Search Publications
Starbursts and dusty tori in distant 3CR radio galaxies
Barthel, Peter; Drouart, Guillaume; Podigachoski, Pece +2 more
We present a study of the complete ultraviolet to submillimetre spectral energy distributions (SEDs) of 12 3CR radio galaxy hosts in the redshift range 1.0 < z < 2.5, which were all detected in the far-infrared by the Herschel Space Observatory. The study employs the new spectro-chemical evolutionary code PÉGASE.3, in combination with recent…
The Tale of the Two Tails of the Oldish PSR J2055+2539
De Luca, Andrea; Caraveo, Patrizia; Marelli, Martino +3 more
We analyzed a deep XMM-Newton observation of the radio-quiet γ-ray PSR J2055+2539. The spectrum of the X-ray counterpart is nonthermal, with a photon index of Γ = 2.36 ± 0.14 (1σ confidence). We detected X-ray pulsations with a pulsed fraction of 25% ± 3% and a sinusoidal shape. Taking into account considerations on the γ-ray efficiency of the pul…
Genesis of Interplanetary Intermittent Turbulence: A Case Study of Rope&enrope Magnetic Reconnection
Miranda, Rodrigo A.; Chian, Abraham C. -L.; Muñoz, Pablo R. +5 more
In a recent paper, the relation between current sheet, magnetic reconnection, and turbulence at the leading edge of an interplanetary coronal mass ejection was studied. We report here the observation of magnetic reconnection at the interface region of two interplanetary magnetic flux ropes. The front and rear boundary layers of three interplanetar…
Dipole modulation of cosmic microwave background temperature and polarization
Ghosh, Shamik; Kothari, Rahul; Jain, Pankaj +1 more
We propose a dipole modulation model for the Cosmic Microwave Background Radiation (CMBR) polarization field. We show that the model leads to correlations between l and l+1 multipoles, exactly as in the case of temperature. We obtain results for the case of TE, EE and BB correlations. An anisotropic or inhomogeneous model of primordial power spect…
Searching for filaments and large-scale structure around DAFT/FADA clusters
Adami, C.; Martinet, N.; Durret, F. +6 more
Context. Clusters of galaxies are located at the intersection of cosmic filaments and are still accreting galaxies and groups along these preferential directions. However, because of their relatively low contrast on the sky, filaments are difficult to detect (unless a large amount of spectroscopic data are available), and unambiguous detections ha…
The First High-phase Observations of a KBO: New Horizons Imaging of (15810) 1994 JR1 from the Kuiper Belt
Olkin, Cathy B.; Stern, S. Alan; Young, Leslie A. +12 more
NASA’s New Horizons spacecraft observed (15810) 1994 JR1, a 3:2 resonant Kuiper belt object (KBO), using the LOng Range Reconnaissance Imager (LORRI) on 2015 November 2 from a distance of 1.85 au and again on 2016 April 7 from a distance of 0.71 au. These were the first close observations of any KBO other than Pluto. Combining ground-ba…
Probing the statistical properties of CMB B-mode polarization through Minkowski functionals
Wang, Kai; Santos, Larissa; Zhao, Wen
The detection of the magnetic type B-mode polarization is the main goal of future cosmic microwave background (CMB) experiments. In the standard model, the B-mode map is a strong non-gaussian field due to the CMB lensing component. Besides the two-point correlation function, the other statistics are also very important to dig the information of th…
High spatial resolution optical imaging of the multiple T Tauri system Lk Hα 262/Lk Hα 263
Rebolo, R.; Labadie, L.; Velasco, S. +12 more
We report high spatial resolution I' band imaging of the multiple T Tauri system LkHα 262/LkHα 263 obtained during the first commissioning period of the Adaptive Optics Lucky Imager (AOLI) at the 4.2-m William Herschel Telescope, using its Lucky Imaging mode. AOLI images have provided photometry for each of the two components LkHα 263 A and B (0.4…
Survival of Pure Disk Galaxies over the Last 8 Billion Years
Sachdeva, Sonali; Saha, Kanak
Pure disk galaxies without any bulge component, I.e., bulges that are neither classical nor pseudo, seem to have escaped the effects of merger activity that are inherent to hierarchical galaxy formation models as well as strong internal secular evolution. We discover that a significant fraction (∼15%-18%) of disk galaxies in the Hubble Deep Field …
AKARI/IRC Near-infrared Spectral Atlas of Galactic Planetary Nebulae
Onaka, Takashi; Matsuura, Mikako; Sakon, Itsuki +2 more
Near-infrared (2.5-5.0 µm) low-resolution (λ/Δλ ∼ 100) spectra of 72 Galactic planetary nebulae (PNe) were obtained with the Infrared Camera (IRC) in the post-helium phase. The IRC, equipped with a 1‧ × 1‧ window for spectroscopy of a point source, was capable of obtaining near-infrared spectra in a slit-less mode without any flux loss due t…