Search Publications
A Herschel [C ii] Galactic plane survey. I. The global distribution of ISM gas components
Goldsmith, P. F.; Langer, W. D.; Pineda, J. L. +1 more
Context. The [C ii] 158 µm line is an important tool for understanding the life cycle of interstellar matter. Ionized carbon is present in a variety of phases of the interstellar medium (ISM), including the diffuse ionized medium, warm and cold atomic clouds, clouds in transition from atomic to molecular, and dense and warm photon dominated …
DUst around NEarby Stars. The survey observational results
Heras, A. M.; Fridlund, M.; Olofsson, G. +47 more
Context. Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems. Their solar system counterparts are the asteroid and Edgeworth-Kuiper belts.
Aims: The DUNES survey aims at detecting extra-solar analogues to the Edgeworth-Kuiper belt around solar-type stars, putting in this way t…
Spectrophotometric time series of SN 2011fe from the Nearby Supernova Factory
Aldering, G.; Fakhouri, H. K.; Kowalski, M. +36 more
We present 32 epochs of optical (3300-9700 Å) spectrophotometric observations of the nearby quintessential "normal" type Ia supernova (SN Ia) SN 2011fe in the galaxy M101, extending from -15 to +97 d with respect to B-band maximum, obtained by the Nearby Supernova Factory collaboration. SN 2011fe is the closest (µ = 29.04) and brightest (B
Spectroscopic analysis of DA white dwarfs with 3D model atmospheres
Steffen, M.; Ludwig, H. -G.; Tremblay, P. -E. +1 more
We present the first grid of mean three-dimensional (3D) spectra for pure-hydrogen (DA) white dwarfs based on 3D model atmospheres. We use CO5BOLD radiation-hydrodynamics 3D simulations instead of the mixing-length theory for the treatment of convection. The simulations cover the effective temperature range of 6000 < Teff …
Herschel PEP/HerMES: the redshift evolution (0 ≤ z ≤ 4) of dust attenuation and of the total (UV+IR) star formation rate density
Berta, S.; Magnelli, B.; Nordon, R. +20 more
Using new homogeneous luminosity functions (LFs) in the far-ultraviolet (FUV) from VVDS and in the far-infrared (FIR) from Herschel/PEP and Herschel/HerMES, we studied the evolution of the dust attenuation with redshift. With this information, we were able to estimate the redshift evolution of the total (FUV + FIR) star formation rate density (SFR…
ALMA observations of feeding and feedback in nearby Seyfert galaxies: an AGN-driven outflow in NGC 1433
Tacconi, L. J.; Krips, M.; Schinnerer, E. +9 more
We report ALMA observations of CO(3-2) emission in the Seyfert 2 galaxy NGC 1433 at the unprecedented spatial resolution of 0.''5 = 24 pc. Our aim is to probe active galactic nucleus (AGN) feeding and feedback phenomena through the morphology and dynamics of the gas inside the central kpc. The galaxy NGC 1433 is a strongly barred spiral with three…
Escape of Lyman continuum radiation from local galaxies. Detection of leakage from the young starburst Tol 1247-232
Hayes, M.; Zackrisson, E.; Leitet, E. +2 more
Context. It has been suggested that the escape fraction of hydrogen ionizing photons (fesc) from galaxies is evolving with time, but the picture is far from clear. While evidence for significant escape fractions has been found at high redshifts in several studies, the picture looks different in the closer universe. The lack of local det…
Panchromatic spectral energy distributions of Herschel sources
Berta, S.; Magnelli, B.; Nordon, R. +24 more
Combining far-infrared Herschel photometry from the PACS Evolutionary Probe (PEP) and Herschel Multi-tiered Extragalactic Survey (HerMES) guaranteed time programs with ancillary datasets in the GOODS-N, GOODS-S, and COSMOS fields, it is possible to sample the 8-500 µm spectral energy distributions (SEDs) of galaxies with at least 7-10 bands.…
Planck intermediate results. XI. The gas content of dark matter halos: the Sunyaev-Zeldovich-stellar mass relation for locally brightest galaxies
Böhringer, H.; Kneissl, R.; Dahle, H. +201 more
We present the scaling relation between Sunyaev-Zeldovich (SZ) signal and stellar mass for almost 260,000 locally brightest galaxies (LBGs) selected from the Sloan Digital Sky Survey (SDSS). These are predominantly the central galaxies of their dark matter halos. We calibrate the stellar-to-halo mass conversion using realistic mock catalogues base…
Planck intermediate results. IX. Detection of the Galactic haze with Planck
Bernard, J. -P.; Planck Collaboration; Ade, P. A. R. +186 more
Using precise full-sky observations from Planck, and applying several methods of component separation, we identify and characterise the emission from the Galactic "haze" at microwave wavelengths. The haze is a distinct component of diffuse Galactic emission, roughly centered on the Galactic centre, and extends to | b | ~ 35-50° in Galactic latitud…