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A re-analysis of the NuSTAR and XMM-Newton broad-band spectrum of Serpens X-1
Sanna, A.; Di Salvo, T.; Burderi, L. +4 more
Context. High-resolution X-ray spectra of neutron star low-mass X-ray binaries (LMXBs) in the energy range 6.4-6.97 keV are often characterized by the presence of Kα transition features of iron at different ionization stages. Since these lines are thought to originate by reflection of the primary Comptonization spectrum over the accretion disk, th…
SCUBA-2 follow-up of Herschel-SPIRE observed Planck overdensities
Clements, David L.; Lagache, Guilaine; Scott, Douglas +11 more
We present SCUBA-2 follow-up of 61 candidate high-redshift Planck sources. Of these, 10 are confirmed strong gravitational lenses and comprise some of the brightest such submm sources on the observed sky, while 51 are candidate proto-cluster fields undergoing massive starburst events. With the accompanying Herschel-Spectral and Photometric Imaging…
The Infrared and Radio Flux Densities of Galactic H II regions
Makai, Z.; Anderson, L. D.; Mascoop, J. L. +1 more
We derive infrared and radio flux densities of all ∼1000 known Galactic H II regions in the Galactic longitude range 17\buildrel{\circ}\over{.} 5< {\ell }< 65^\circ . Our sample comes from the Wide-Field Infrared Survey Explorer (WISE) catalog of Galactic H II regions. We compute flux densities at six wavelengths in the infrared (Spitzer GLI…
(Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. IV. Physical properties derived from spectral energy distributions
Ilbert, O.; Smolčić, V.; Murphy, E. J. +10 more
Context. Submillimetre galaxies (SMGs) in the early Universe are potential antecedents of the most massive galaxies we see in the present-day Universe. An important step towards quantifying this galactic evolutionary connection is to investigate the fundamental physical properties of SMGs, such as their stellar mass content (M⋆) and sta…
Observations of the Coronal Mass Ejection with a Complex Acceleration Profile
Reva, A. A.; Kirichenko, A. S.; Ulyanov, A. S. +1 more
We study the coronal mass ejection (CME) with a complex acceleration profile. The event occurred on 2009 April 23. It had an impulsive acceleration phase, an impulsive deceleration phase, and a second impulsive acceleration phase. During its evolution, the CME showed signatures of different acceleration mechanisms: kink instability, prominence dra…
Studying the accretion geometry of EXO 2030+375 at luminosities close to the propeller regime
Wilms, J.; Pottschmidt, K.; Kretschmar, P. +10 more
The Be X-ray binary EXO 2030+375was in an extended low-luminosity state during most of 2016. We observed this state with NuSTARand Swift, supported by INTEGRALobservations and optical spectroscopy with the Nordic Optical Telescope (NOT). We present a comprehensive spectral and timing analysis of these data here to study the accretion geometry and …
The extremely metal-poor galaxy DDO 68: the luminous blue variable, Hα shells and the most luminous stars
Moiseev, A. V.; Makarova, L. N.; Makarov, D. I. +2 more
This paper presents new results from the ongoing study of the unusual Lynx-Cancer void galaxy DDO 68, which has star-forming regions of record low metallicity [12+log (O/H) ∼7.14]. The results include the following. (I) A new spectrum and photometry have been obtained with the 6-m SAO RAS telescope (BTA) for the luminous blue variable (LBV = DDO68…
Possible regular phenomena in EXO 2030+375
Makishima, Kazuo; Santangelo, Andrea; Moritani, Yuki +4 more
In the last 10 yr, since its last giant outburst in 2006, regular X-ray outbursts (type I) were detected every periastron passage in the Be X-ray binary EXO 2030+375. Recently, however, it was reported that the source started to show a peculiar behavior: its X-ray flux decreased significantly and type I outbursts were missed in several cases. At t…
The accretion environment of supergiant fast X-ray transients probed with XMM-Newton
Bernardini, F.; Romano, P.; Ferrigno, C. +3 more
Context. Supergiant fast X-ray (SFXT) transients are a peculiar class of supergiant X-ray binaries characterized by a remarkable variability in the X-ray domain, widely ascribed to accretion from a clumpy stellar wind.
Aims: In this paper we performed a systematic and homogeneous analysis of the sufficiently bright X-ray flares observed with …
Stepwise heating of lunar anorthosites 60025, 60215, 65315 possibly reveals an indigenous noble gas component on the Moon
Gudipati, Murthy S.; Avice, Guillaume; Henderson, Bryana +2 more
Despite extensive effort during the last four decades, no clear signature of a lunar indigenous noble gas component has been found. In order to further investigate the possible occurrence of indigenous volatiles in the Moon, we have re-analyzed the noble gas and nitrogen isotopic compositions in three anorthosite samples. Lunar anorthosites 60025,…