Search Publications
The HerMES submillimetre local and low-redshift luminosity functions
Aussel, H.; Pérez-Fournon, I.; Valtchanov, I. +43 more
We used wide-area surveys over 39 deg2 by the HerMES (Herschel Multi-tiered Extragalactic Survey) collaboration, performed with the Herschel Observatory SPIRE multiwavelength camera, to estimate the low-redshift, 0.02 < z < 0.5, monochromatic luminosity functions (LFs) of galaxies at 250, 350 and 500 µm. Within this redshift…
X-ray detection of warm ionized matter in the Galactic halo
Piro, L.; Guainazzi, M.; Elvis, M. +5 more
We report on a systematic investigation of the cold and mildly ionized gaseous baryonic metal components of our Galaxy, through the analysis of high-resolution Chandra and XMM-Newton spectra of two samples of Galactic and extragalactic sources. The comparison between lines of sight towards sources located in the disc of our Galaxy and extragalacti…
Broad-band spectral analysis of the accreting millisecond X-ray pulsar SAX J1748.9-2021
Sanna, A.; Di Salvo, T.; Burderi, L. +6 more
We analysed a 115-ks XMM-Newton observation and the stacking of 8 d of INTEGRAL observations, taken during the raise of the 2015 outburst of the accreting millisecond X-ray pulsar SAX J1748.9-2021. The source showed numerous type-I burst episodes during the XMM-Newton observation, and for this reason we studied separately the persistent and burst …
Origin of the local structures at the Philae landing site and possible implications on the formation and evolution of 67P/Churyumov-Gerasimenko
Bibring, J. -P.; Gondet, B.; Langevin, Y. +7 more
In situ images of the 67P/Churyumov-Gerasimenko nucleus acquired by the CIVA cameras on-board PHILAE revealed a rough landscape dominated by consolidated materials. These data provide a unique view to constrain the past and present conditions prevailing at the surface of the comet. A quantitative analysis of microscopic structures (fractures and p…
High-energy monitoring of NGC 4593 with XMM-Newton and NuSTAR. X-ray spectral analysis
Bianchi, S.; Cappi, M.; Ponti, G. +8 more
We present results from a joint XMM-Newton/NuSTAR monitoring of the Seyfert 1 NGC 4593, consisting of 5 × 20 ks simultaneous observations spaced by 2 d, performed in 2015 January. The source is variable, both in flux and spectral shape, on time-scales down to a few ks and with a clear softer-when-brighter behaviour. In agreement with past observat…
CME impact on comet 67P/Churyumov-Gerasimenko
Glassmeier, K. -H.; Behar, E.; Möstl, C. +23 more
We present Rosetta observations from comet 67P/Churyumov-Gerasimenko during the impact of a coronal mass ejection (CME). The CME impacted on 2015 Oct 5-6, when Rosetta was about 800 km from the comet nucleus, and 1.4 au from the Sun. Upon impact, the plasma environment is compressed to the level that solar wind ions, not seen a few days earlier wh…
Star formation laws in the Andromeda galaxy: gas, stars, metals and the surface density of star formation
Barmby, P.; Lianou, S.; Rahmani, S.
We use hierarchical Bayesian regression analysis to investigate star formation laws in the Andromeda galaxy (M31) in both local (30, 155 and 750 pc) and global cases. We study and compare the well-known Kennicutt-Schmidt law, the extended Schmidt law and the metallicity/star formation correlation. Using a combination of Hα and 24 µm emission…
Testing light-traces-mass in Hubble Frontier Fields Cluster MACS-J0416.1-2403
Liesenborgs, Jori; Mohammed, Irshad; Saha, Prasenjit +2 more
We reconstruct the projected mass distribution of a massive merging Hubble Frontier Fields cluster MACSJ0416 using the genetic algorithm based free-form technique called Grale. The reconstructions are constrained by 149 lensed images identified by Jauzac et al. using HFF data. No information about cluster galaxies or light is used, which makes our…
Suzaku view of the Be/X-ray binary pulsar GX 304-1 during Type I X-ray outbursts
Naik, Sachindra; Jaisawal, Gaurava K.; Epili, Prahlad
We report the timing and spectral properties of the Be/X-ray binary pulsar GX 304-1 using two Suzaku observations during its 2010 August and 2012 January X-ray outbursts. Pulsations at ∼275 s were clearly detected in the light curves from both observations. Pulse profiles were found to be strongly energy-dependent. During the 2010 observation, the…
Statistical properties of dwarf novae-type cataclysmic variables: the outburst catalogue
Drake, Andrew J.; Coppejans, Deanne L.; Knigge, Christian +5 more
The outburst catalogue contains a wide variety of observational properties for 722 dwarf nova (DN)-type cataclysmic variables (CVs) and 309 CVs of other types from the Catalina Real-time Transient Survey. In particular, it includes the apparent outburst and quiescent V-band magnitudes, duty cycles, limits on the recurrence time, upper and lower li…