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The dust properties of bubble H II regions as seen by Herschel
Abergel, A.; Bernard, J. -P.; Hill, T. +10 more
Context. Because of their relatively simple morphology, "bubble" H II regions have been instrumental to our understanding of star formation triggered by H II regions. With the far-infrared (FIR) spectral coverage of the Herschel satellite, we can access the wavelengths where these regions emit the majority of their energy through their dust emissi…
The Evolution of Mass-Size Relation for Lyman Break Galaxies from z = 1 to z = 7
Franx, Marijn; Illingworth, Garth D.; Bouwens, Rychard J. +6 more
For the first time, we study the evolution of the stellar mass-size relation for star-forming galaxies from z ~ 4 to z ~ 7 from Hubble-WFC3/IR camera observations of the HUDF and Early Release Science field. The sizes are measured by determining the best-fit model to galaxy images in the rest-frame 2100 Å with the stellar masses estimated from spe…
The size-luminosity relation at z = 7 in CANDELS and its implication on reionization
Ferguson, H. C.; Giavalisco, M.; McLure, R. J. +15 more
Context. The exploration of the relation between galaxy sizes and other physical parameters (luminosity, mass, star formation rate) has provided important clues for understanding galaxy formation, but such exploration has until recently been limited to intermediate redshift objects.
Aims: We use the currently available CANDELS Deep+Wide surve…
Spectral analysis of 1H 0707-495 with XMM-Newton
Schartel, N.; Santos-Lleó, M.; Ehle, M. +6 more
We present the results of a 500 ks long XMM-Newton observation and a 120 ks long quasi-simultaneous Chandra observation of the Narrow-Line Seyfert 1 galaxy 1H 0707-495 performed in 2010 September. Consistent with earlier results by Fabian et al. and Zoghbi et al., the spectrum is found to be dominated by relativistically broadened reflection featu…
A Double Main Sequence in the Globular Cluster NGC 6397
Anderson, J.; Milone, A. P.; Marino, A. F. +5 more
High-precision multi-band Hubble Space Telescope (HST) photometry reveals that the main sequence of the globular cluster NGC 6397 splits into two components, containing ~30% and ~70% of the stars. This double sequence is consistent with the idea that the cluster hosts two stellar populations: (1) a primordial population that has a composition simi…
The XMM-Newton serendipitous ultraviolet source survey catalogue
Talavera, A.; Page, M. J.; Cropper, M. S. +11 more
The XMM-Newton Serendipitous Ultraviolet Source Survey (XMM-SUSS) is a catalogue of ultraviolet (UV) sources detected serendipitously by the Optical Monitor (XMM-OM) on board the XMM-Newton observatory. The catalogue contains UV-detected sources collected from 2417 XMM-OM observations in one to six broad-band UV and optical filters, made between 2…
Magnetospheric configuration and dynamics of Saturn's magnetosphere: A global MHD simulation
Hansen, Kenneth C.; Gombosi, Tamas I.; Kivelson, Margaret G. +4 more
We investigate the solar wind interaction with Saturn's magnetosphere by using a global magnetohydrodynamic simulation driven by an idealized time-varying solar wind input that includes features of Corotating Interaction Regions typically seen at Saturn. Our model results indicate that the compressibility of Saturn's magnetosphere is intermediate …
[C II] 158 µm Luminosities and Star Formation Rate in Dusty Starbursts and Active Galactic Nuclei
Lebouteiller, V.; Engels, D.; Stacey, G. +8 more
Results are presented for [C II] 158 µm line fluxes observed with the Herschel PACS instrument in 112 sources with both starburst and active galactic nucleus (AGN) classifications, of which 102 sources have confident detections. Results are compared with mid-infrared spectra from the Spitzer Infrared Spectrometer and with L ir fro…
The UVJ Selection of Quiescent and Star-forming Galaxies: Separating Early- and Late-type Galaxies and Isolating Edge-on Spirals
Franx, Marijn; Kelson, Daniel D.; Illingworth, Garth D. +3 more
We utilize for the first time Hubble Space Telescope Advanced Camera for Surveys imaging to examine the structural properties of galaxies in the rest-frame U - V versus V - J diagram (i.e., the UVJ diagram) using a sample at 0.6 < z < 0.9 that reaches a low stellar mass limit (log M/M ⊙ >10.25). The use of the UVJ diagram as a …
Remote and in situ observations of an unusual Earth-directed coronal mass ejection from multiple viewpoints
Anderson, B. J.; Szabo, A.; Nieves-Chinchilla, T. +5 more
During June 16-21, 2010, an Earth-directed coronal mass ejection (CME) event was observed by instruments onboard STEREO, SOHO, MESSENGER and Wind. This event was the first direct detection of a rotating CME in the middle and outer corona. Here, we carry out a comprehensive analysis of the evolution of the CME in the interplanetary medium comparing…