Search Publications
Imaging the circumstellar environment of the young T Tauri star SU Aurigae
Jeffers, S. V.; Min, M.; Canovas, H. +2 more
The circumstellar environments of classical T Tauri stars are challenging to directly image because of their high star-to-disk contrast ratio. One method to overcome this is by using imaging polarimetry where scattered and consequently polarised starlight from the star's circumstellar disk can be separated from the unpolarised light of the central…
Herschel observations of gas and dust in comet C/2006 W3 (Christensen) at 5 AU from the Sun
de Graauw, Th.; Lara, L. M.; Küppers, M. +19 more
Context. Cometary activity at large heliocentric distances is thought to be driven by outgassing of molecular species more volatile than water that are present in the nucleus. The long-period comet C/2006 W3 (Christensen) was an exceptional target for a detailed study of its distant gaseous and dust activity.
Aims: We aimed to measure the H
Polar and Equatorial Coronal Hole Winds at Solar Minima: From the Heliosphere to the Inner Corona
Zhao, L.; Landi, E.
Fast solar wind can be accelerated from at least two different sources: polar coronal holes and equatorial coronal holes. Little is known about the relationship between the wind coming from these two different latitudes and whether these two subcategories of fast wind evolve in the same way during the solar cycle. Nineteen years of Ulysses observa…
A Challenging Solar Eruptive Event of 18 November 2003 and the Causes of the 20 November Geomagnetic Superstorm. III. Catastrophe of the Eruptive Filament at a Magnetic Null Point and Formation of an Opposite-Handedness CME
Grechnev, V. V.; Chertok, I. M.; Uralov, A. M. +4 more
Our analysis in Papers I and II (Grechnev et al., Solar Phys.289, 289, 2014b and Solar Phys.289, 1279, 2014c) of the 18 November 2003 solar event responsible for the 20 November geomagnetic superstorm has revealed a complex chain of eruptions. In particular, the eruptive filament encountered a topological discontinuity located near the solar disk …
Suzaku study of gas properties along filaments of A2744
Zhang, Y. -Y.; Finoguenov, A.; Akamatsu, H. +2 more
Context. We present the results of Suzaku observations of a massive galaxy cluster
Aims: By using long X-ray observations of
Discovery of large-scale diffuse radio emission and of a new galaxy cluster in the surroundings of MACS J0520.7-1328
Pratt, G. W.; Bartalucci, I.; Kale, R. +11 more
We report the discovery of large-scale diffuse radio emission south-east of the galaxy cluster
A hydrological analysis of terrestrial and Martian gullies: Implications for liquid water on Mars
Hobbs, S. W.; Paull, D. J.; Clarke, J. D. A.
Understanding the role and amounts of liquid water involved in Martian gully formation is critical in studies of the Martian hydrosphere and climate. We performed hydrological analyses using the Manning and Darcy-Weisbach equations in order to infer flow velocities and discharge rates from channels at two gully sites in Noachis Terra, Mars. The re…
Philae probe makes bumpy touchdown on a comet
Hand, Eric
Rest-frame ultraviolet spectra of massive galaxies at z ~ 3: evidence of high-velocity outflows
Almaini, Omar; Caputi, Karina I.; Trager, Scott C. +2 more
Galaxy formation models invoke the presence of strong feedback mechanisms that regulate the growth of massive galaxies at high redshifts. Providing observational evidence of these processes is crucial to justify and improve these prescriptions. In this paper we aim to (1) confirm spectroscopically the redshifts of a sample of massive galaxies sele…
Another Short-burst Host Galaxy with an Optically Obscured High Star Formation Rate: The Case of GRB 071227
Palazzi, E.; Greiner, J.; Hunt, L. K. +9 more
We report on radio continuum observations of the host galaxy of the short gamma-ray burst 071227 (z = 0.381) with the Australia Telescope Compact Array. We detect the galaxy in the 5.5 GHz band with an integrated flux density of F ν = 43 ± 11 µJy, corresponding to an unobscured star-formation rate of about 24 M ⊙ yr