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On the correlations between galaxy properties and supermassive black hole mass
Beifiori, A.; Corsini, E. M.; Zhu, Y. +1 more
We use a large sample of upper limits and accurate estimates of supermassive black hole (SMBH) masses coupled with libraries of host galaxy velocity dispersions, rotational velocities and photometric parameters extracted from Sloan Digital Sky Survey i-band images to establish correlations between the SMBH and host galaxy parameters. We test wheth…
Dynamical age differences among coeval star clusters as revealed by blue stragglers
Dalessandro, E.; Sanna, N.; Beccari, G. +11 more
Globular star clusters that formed at the same cosmic time may have evolved rather differently from the dynamical point of view (because that evolution depends on the internal environment) through a variety of processes that tend progressively to segregate stars more massive than the average towards the cluster centre. Therefore clusters with the …
GOODS-Herschel Measurements of the Dust Attenuation of Typical Star-forming Galaxies at High Redshift: Observations of Ultraviolet-selected Galaxies at z ~ 2
Magnelli, B.; Altieri, B.; Aussel, H. +20 more
We take advantage of the sensitivity and resolution of the Herschel Space Observatory at 100 and 160 µm to directly image the thermal dust emission and investigate the infrared luminosities (L IR) and dust obscuration of typical star-forming (L*) galaxies at high redshift. Our sample consists of 146 UV-selected galaxies with spect…
The Epoch of Disk Settling: z ~ 1 to Now
Weiner, Benjamin J.; Gardner, Jonathan P.; Faber, S. M. +11 more
We present evidence from a sample of 544 galaxies from the DEEP2 Survey for evolution of the internal kinematics of blue galaxies with stellar masses ranging 8.0 < log M *(M ⊙) < 10.7 over 0.2 < z < 1.2. DEEP2 provides galaxy spectra and Hubble imaging from which we measure emission-line kinematics and galaxy incl…
The Type IIb Supernova 2011dh from a Supergiant Progenitor
Nomoto, Ken'ichi; Fraser, Morgan; Sollerman, Jesper +10 more
A set of hydrodynamical models based on stellar evolutionary progenitors is used to study the nature of SN 2011dh. Our modeling suggests that a large progenitor star—with R ~ 200 R ⊙—is needed to reproduce the early light curve (LC) of SN 2011dh. This is consistent with the suggestion that the yellow super-giant star detected at the loc…
Evidence for a Clumpy, Rotating Gas Disk in a Submillimeter Galaxy at z = 4
Daddi, E.; Walter, F.; Riechers, D. +4 more
We present Karl G. Jansky Very Large Array observations of the CO(2-1) emission in the z = 4.05 submillimeter galaxy (SMG) GN20. These high-resolution data allow us to image the molecular gas at 1.3 kpc resolution just 1.6 Gyr after the big bang. The data reveal a clumpy, extended gas reservoir, 14 ± 4 kpc in diameter, in unprecedented detail. A d…
A Large Population of Massive Compact Post-starburst Galaxies at z > 1: Implications for the Size Evolution and Quenching Mechanism of Quiescent Galaxies
van Dokkum, Pieter G.; Franx, Marijn; Labbé, Ivo +4 more
We study the growth of the red sequence through the number density and structural evolution of a sample of young and old quiescent galaxies at 0 < z < 2. The galaxies are selected from the NEWFIRM Medium-Band Survey in the Cosmic Evolution Survey field. We find a large population of massive young recently quenched ("post-starburst") galaxies…
In-orbit performance of Herschel-HIFI
de Graauw, Th.; Braine, J.; Martín-Pintado, J. +96 more
Aims: In this paper the calibration and in-orbit performance of the Heterodyne Instrument for the Far-Infrared (HIFI) is described.
Methods: The calibration of HIFI is based on a combination of ground and in-flight tests. Dedicated ground tests to determine those instrument parameters that can only be measured accurately using controlled…
The Galactic WC stars. Stellar parameters from spectral analyses indicate a new evolutionary sequence
Sander, A.; Hamann, W. -R.; Todt, H.
Context. The life cycles of massive stars from the main sequence to their explosion as supernovae or gamma ray bursts are not yet fully clear, and the empirical results from spectral analyses are partly in conflict with current evolutionary models. The spectral analysis of Wolf-Rayet stars requires the detailed modeling of expanding stellar atmosp…
Simultaneous Planck, Swift, and Fermi observations of X-ray and γ-ray selected blazars
Tagliaferri, G.; Bonaldi, A.; Bonavera, L. +92 more
We present simultaneous Planck, Swift, Fermi, and ground-based data for 105 blazars belonging to three samples with flux limits in the soft X-ray, hard X-ray, and γ-ray bands, with additional 5GHz flux-density limits to ensure a good probability of a Planck detection. We compare our results to those of a companion paper presenting simultaneous Pla…