Search Publications
Ultraviolet to infrared emission of z > 1 galaxies: Can we derive reliable star formation rates and stellar masses?
Morrison, G.; Buat, V.; Boquien, M. +6 more
Aims: Our knowledge of the cosmic mass assembly relies on measurements of star formation rates (SFRs) and stellar masses (Mstar), of galaxies as a function of redshift. These parameters must be estimated in a consistent way with a good knowledge of systematics before studying their correlation and the variation of the specific SFR.…
Massive compact galaxies with high-velocity outflows: morphological analysis and constraints on AGN activity
Moustakas, J.; Heinz, S.; Hickox, R. C. +9 more
We investigate the process of rapid star formation quenching in a sample of 12 massive galaxies at intermediate redshift (z ∼ 0.6) that host high-velocity ionized gas outflows (v > 1000 km s-1). We conclude that these fast outflows are most likely driven by feedback from star formation rather than active galactic nuclei (AGNs). We us…
Herschel Key Program Heritage: a Far-Infrared Source Catalog for the Magellanic Clouds
Boyer, Martha L.; Matsuura, Mikako; Meixner, Margaret +19 more
Observations from the HERschel Inventory of the Agents of Galaxy Evolution (HERITAGE) have been used to identify dusty populations of sources in the Large and Small Magellanic Clouds (LMC and SMC). We conducted the study using the HERITAGE catalogs of point sources available from the Herschel Science Center from both the Photodetector Array Camera…
LoCuSS: hydrostatic mass measurements of the high-LX cluster sample - cross-calibration of Chandra and XMM-Newton
Smith, Graham P.; Marrone, Daniel P.; Finoguenov, Alexis +5 more
We present a consistent analysis of Chandra and XMM-Newton observations of an approximately mass-selected sample of 50 galaxy clusters at 0.15 < z < 0.3 - the `LoCuSS high-LX sample'. We apply the same analysis methods to data from both satellites, including newly developed analytic background models that predict the spatial varia…
Light sterile neutrinos after BICEP-2
Gariazzo, Stefano; Archidiacono, Maria; Fornengo, Nicolao +3 more
The recent discovery of B-modes in the polarization pattern of the Cosmic Microwave Background by the BICEP2 experiment has important implications for neutrino physics. We revisit cosmological bounds on light sterile neutrinos and show that they are compatible with all current cosmological data provided that the mass is relatively low. Using CMB d…
Spitzer Space Telescope spectra of post-AGB stars in the Large Magellanic Cloud - polycyclic aromatic hydrocarbons at low metallicities
Sahai, R.; Hony, S.; Ita, Yoshifusa +26 more
This paper reports variations of polycyclic aromatic hydrocarbons (PAHs) features that were found in Spitzer Space Telescope spectra of carbon-rich post-asymptotic giant branch (post-AGB) stars in the Large Magellanic Cloud (LMC). The paper consists of two parts. The first part describes our Spitzer spectral observing programme of 24 stars includi…
TANAMI blazars in the IceCube PeV-neutrino fields
Gehrels, N.; Thompson, D. J.; Wilms, J. +39 more
The IceCube Collaboration has announced the discovery of a neutrino flux in excess of the atmospheric background. Owing to the steeply falling atmospheric background spectrum, events at PeV energies most likely have an extraterrestrial origin. We present the multiwavelength properties of the six radio-brightest blazars that are positionally coinci…
A Molecular Line Scan in the Hubble Deep Field North
Daddi, E.; Maiolino, R.; Menten, K. M. +20 more
We present a molecular line scan in the Hubble Deep Field North (HDF-N) that covers the entire 3 mm window (79-115 GHz) using the IRAM Plateau de Bure Interferometer. Our CO redshift coverage spans z <~ 0.45, 1 <~ z <~ 1.9 and all z >~ 2. We reach a CO detection limit that is deep enough to detect essentially all z > 1 CO lines repo…
Variation in the dust emissivity index across M 33 with Herschel and Spitzer (HerM 33es)
Boquien, M.; Braine, J.; van der Werf, P. +12 more
We study the wavelength dependence of the dust emission as a function of position and environment across the disk of M 33 using Spitzer and Herschel photometric data. M 33 is a Local Group spiral with slightly subsolar metallicity, which makes it an ideal stepping-stone to less regular and lower-metallicity objects such as dwarf galaxies and, prob…
The Black Hole Mass of NGC 4151. II. Stellar Dynamical Measurement from Near-infrared Integral Field Spectroscopy
Peterson, Bradley M.; Pogge, Richard W.; Storchi-Bergmann, Thaisa +8 more
We present a revised measurement of the mass of the central black hole (M BH ) in the Seyfert 1 galaxy NGC 4151. The new stellar dynamical mass measurement is derived by applying an axisymmetric orbit-superposition code to near-infrared integral field data obtained using adaptive optics with the Gemini Near-infrared Integral Field Spect…