Publications (14)
High Gas Surface Densities yet Low UV Attenuation in z 1 Disc Galaxies
Raanan Nordon
The gas in galaxies is both the fuel for star formation and a medium that attenuates the light of the young stars. We study the relations between UV attenuation, spectral slope, st…
Validation of the equilibrium model for galaxy evolution to z~3 through molecular gas and dust observations of lensed star-forming galaxies
Amelie Saintonge, Dieter Lutz, Reinhard Genzel +11
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 ob…
A hot transient outflow from eta Carinae
Ehud Behar, Raanan Nordon, Eyal Ben-Bassat +1
eta Carinae is a stellar binary system with a period of 5.54 years. It harbors one of the brightest and most massive stars in our galaxy. This paper presents spectroscopic evidence…
Star formation black hole growth and dusty tori in the most luminous AGNs at z=2-3.5
Hagai Netzer, Caterina Lani, Raanan Nordon +3
We report herschel observations of 100 very luminous, optically selected AGNs at z=2-3.5 with log(LUV)(erg/sec)> 46.5, where LUV=L1350A. The distribution in LUV is similar to the g…
C+/H2 Gas in Star-Forming Clouds and Galaxies
Raanan Nordon, Amiel Sternberg
We present analytic theory for the total column density of singly ionized carbon (C+) in the optically thick photon dominated regions (PDRs) of far-UV irradiated (star-forming) mol…
Star formation in LINER host galaxies at z~0.3
Silvia Tommasin, Hagai Netzer, Amiel Sternberg +8
We present the results of a Herschel-PACS study of a sample of 97 LINERs at redshift z\sim 0.3 selected from the zCOSMOS survey. Of these sources, 34 are detected in a least one PA…
Narrow Radiative Recombination Continua: A Signature of Ions Crossing the Contact Discontinuity of Astrophysical Shocks
Raanan Nordon, Ehud Behar, Noam Soker +2
X-rays from planetary nebulae (PNs) are believed to originate from a shock driven into the fast stellar wind (v ~ 1000 km/s) as it collides with an earlier circumstellar slow wind…
Star formation and AGN activity in the most luminous LINERs in the local universe
Mirjana PoviÄ, Isabel Márquez, Hagai Netzer +4
This work presents the properties of 42 objects in the group of the most luminous, highest star formation rate LINERs at z = 0.04 - 0.11. We obtained long-slit spectroscopy of the…
On Star Formation Rates and Star Formation Histories of Galaxies out to z ~ 3
Stijn Wuyts, Natascha M. Forster Schreiber, Dieter Lutz +23
We compare multi-wavelength SFR indicators out to z~3 in GOODS-South. Our analysis uniquely combines U-to-8um photometry from FIREWORKS, MIPS 24um and PACS 70, 100, and 160um photo…
Galaxy Structure and Mode of Star Formation in the SFR-Mass Plane from z ~ 2.5 to z ~ 0.1
Stijn Wuyts, Natascha M. Forster Schreiber, Arjen van der Wel +23
We analyze the dependence of galaxy structure (size and Sersic index) and mode of star formation (Σ_SFR and SFR_IR/SFR_UV) on the position of galaxies in the SFR versus Mass diagr…
High-resolution X-ray Spectroscopy of BD +30 3639
Joel H. Kastner, Young Sam Yu, John Houck +3
We present preliminary results from the first X-ray gratings spectrometer observations of a planetary nebula (PN). We have used the Chandra X-ray Observatory Low Energy Transmissio…
A high-velocity transient outflow in Eta Carinae
Ehud Behar, Raanan Nordon, Noam Soker
We analyze velocity profiles of the X-ray spectral lines emitted by the Eta Carinae stellar binary at four epochs, just before the X-ray minimum (associated with periastron) and mo…
Variability of a stellar corona on a time scale of days
Raanan Nordon, Ehud Behar, Stephen A. Drake
Elemental abundance effects in active coronae have eluded our understanding for almost three decades, since the discovery of the First Ionization Potential (FIP) effect on the sun.…
The X-Ray Spectrum of a Planetary Nebula at High Resolution: Chandra Gratings Spectroscopy of BD+30 3639
Young Sam Yu, Raanan Nordon, Joel H. Kastner +3
We present the results of the first X-ray gratings spectroscopy observations of a planetary nebula (PN), the X-ray-bright, young BD+30 3639. We observed BD+30 3639 for a total of 3…