Search Publications
A rigorous detection of interstellar CH3NCO: An important missing species in astrochemical networks
Cernicharo, J.; Tercero, B.; Guillemin, J. -C. +8 more
The recent analysis of the composition of the frozen surface of comet 67P/Churyumov-Gerasimenko has revealed a significant number of complex organic molecules. Methyl isocyanate (CH3NCO) is one of the more abundant species detected on the comet surface. In this work we report extensive characterization of its rotational spectrum resulti…
Version 1 of the Hubble Source Catalog
Casertano, Stefano; White, Richard L.; Whitmore, Bradley C. +9 more
The Hubble Source Catalog is designed to help optimize science from the Hubble Space Telescope (HST) by combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive (HLA) into a single master catalog. Version 1 of the Hubble Source Catalog includes WFPC2, ACS/WFC, WFC3/UVIS, and WFC3/IR photometric data generated using …
The brighter galaxies reionized the Universe
Schaye, Joop; Theuns, Tom; Frenk, Carlos +4 more
Hydrogen in the Universe was (re)ionized between redshifts z ≈ 10 and z ≈ 6. The nature of the sources of the ionizing radiation is hotly debated, with faint galaxies below current detection limits regarded as prime candidates. Here, we consider a scenario in which ionizing photons escape through channels punctured in the interstellar medium by ou…
The MIXR sample: AGN activity versus star formation across the cross-correlation of WISE, 3XMM, and FIRST/NVSS
Hardcastle, M. J.; Pineau, F. -X.; Blain, A. +7 more
We cross-correlate the largest available mid-infrared (Wide-field Infrared Survey Explorer - WISE), X-ray (3XMM) and radio (Faint Images of the Radio Sky at Twenty centimetres+NRAO VLA Sky Survey) catalogues to define the MIXR sample of AGN and star-forming galaxies. We pre-classify the sources based on their positions on the WISE colour/colour pl…
On the Fermi-GBM Event 0.4 s after GW150914
Burgess, J. M.; Greiner, J.; Savchenko, V. +1 more
In view of the recent report by Connaughton et al., we analyze continuous time-tagged event (TTE) data of Fermi-gamma-ray burst monitor (GBM) around the time of the gravitational-wave event GW 150914. We find that after proper accounting for low-count statistics, the GBM transient event at 0.4 s after GW 150914 is likely not due to an astrophysica…
Highly relativistic radiation belt electron acceleration, transport, and loss: Large solar storm events of March and June 2015
Baker, D. N.; Kanekal, S. G.; Zhao, H. +12 more
Two of the largest geomagnetic storms of the last decade were witnessed in 2015. On 17 March 2015, a coronal mass ejection-driven event occurred with a Dst (storm time ring current index) value reaching -223 nT. On 22 June 2015 another strong storm (Dst reaching -204 nT) was recorded. These two storms each produced almost total loss of radiation b…
A path towards understanding the rotation-activity relation of M dwarfs with K2 mission, X-ray and UV data
Scholz, A.; Damasso, M.; Stelzer, B. +1 more
We study the relation between stellar rotation and magnetic activity for a sample of 134 bright, nearby M dwarfs observed in the Kepler Two-Wheel (K2) mission during campaigns C0-C4. The K2 light curves yield photometrically derived rotation periods for 97 stars (79 of which without previous period measurement), as well as various measures for act…
Detection of exposed H2O ice on the nucleus of comet 67P/Churyumov-Gerasimenko. as observed by Rosetta OSIRIS and VIRTIS instruments
Jorda, L.; Lamy, P. L.; Bertaux, J. -L. +63 more
Context. Since the orbital insertion of the Rosetta spacecraft, comet 67P/Churyumov-Gerasimenko (67P) has been mapped by OSIRIS camera and VIRTIS spectro-imager, producing a huge quantity of images and spectra of the comet's nucleus.
Aims: The aim of this work is to search for the presence of H2O on the nucleus which, in general, a…
The disappearance of the helium-giant progenitor of the Type Ib supernova iPTF13bvn and constraints on its companion
Maund, J. R.; Eldridge, J. J.
We report and discuss post-explosion observations of supernova iPTF13bvn. We find that the brightness of the supernova (SN) at +740 d is below the level of the pre-explosion source and thus confirm that the progenitor has exploded. We estimate that the late-time brightness is still dominated by the SN, which constrains the magnitude and thus mass …
Towards universal hybrid star formation rate estimators
Boquien, M.; De Looze, I.; Pellegrini, E. +13 more
Context. To compute the star formation rate (SFR) of galaxies from the rest-frame ultraviolet (UV), it is essential to take the obscuration by dust into account. To do so, one of the most popular methods consists in combining the UV with the emission from the dust itself in the infrared (IR). Yet, different studies have derived different estimator…