Search Publications
Response of the Photospheric Magnetic Field to the X2.2 Flare on 2011 February 15
Liu, Yang; Liu, Chang; Wang, Haimin +3 more
It is well known that the long-term evolution of the photospheric magnetic field plays an important role in building up free energy to power solar eruptions. Observations, despite being controversial, have also revealed a rapid and permanent variation of the photospheric magnetic field in response to the coronal magnetic field restructuring during…
Hint of a transiting extended atmosphere on 55 Cancri b
Moutou, C.; Bonfils, X.; Ehrenreich, D. +9 more
The naked-eye star
Planetary surface dating from crater size-frequency distribution measurements: Spatial randomness and clustering
Platz, T.; Michael, G. G.; Kneissl, T. +1 more
We describe a quantitative procedure to measure the degree of clustering in an observed crater population relative to a series of randomly distributed populations. We split the population by according to crater size to be able to identify clustering at different scales, and find that a clustering analysis based on the mean 2nd-closest neighbour di…
Spectral Energy Distributions of Local Luminous and Ultraluminous Infrared Galaxies
Sanders, D. B.; Frayer, D. T.; Kartaltepe, J. S. +19 more
Luminous (LIRGs; log (L IR/L ⊙) = 11.00-11.99) and ultraluminous infrared galaxies (ULIRGs; log (L IR/L ⊙) = 12.00-12.99) are the most extreme star-forming galaxies in the universe. The local (U)LIRGs provide a unique opportunity to study their multi-wavelength properties in detail for comparison with th…
Deep Near-infrared Spectroscopy of Passively Evolving Galaxies at z >~ 1.4
Cimatti, A.; Daddi, E.; Sanders, D. B. +21 more
We present the results of new near-IR spectroscopic observations of passive galaxies at z >~ 1.4 in a concentration of BzK-selected galaxies in the COSMOS field. The observations have been conducted with Subaru/MOIRCS, and have resulted in absorption lines and/or continuum detection for 18 out of 34 objects. This allows us to measure spectrosco…
On the Nature and Genesis of EUV Waves: A Synthesis of Observations from SOHO, STEREO, SDO, and Hinode (Invited Review)
Vourlidas, Angelos; Patsourakos, Spiros
A major, albeit serendipitous, discovery of the SOlar and Heliospheric Observatory mission was the observation by the Extreme Ultraviolet Telescope (EIT) of large-scale extreme ultraviolet (EUV) intensity fronts propagating over a significant fraction of the Sun's surface. These so-called EIT or EUV waves are associated with eruptive phenomena and…
The dominant role of mergers in the size evolution of massive early-type galaxies since z ~ 1
Kneib, J. -P.; Aussel, H.; Cimatti, A. +60 more
Aims: The role of galaxy mergers in massive galaxy evolution, and in particular to mass assembly and size growth, remains an open question. In this paper we measure the merger fraction and rate, both minor and major, of massive early-type galaxies (M ⋆ ≥ 1011 M⊙) in the COSMOS field, and study their role in m…
The Galaxy Zoo survey for giant AGN-ionized clouds: past and present black hole accretion events
Schawinski, Kevin; Sonnenfeld, Alessandro; Keel, William C. +8 more
Some active galactic nuclei (AGN) are surrounded by extended emission-line regions (EELRs), which trace both the illumination pattern of escaping radiation and its history over the light travel time from the AGN to the gas. From a new set of such EELRs, we present evidence that the AGN in many Seyfert galaxies undergo luminous episodes 0.2-2 ? yea…
Observations of Herbig Ae/Be stars with Herschel/PACS. The atomic and molecular contents of their protoplanetary discs
Pinte, C.; Ménard, F.; Dent, W. R. F. +15 more
We observed a sample of 20 representative Herbig Ae/Be stars and 5 A-type debris discs with PACS onboard Herschel, as part of the GAS in Protoplanetary Systems (GASPS) project. The observations were done in spectroscopic mode, and cover the far-infrared lines of [O i], [C ii], CO, CH+, H2O, and OH. We have a [O i] 63 µm…
Dust temperature and CO → H2 conversion factor variations in the SFR-M∗ plane
Berta, S.; Magnelli, B.; Nordon, R. +15 more
Deep Herschel PACS/SPIRE imaging and 12CO(2-1) line luminosities from the IRAM Plateau de Bure Interferometer are combined for a sample of 17 galaxies at z > 1 from the GOODS-N field. The sample includes galaxies both on and above the main sequence (MS) traced by star-forming galaxies in the SFR-M∗ plane. The far-infrared …