Search Publications
The dust content of high-z submillimeter galaxies revealed by Herschel
Berta, S.; Magnelli, B.; Nordon, R. +38 more
We use deep observations taken with the Photodetector Array Camera and Spectrometer (PACS), on board the Herschel satellite as part of the PACS evolutionary probe (PEP) guaranteed project along with submm ground-based observations to measure the dust mass of a sample of high-z submillimeter galaxies (SMGs). We investigate their dust content relati…
Evolution of infrared luminosity functions of galaxies in the AKARI NEP-deep field. Revealing the cosmic star formation history hidden by dust
Le Floc'h, E.; Im, M.; Lee, H. M. +19 more
Aims: Dust-obscured star-formation increases with increasing intensity and increasing redshift. We aim to reveal the cosmic star-formation history obscured by dust using deep infrared observation with AKARI.
Methods: We constructed restframe 8 µm, 12 µm, and total infrared (TIR) luminosity functions (LFs) at 0.15 < z < …
Herschel-ATLAS: The dust energy balance in the edge-on spiral galaxy UGC 4754
Rodighiero, G.; de Zotti, G.; Herranz, D. +39 more
We use Herschel PACS and SPIRE observations of the edge-on spiral galaxy UGC 4754, taken as part of the H-ATLAS SDP observations, to investigate the dust energy balance in this galaxy. We build detailed SKIRT radiative models based on SDSS and UKIDSS maps and use these models to predict the far-infrared emission. We find that our radiative transfe…
The Palermo Swift-BAT hard X-ray catalogue. II. Results after 39 months of sky survey
Campana, S.; Tagliaferri, G.; Cusumano, G. +12 more
Aims: We present the Palermo Swift-BAT hard X-ray catalogue obtained from the analysis of data acquired during the first 39 months of the Swift mission.
Methods: We developed a dedicated software to perform the data reduction, mosaicking, and source detection of the BAT survey data. We analyzed the BAT dataset in three energy bands (14-1…
Probing the molecular interstellar medium of M82 with Herschel-SPIRE spectroscopy
Elbaz, D.; Pérez-Fournon, I.; Bock, J. J. +60 more
We present the observations of the starburst galaxy M82 taken with the Herschel SPIRE Fourier-transform spectrometer. The spectrum (194-671 µm) shows a prominent CO rotational ladder from J = 4-3 to 13-12 emitted by the central region of M82. The fundamental properties of the gas are well constrained by the high J lines observed for the firs…
Herschel observations of water vapour in Markarian 231
Veilleux, S.; Sanders, D. B.; Savini, G. +32 more
The Ultra luminous infrared galaxy (ULIRG) Mrk 231 reveals up to seven rotational lines of water (H2O) in emission, including a very high-lying (Eupper = 640 K) line detected at a 4σ level, within the Herschel/SPIRE wavelength range (190 < λ (µm) < 640), whereas PACS observations show one H2O line at 78…
Water cooling of shocks in protostellar outflows. Herschel-PACS map of L1157
de Graauw, Th.; Liseau, R.; Braine, J. +62 more
Context. The far-IR/sub-mm spectral mapping facility provided by the Herschel-PACS and HIFI instruments has made it possible to obtain, for the first time, images of H2O emission with a spatial resolution comparable to ground based mm/sub-mm observations.
Aims: In the framework of the Water In Star-forming regions with Herschel (WI…
The bright end of the z ~ 7 UV luminosity function from a wide and deep HAWK-I survey
Maiolino, R.; Dickinson, M.; Giavalisco, M. +23 more
Aims: We perform a deep search for galaxies in the redshift range 6.5 ≤ z ≤ 7.5 to measure the evolution of the number density of luminous galaxies in this redshift range and derive useful constraints on the evolution of their luminosity function.
Methods: We present here the second half of an ESO Large Programme, which exploits the uniq…
How was the Hubble sequence 6 Gyr ago?
Flores, H.; Hammer, F.; Puech, M. +3 more
The way galaxies assemble their mass to form the well-defined Hubble sequence is amongst the most debated topic in modern cosmology. One difficulty is to link distant galaxies, which emitted their light several Gyr ago, to those at present epoch. Such a link is affected by the evolution or the transformation of galaxies, as well as by numerous sel…
Determining dust temperatures and masses in the Herschel era: The importance of observations longward of 200 micron
Bernard, J. -P.; Reach, W. T.; Okumura, K. +21 more
Context. The properties of the dust grains (e.g., temperature and mass) can be derived from fitting far-IR SEDs (≥100 µm). Only with SPIRE on Herschel has it been possible to get high spatial resolution at 200 to 500 µm that is beyond the peak (~160 µm) of dust emission in most galaxies.
Aims: We investigate the differences …