Search Publications
The CO-to-H2 Conversion Factor and Dust-to-gas Ratio on Kiloparsec Scales in Nearby Galaxies
Roussel, H.; Armus, L.; Hunt, L. K. +42 more
We present ~kiloparsec spatial resolution maps of the CO-to-H2 conversion factor (αCO) and dust-to-gas ratio (DGR) in 26 nearby, star-forming galaxies. We have simultaneously solved for αCO and the DGR by assuming that the DGR is approximately constant on kiloparsec scales. With this assumption, we can combine maps…
Fast Molecular Outflows in Luminous Galaxy Mergers: Evidence for Quasar Feedback from Herschel
Lutz, D.; Genzel, R.; Maiolino, R. +18 more
We report the results from a systematic search for molecular (OH 119 µm) outflows with Herschel/PACS in a sample of 43 nearby (z < 0.3) galaxy mergers, mostly ultraluminous infrared galaxies (ULIRGs) and QSOs. We find that the character of the OH feature (strength of the absorption relative to the emission) correlates with that of the 9.7…
ALMA Redshifts of Millimeter-selected Galaxies from the SPT Survey: The Redshift Distribution of Dusty Star-forming Galaxies
Gladders, M. D.; Menten, K. M.; Bock, J. J. +64 more
Using the Atacama Large Millimeter/submillimeter Array, we have conducted a blind redshift survey in the 3 mm atmospheric transmission window for 26 strongly lensed dusty star-forming galaxies (DSFGs) selected with the South Pole Telescope. The sources were selected to have S 1.4 mm > 20 mJy and a dust-like spectrum and, to remove lo…
Validation of the Equilibrium Model for Galaxy Evolution to z ~ 3 through Molecular Gas and Dust Observations of Lensed Star-forming Galaxies
Saintonge, Amélie; Berta, Stefano; Wuyts, Stijn +11 more
We combine IRAM Plateau de Bure Interferometer and Herschel PACS and SPIRE measurements to study the dust and gas contents of high-redshift star-forming galaxies. We present new observations for a sample of 17 lensed galaxies at z = 1.4-3.1, which allow us to directly probe the cold interstellar medium of normal star-forming galaxies with stellar …
What Determines the Density Structure of Molecular Clouds? A Case Study of Orion B with Herschel
Hill, T.; André, Ph.; Arzoumanian, D. +19 more
A key parameter to the description of all star formation processes is the density structure of the gas. In this Letter, we make use of probability distribution functions (PDFs) of Herschel column density maps of Orion B, Aquila, and Polaris, obtained with the Herschel Gould Belt survey (HGBS). We aim to understand which physical processes influenc…
Explaining the [C II]157.7 µm Deficit in Luminous Infrared Galaxies—First Results from a Herschel/PACS Study of the GOALS Sample
Sturm, E.; Veilleux, S.; Sanders, D. B. +26 more
We present the first results of a survey of the [C II]157.7 µm emission line in 241 luminous infrared galaxies (LIRGs) comprising the Great Observatories All-sky LIRG Survey (GOALS) sample, obtained with the PACS instrument on board the Herschel Space Observatory. The [C II] luminosities, L [C II], of the LIRGs in GOALS range from…
Gravitational Lens Models Based on Submillimeter Array Imaging of Herschel-selected Strongly Lensed Sub-millimeter Galaxies at z > 1.5
Maiolino, R.; Pérez-Fournon, I.; Ivison, R. J. +46 more
Strong gravitational lenses are now being routinely discovered in wide-field surveys at (sub-)millimeter wavelengths. We present Submillimeter Array (SMA) high-spatial resolution imaging and Gemini-South and Multiple Mirror Telescope optical spectroscopy of strong lens candidates discovered in the two widest extragalactic surveys conducted by the …
A Correlation between Star Formation Rate and Average Black Hole Accretion in Star-forming Galaxies
Gorjian, Varoujan; Dey, Arjun; Alberts, Stacey +14 more
We present a measurement of the average supermassive black hole accretion rate (BHAR) as a function of the star formation rate (SFR) for galaxies in the redshift range 0.25 < z < 0.8. We study a sample of 1767 far-IR-selected star-forming galaxies in the 9 deg2 Boötes multi-wavelength survey field. The SFR is estimated using 250 &…
A Significantly Low CO Abundance toward the TW Hya Protoplanetary Disk: A Path to Active Carbon Chemistry?
Cleeves, L. Ilsedore; Bergin, Edwin A.; Qi, Chunhua +2 more
In this Letter we report the CO abundance relative to H2 derived toward the circumstellar disk of the T-Tauri star TW Hya from the HD (1 - 0) and C18O (2 - 1) emission lines. The HD (1 - 0) line was observed by the Herschel Space Observatory Photodetector Array Camera and Spectrometer whereas C18O (2 - 1) observati…
HerMES: Candidate Gravitationally Lensed Galaxies and Lensing Statistics at Submillimeter Wavelengths
Aussel, H.; Pérez-Fournon, I.; Ivison, R. J. +83 more
We present a list of 13 candidate gravitationally lensed submillimeter galaxies (SMGs) from 95 deg2 of the Herschel Multi-tiered Extragalactic Survey, a surface density of 0.14 ± 0.04 deg-2. The selected sources have 500 µm flux densities (S 500) greater than 100 mJy. Gravitational lensing is confirmed by fol…