Search Publications
A Correlation between Lyα Spectral Line Profile and Rest-frame UV Morphology
Dickinson, Mark; Mobasher, Bahram; Hemmati, Shoubaneh +6 more
We explore the relationship between the spectral shape of the Lyα emission and the UV morphology of the host galaxy using a sample of 304 Lyα-emitting BVi-dropouts at 3 < z < 7 in the Great Observatories Origins Deep Survey and Cosmic Evolution Survey fields. Using our extensive reservoir of high-quality Keck DEIMOS spectra combined with Hub…
An X-ray variable absorber within the broad line region in Fairall 51
Guainazzi, M.; Piconcelli, E.; Wilms, J. +3 more
Context. Fairall 51 is a polar-scattered Seyfert 1 galaxy, a type of active galaxy believed to represent a bridge between unobscured type-1 and obscured type-2 objects. Fairall 51 has shown complex and variable X-ray absorption, but little is known about its origin.
Aims: In our research, we observed Fairall 51 with the X-ray satellite Suzaku…
Geologic evolution of the eastern Eridania basin: Implications for aqueous processes in the southern highlands of Mars
Le Deit, Laetitia; Hauber, Ernst; Jaumann, Ralf +1 more
The Terra Sirenum region of Mars is thought to have hosted the Eridania paleolake during the Late Noachian/Early Hesperian, and it offers an insight into the regional aqueous history of Mars. We focus on four basins, including Atlantis, Simois, Caralis, and an unnamed basin. They are hypothesized to have hosted isolated lakes after the drainage of…
Philae localization from CONSERT/Rosetta measurement
Kofman, Wlodek; Herique, Alain; Rogez, Yves +3 more
On 12 November 2014 at 15:34 UTC, after a 7-h descent, the Philae lander made contact with the surface of the comet Churyumov-Gerasimenko (67P/CG) in the centre of the intended landing zone. Following the failure of its anchoring systems, it bounced and continued to fly ballistically. A couple of hours later, telemetry transmitted to Rosetta showe…
Kinetically modified nonminimal chaotic inflation
Pallis, Constantinos
We consider supersymmetric (SUSY) and non-SUSY models of chaotic inflation based on the ϕn potential with 2 ≤n ≤6 . We show that the coexistence of a nonminimal coupling to gravity fR=1 +cRϕn /2 with a kinetic mixing of the form fK=cKfRm can accommodate inflati…
The XMM-Newton survey in the H-ATLAS field
Georgakakis, A.; Vignali, C.; Gilli, R. +8 more
Wide-area X-ray and far-infrared surveys are a fundamental tool to investigate the link between AGN growth and star formation, especially in the low-redshift universe (z ≲ 1). The Herschel Terahertz Large Area survey (H-ATLAS) has covered 550 deg2 in five far-infrared and sub-mm bands, 16 deg2 of which have been presented in …
Evidence of the Dynamics of Relativistic Jet Launching in Quasars
Punsly, Brian
Hubble Space Telescope (HST) spectra of the EUV, the optically thick emission from the innermost accretion flow onto the central supermassive black hole, indicate that radio loud quasars (RLQs) tend to be EUV weak compared to the radio-quiet quasars; yet the remainder of the optically thick thermal continuum is indistinguishable. The deficit of EU…
Detailed afterglow modelling and host galaxy properties of the dark GRB 111215A
Kouveliotou, C.; Wijers, R. A. M. J.; Fynbo, J. P. U. +13 more
Gamma-ray burst (GRB) 111215A was bright at X-ray and radio frequencies, but not detected in the optical or near-infrared (nIR) down to deep limits. We have observed the GRB afterglow with the Westerbork Synthesis Radio Telescope and Arcminute Microkelvin Imager at radio frequencies, with the William Herschel Telescope and Nordic Optical Telescope…
The local stellar luminosity function and mass-to-light ratio in the near-infrared
Rybizki, J.; Dettbarn, C.; Jahreiß, H. +3 more
A new sample of stars, representative of the solar neighbourhood luminosity function (LF), is constructed from the Hipparcos catalogue and the Fifth Catalogue of Nearby Stars. We have cross-matched to sources in the Two Micron All Sky Survey catalogue so that for all stars individually determined near-infrared (NIR) photometry is available on a ho…
Fine Structure of Metric Type IV Radio Bursts Observed with the ARTEMIS-IV Radio-Spectrograph: Association with Flares and Coronal Mass Ejections
Hillaris, A.; Preka-Papadema, P.; Moussas, X. +5 more
Fine structures embedded in type IV burst continua may be used as diagnostics of the magnetic-field restructuring and the corresponding energy release associated with the low-corona development of flare or coronal mass ejection (CME) events. A catalog of 36 type IV bursts observed with the SAO receiver of the ARTEMIS-IV solar radio-spectrograph in…