Search Publications
XMM-Newton observation of the interacting galaxies NGC 1512 and NGC 1510
Ducci, L.; Kavanagh, P. J.; Sasaki, M. +1 more
Context. The galaxy NGC 1512 is interacting with the smaller galaxy NGC 1510 and shows a peculiar morphology, characterised by two extended arms immersed in an HI disc whose size is about four times larger than the optical diameter of NGC 1512.
Aims: For the first time we performed a deep X-ray observation of the galaxies NGC 1512 and NGC 151…
Multifrequency analysis of the Jovian electron-belt radiation during the Cassini flyby of Jupiter
Sault, R. J.; Janssen, M. A.; Bolton, S. J. +3 more
Aims: We examine Very Large Array (VLA) observations of Jupiter to present evidence of fluctuations in the emission produced by the electron belt in January 2001. Investigating the source of fluctuations will provide new opportunities to discuss the scenarios of temporal changes in Jupiter's synchrotron radiation (i.e., the electron belt) in …
Luminosity function of low-mass X-ray binaries in the globular cluster system of NGC 1399
Maccarone, T. J.; Paolillo, M.; Fabbiano, G. +5 more
Aims: We present a study of the faint end of the X-ray luminosity function (XLF) of low-mass X-ray binaries (LMXBs) in the Globular Cluster (GC) system of the cD galaxy
Methods: We performed a stacking experiment on 618 X-ray undetected GCs, in order to verify the presence of faint LMXBs and to constrain the …
Seismic analysis of HD 43587Aa, a solar-like oscillator in a multiple system
Auvergne, M.; Baudin, F.; Chaintreuil, S. +26 more
Context. The object HD 43587Aa is a G0V star observed during the 145-day LRa03 run of the COnvection, ROtation and planetary Transits space mission (CoRoT), for which complementary High Accuracy Radial velocity Planet Searcher (HARPS) spectra with S/N > 300 were also obtained. Its visual magnitude is 5.71, and its effective temperature is close…
The counterpart/s of IGR J20159+3713/SWIFT J2015.9+3715: dissecting a complex region with emission from keV to TeV
Bird, A. J.; Ubertini, P.; Landi, R. +4 more
We report on the identification of a new soft gamma-ray source, namely IGR J20159+3713/SWIFT J2015.9+3715, first detected by INTEGRAL/IBIS and then confirmed by Swift/BAT. The source, which has an observed 20-100 keV flux in the range (0.7-1.4) × 10-11 erg cm-2 s-1, encloses a Fermi variable source (2FGL J2015.6+37…
The physical conditions in IRDC clumps from Herschel/HIFI observations of H2O
Shipman, R. F.; van der Tak, F. F. S.; Wyrowski, F. +2 more
Context. The earliest phases of high-mass star formation are poorly understood.
Aims: Our goal is to determine the physical conditions and kinematic structure of massive starforming cloud clumps.
Methods: We analyse H2O 557 GHz line profiles observed with HIFI toward four positions in two infrared-dark cloud clumps. By compari…
Stellar physical parameters from Strömgren photometry. Application to the young stars in the Galactic anticenter survey
Monguió, M.; Figueras, F.; Grosbøl, P.
Aims: The aim is to derive accurate stellar distances and extinctions for young stars of our survey in the Galactic anticenter direction using the Strömgren photometric system. This will allow a detailed mapping of the stellar density and absorption toward the Perseus arm.
Methods: We developed a new method for deriving physical paramete…
Dust temperature maps of the Galactic plane: The Herschel spectral energy distribution fitting with Cloudy predictions
Huang, Maohai; Zhu, Jiali
Context. Dust grains absorb the interstellar far ultra-violet and visible photons and re-emit them in far-infrared (FIR) wavebands. The dust FIR continuum can be predicted by a grid of models using various values of the interstellar radiation field.
Aims: We analyze the dust continuum emission in two Hi-GAL science-demonstration phase (SDP) f…
Quadrant asymmetry in the angular distribution of cosmic microwave background in the Planck satellite data
Vittorio, N.; Balbi, A.; Cabella, P. +3 more
Some peculiar features found in the angular distribution of the cosmic microwave background (CMB) measured by the Wilkinson Microwave Anisotropy Probe (WMAP) deserve further investigation. Among these peculiar features is the quadrant asymmetry, which is likely related to the north-south asymmetry. In this paper, we aim to extend the analysis of t…
Time-distance helioseismology: A new averaging scheme for measuring flow vorticity
Birch, A. C.; Gizon, L.; Langfellner, J.
Context. Time-distance helioseismology provides information about vector flows in the near-surface layers of the Sun by measuring wave travel times between points on the solar surface. Specific spatial averages of travel times have been proposed for distinguishing between flows in the east-west and north-south directions and measuring the horizont…