Search Publications
Cosmicflows-2: The Data
Dolphin, Andrew E.; Wu, Po-Feng; Shaya, Edward J. +11 more
Cosmicflows-2 is a compilation of distances and peculiar velocities for over 8000 galaxies. Numerically the largest contributions come from the luminosity-line width correlation for spirals, the Tully-Fisher relation (TFR), and the related fundamental plane relation for E/S0 systems, but over 1000 distances are contributed by methods that provide …
The molecular universe
Tielens, A. G. G. M.
Molecular absorption and emission bands dominate the visible, infrared, and submillimeter spectra of most objects with associated gas. These observations reveal a surprisingly rich array of molecular species and attest to a complex chemistry taking place in the harsh environment of the interstellar medium of galaxies. Molecules are truly everywher…
New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign
Ono, Yoshiaki; Ouchi, Masami; Stark, Daniel P. +13 more
Understanding cosmic reionization requires the identification and characterization of early sources of hydrogen-ionizing photons. The 2012 Hubble Ultra Deep Field (UDF12) campaign has acquired the deepest infrared images with the Wide Field Camera 3 aboard Hubble Space Telescope and, for the first time, systematically explored the galaxy populatio…
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…
A dust-obscured massive maximum-starburst galaxy at a redshift of 6.34
Thomson, A. P.; Altieri, B.; Pérez-Fournon, I. +61 more
Massive present-day early-type (elliptical and lenticular) galaxies probably gained the bulk of their stellar mass and heavy elements through intense, dust-enshrouded starbursts--that is, increased rates of star formation--in the most massive dark-matter haloes at early epochs. However, it remains unknown how soon after the Big Bang massive starbu…
Herschel view of the Taurus B211/3 filament and striations: evidence of filamentary growth?
Martin, P. G.; Hill, T.; White, G. L. +24 more
We present first results from the Herschel Gould Belt survey for the B211/L1495 region in the Taurus molecular cloud. Thanks to their high sensitivity and dynamic range, the Herschel images reveal the structure of the dense, star-forming filament B211 with unprecedented detail, along with the presence of striations perpendicular to the filament an…
The Abundance of Star-forming Galaxies in the Redshift Range 8.5-12: New Results from the 2012 Hubble Ultra Deep Field Campaign
Ono, Yoshiaki; Ouchi, Masami; Stark, Daniel P. +13 more
We present the results of the deepest search to date for star-forming galaxies beyond a redshift z ~= 8.5 utilizing a new sequence of near-infrared Wide-Field Camera 3 (WFC3/IR) images of the Hubble Ultra Deep Field (UDF). This "UDF12" campaign completed in 2012 September doubles the earlier exposures with WFC3/IR in this field and quadruples the …
CANDELS Multi-wavelength Catalogs: Source Detection and Photometry in the GOODS-South Field
Barro, Guillermo; Castellano, Marco; Ferguson, Henry C. +33 more
We present a UV to mid-infrared multi-wavelength catalog in the CANDELS/GOODS-S field, combining the newly obtained CANDELS HST/WFC3 F105W, F125W, and F160W data with existing public data. The catalog is based on source detection in the WFC3 F160W band. The F160W mosaic includes the data from CANDELS deep and wide observations as well as previous …
Third-epoch Magellanic Cloud Proper Motions. I. Hubble Space Telescope/WFC3 Data and Orbit Implications
Anderson, Jay; van der Marel, Roeland P.; Besla, Gurtina +2 more
We present proper motions for the Large and Small Magellanic Clouds (LMC and SMC) based on three epochs of Hubble Space Telescope data, spanning a ~7 yr baseline, and centered on fields with background QSOs. The first two epochs, the subject of past analyses, were obtained with ACS/HRC, and have been reanalyzed here. The new third epoch with WFC3/…
The VLT-FLAMES Tarantula Survey. VIII. Multiplicity properties of the O-type star population
Crowther, P. A.; Lennon, D. J.; Herrero, A. +14 more
Context. The Tarantula Nebula in the Large Magellanic Cloud is our closest view of a starburst region and is the ideal environment to investigate important questions regarding the formation, evolution and final fate of the most massive stars.
Aims: We analyze the multiplicity properties of the massive O-type star population observed through m…