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Polarization and long-term variability of Sgr A* X-ray echo
Sunyaev, R.; Churazov, E.; Ponti, G. +1 more
We use a model of the molecular gas distribution within ∼100 pc from the centre of the Milky Way (Kruijssen, Dale & Longmore) to simulate time evolution and polarization properties of the reflected X-ray emission, associated with the past outbursts from Sgr A*. While this model is too simple to describe the complexity of the true gas distribut…
The ASTRODEEP Frontier Fields catalogues. III. Multiwavelength photometry and rest-frame properties of MACS-J0717 and MACS-J1149
Elbaz, D.; McLure, R. J.; Dunlop, J. S. +14 more
Aims: We present the multiwavelength photometry of two Frontier Fields massive galaxy clusters, MACS-J0717 and MACS-J1149, and their parallel fields, ranging from Hubble Space Telescope (HST) to ground-based K and Spitzer IRAC bands, and the public release of photometric redshifts and rest-frame properties of galaxies found in cluster and par…
Reformation of rippled quasi-parallel shocks: 2-D hybrid simulations
Wang, Shui; Huang, Can; Hao, Yufei +3 more
One-dimensional (1-D) hybrid simulations have demonstrated that a quasi-parallel shock is nonstationary and undergoes a reformation process. Recently, two-dimensional (2-D) hybrid simulations have revealed that ripples along the shock front is an inherent property of a quasi-parallel shock. In this paper, we investigate reformation process of a ri…
Binaries among low-mass stars in nearby young moving groups
Henning, Thomas; Brandner, Wolfgang; Schlieder, Joshua +5 more
The solar galactic neighborhood contains a number of young co-moving associations of stars (known as young moving groups) with ages of 10-150 Myr, which are prime targets for a range of scientific studies, including direct imaging planet searches. The late-type stellar populations of such groups still remain in their pre-main sequence phase, and a…
HADES RV Programme with HARPS-N at TNG. V. A super-Earth on the inner edge of the habitable zone of the nearby M dwarf GJ 625
Rebolo, R.; Ribas, I.; Morales, J. C. +27 more
We report the discovery of a super-Earth orbiting at the inner edge of the habitable zone of the star GJ 625 based on the analysis of the radial-velocity (RV) time series from the HARPS-N spectrograph, consisting of 151 HARPS-N measurements taken over 3.5 yr. GJ 625 b is a planet with a minimum mass Msini of 2.82 ± 0.51 M⊕ with an orbit…
A decade of warm hot intergalactic medium searches: Where do we stand and where do we go?
Elvis, M.; Nicastro, F.; Krongold, Y. +1 more
In this article, we first review the past decade of efforts in detecting the missing baryons in the warm hot intergalactic medium and summarize the current state of the art by updating the baryon census and physical state of the detected baryons in the local Universe. We then describe observational strategies that should enable a significant step …
Onset of a Large Ejective Solar Eruption from a Typical Coronal-jet-base Field Configuration
Moon, Yong-Jae; Joshi, Navin Chandra; Magara, Tetsuya +2 more
Utilizing multiwavelength observations and magnetic field data from the Solar Dynamics Observatory (SDO)/Atmospheric Imaging Assembly (AIA), SDO/Helioseismic and Magnetic Imager (HMI), the Geostationary Operational Environmental Satellite (GOES), and RHESSI, we investigate a large-scale ejective solar eruption of 2014 December 18 from active regio…
Spectral and timing properties of IGR J00291+5934 during its 2015 outburst
Sanna, A.; Egron, E.; Ferrigno, C. +8 more
We report on the spectral and timing properties of the accreting millisecond X-ray pulsar IGR J00291+5934 observed by XMM-Newton and NuSTAR during its 2015 outburst. The source is in a hard state dominated at high energies by a Comptonization of soft photons (∼0.9 keV) by an electron population with kTe ∼ 30 keV, and at lower energies b…
NGC 1566: analysis of the nuclear region from optical and near-infrared Integral Field Unit spectroscopy
Steiner, J. E.; Menezes, R. B.; da Silva, Patrícia
We analysed the centre of NGC 1566, which hosts a well-studied active galactic nucleus (AGN), known for its variability. With the aid of techniques such as Principal Component Analysis Tomography, analysis of the emission-line spectra, channel maps, Penalized Pixel Fitting and spectral synthesis applied to the optical and near-infrared data cubes,…
Lens Model and Time Delay Predictions for the Sextuply Lensed Quasar SDSS J2222+2745
Rigby, Jane R.; Whitaker, Katherine E.; Sharon, Keren +7 more
SDSS J2222+2745 is a galaxy cluster at z = 0.49, strongly lensing a quasar at z = 2.805 into six widely separated images. In recent Hubble Space Telescope imaging of the field, we identify additional multiply lensed galaxies and confirm the sixth quasar image that was identified by Dahle et al. We used the Gemini-North telescope to measure a spect…