy, F. Walter +42
We present kiloparsec (kpc) spatial resolution maps of the CO-to-H2 conversion factor (alpha_co) and dust-to-gas ratio (DGR) in 26 nearby, star-forming galaxies. We have simultaneo…
The Panchromatic Hubble Andromeda Treasury IV. A Probabilistic Approach to Inferring the High Mass Stellar Initial Mass Function and Other Power-law Functions
Daniel R. Weisz, Morgan Fouesneau, David W. Hogg +13
We present a probabilistic approach for inferring the parameters of the present day power-law stellar mass function (MF) of a resolved young star cluster. This technique (a) fully…
The Spatial Distribution of Dust and Stellar Emission of the Magellanic Clouds
Ramin A. Skibba, Charles W. Engelbracht, Gonzalo Aniano +24
We study the emission by dust and stars in the Large and Small Magellanic Clouds, a pair of low-metallicity nearby galaxies, as traced by their spatially resolved spectral energy d…
Modeling Dust and Starlight in Galaxies Observed by Spitzer and Herschel: NGC 628 and NGC 6946
G. Aniano, B. T. Draine, D. Calzetti +26
We characterize the dust in NGC628 and NGC6946, two nearby spiral galaxies in the KINGFISH sample. With data from 3.6um to 500um, dust models are strongly constrained. Using the Dr…
Dust-to-Gas Ratio in the Extremely Metal Poor Galaxy I ZW 18
Rodrigo Herrera-Camus, David B. Fisher, Alberto D. Bolatto +7
The blue compact dwarf galaxy I Zw 18 is one of the most metal poor systems known in the local Universe (12 + log(O/H) 7.17). In this work we study I Zw 18 using data from {\it…
Herschel/SPIRE Observations of the Dusty Disk of NGC 4244
B. W. Holwerda, S. Bianchi, T. Böker +7
We present Herschel/SPIRE images at 250, 350, and 500 μm of NGC 4244, a typical low-mass, disk-only and edge-on spiral galaxy. The dust disk is clumpy and shows signs of truncation…
Herschel Far-Infrared and Sub-millimeter Photometry for the KINGFISH Sample of Nearby Galaxies
D. A. Dale, G. Aniano, C. W. Engelbracht +39
New far-infrared and sub-millimeter photometry from the Herschel Space Observatory is presented for 61 nearby galaxies from the Key Insights on Nearby Galaxies: A Far-Infrared Surv…
Surveying the Agents of Galaxy Evolution in the Tidally-Stripped, Low Metallicity Small Magellanic Cloud (SAGE-SMC). I. Overview
Karl D. Gordon, Margaret Meixner, Marilyn Meade +57
The Small Magellanic Cloud (SMC) provides a unique laboratory for the study of the lifecycle of dust given its low metallicity (~1/5 solar) and relative proximity (~60 kpc). This m…
The State of the Gas and the Relation Between Gas and Star Formation at Low Metallicity: the Small Magellanic Cloud
Alberto D. Bolatto, Adam K. Leroy, Katherine Jameson +15
We compare atomic gas, molecular gas, and the recent star formation rate (SFR) inferred from H-alpha in the Small Magellanic Cloud (SMC). By using infrared dust emission and local…
Young, UV-bright Stars Dominate Dust Heating in Star Forming Galaxies
Ka-Hei Law, Karl D. Gordon, K. A. Misselt
In star forming galaxies, dust plays a significant role in shaping the ultraviolet (UV) through infrared (IR) spectrum. Dust attenuates the radiation from stars, and re-radiates th…
The Emission by Dust and Stars of Nearby Galaxies in the Herschel KINGFISH Survey
Ramin A. Skibba, Charles W. Engelbracht, Daniel Dale +29
Using new far-infrared imaging from the Herschel Space Observatory with ancillary data from ultraviolet to submillimeter wavelengths, we estimate the total emission from dust and s…
The CO-to-H2 Conversion Factor From Infrared Dust Emission Across the Local Group
Adam K. Leroy, Alberto Bolatto, Karl Gordon +8
We estimate the conversion factor relating CO emission to H2 mass, alpha_CO, in five Local Group galaxies that span approximately an order of magnitude in metallicity - M31, M 33,…
A survey of diffuse interstellar bands in the Andromeda galaxy: optical spectroscopy of M31 OB stars
Martin A. Cordiner, Nick L. J. Cox, Christopher J. Evans +4
We present the largest sample to-date of intermediate-resolution blue-to-red optical spectra of B-type supergiants in M31 and undertake the first survey of diffuse interstellar ban…
A nearby GRB host prototype for z~7 Lyman-break galaxies: Spitzer-IRS and X-shooter spectroscopy of the host galaxy of GRB031203
D. Watson, J. French, L. Christensen +7
Gamma-ray burst (GRB) host galaxies have been studied extensively in optical photometry and spectroscopy. Here we present the first mid-infrared spectrum of a GRB host, HG031203. I…
LABOCA observations of giant molecular clouds in the south west region of the Small Magellanic Cloud
Caroline Bot, Monica Rubio, Francois Boulanger +8
The amount of molecular gas is a key for understanding the future star formation in a galaxy. Because H2 is difficult to observe directly in dense and cold clouds, tracers like CO…
Star-Forming or Starbursting? The Ultraviolet Conundrum
M. Boquien, D. Calzetti, R. Kennicutt +6
Compared to starburst galaxies, normal star forming galaxies have been shown to display a much larger dispersion of the dust attenuation at fixed reddening through studies of the I…
Warm and Dense Molecular Gas in the N159 Region: 12CO J=4-3 and 13CO J=3-2 Observations with NANTEN2 and ASTE
Yoji Mizuno, Akiko Kawamura, Toshikazu Onishi +29
New 12CO J=4-3 and 13CO J=3-2 observations of the N159 region in the Large Magellanic Cloud have been made. The 12CO J=4-3 distribution is separated into three clumps. These new me…
Spitzer Observations of Cold Dust Galaxies
C. N. A. Willmer, G. H. Rieke, Emeric Le Floc'h +4
We combine new Spitzer Space Telescope observations in the mid- and far-infrared with SCUBA 850 micron observations to improve the measurement of dust temperatures, masses and lumi…
The Mass-Loss Return From Evolved Stars to the LMC: Empirical Relations for Excess Emission at 8 and 24 μm
Sundar Srinivasan, Margaret Meixner, Claus Leitherer +18
We present empirical relations describing excess emission from evolved stars in the Large Magellanic Cloud (LMC) using data from the SAGE (Surveying the Agents of a Galaxy's Evolut…