Search Publications
Spectral and temporal properties of the supergiant fast X-ray transient IGR J18483-0311 observed by INTEGRAL
Santangelo, A.; Esposito, P.; Ducci, L. +4 more
Context. IGR J18483-0311 is a supergiant fast X-ray transient whose compact object is located in a wide (18.5 d) and eccentric (e ~ 0.4) orbit, which shows sporadic outbursts that reach X-ray luminosities of ~1036 erg s-1.
Aims: We investigated the timing properties of IGR J18483-0311 and studied the spectra during brigh…
Case study of a complex active-region filament eruption
Yan, X. L.; Xue, Z. K.; Kong, D. F. +2 more
Context. We investigated a solar active-region filament eruption associated with a C6.6 class flare and a coronal mass ejection (CME) in NOAA active region 08858 on 2000 February 9.
Aims: We aim to better understand the relationship between filament eruptions and the associated flares and CMEs.
Methods: Using BBSO, SOHO/EIT, and TRACE ob…
Deep multiband surface photometry on a sample of 24 blue compact galaxies. II. A volume-limited sample of 21 emission line galaxies
Östlin, G.; Zackrisson, E.; Bergvall, N. +6 more
Aims: We present deep surface photometry of a volume-limited sample of 21 UM emission line galaxies in broadband optical UBVRI and near infrared (NIR) HKs filters. The sample comprises 19 blue compact galaxies (BCGs) and two spirals.
Methods: We separated the burst and host populations for each galaxy and compared them to stellar evoluti…
Stellar population properties for a sample of hard X-ray AGNs
Minniti, D.; Masetti, N.; Parisi, P. +5 more
Aims: The aim of this paper is to study the stellar population of galaxies hosting an active galactic nucleus (AGN). We studied a subsample of hard X-ray emitting AGNs from the INTEGRAL and Swift catalogs, which were previously identified and characterized through optical spectroscopy. Our analysis provides complementary information, namely a…
Warm gas in protostellar outflows. I. Flows from the low-mass protostars in L1448 and HH211
Menten, K. M.; Güsten, R.; Leurini, S. +3 more
Context. Observations of CO rotational transitions in the 0.3-0.4 millimeter range, now possible from exceptional sites on the ground, provide the opportunity of studying the warm component of molecular outflows in star-forming regions.
Aims: This study aims to characterize the role of the warm gas in high-velocity and collimated outflows fro…
Five fake ultra-luminous X-ray sources
Gutiérrez, C. M.
Context. The nature of ultra-luminous X-ray (ULX) sources is still a matter of debate. Studies of their counterparts in other spectral ranges will help to clarify the nature of those sources.
Aims: Our goal was to identify and characterize the optical counterparts of five sources catalogued as ULXs.
Methods: We obtained optical imaging a…
Herschel observations of the debris disc around HIP 92043
Krivov, A. V.; Eiroa, C.; Löhne, T. +16 more
Context. Typical debris discs are composed of particles ranging from several micron sized dust grains to km sized asteroidal bodies, and their infrared emission peaks at wavelengths 60-100 µm. Recent Herschel DUNES observations have identified several debris discs around nearby Sun-like stars (F, G and K spectral type) with significant exces…
ODIN: a new model and ephemeris for the Pluto system
Colas, F.; Lainey, V.; Robert, V. +2 more
Because of Pluto's distance from the Sun, the Pluto system has not yet completed a revolution since its discovery, hence an uncertain heliocentric distance. In this paper, we present the fitting of our dynamical model ODIN (Orbite, Dynamique et Intégration Numérique) to observations. The small satellites P4 and P5 are not taken into account. We fi…
An XMM-Newton search for X-ray sources in the Fornax dwarf galaxy
Nucita, A. A.; De Paolis, F.; Ingrosso, G. +2 more
We report the results of a deep archive XMM-Newton observation of the Fornax spheroidal galaxy that we analyzed with the aim of fully characterizing the X-ray source population (in most of the cases likely to be background active galactic nuclei) detected towards the target. A cross correlation with the available databases allowed us to find a sou…
X-ray, optical, and infrared investigation of the candidate supergiant fast X-ray transient IGR J18462 - 0223
Masetti, N.; Sidoli, L.; Bird, A. J. +4 more
We report on a broad-band X-ray study (0.5-60 keV) of the poorly known candidate supergiant fast X-ray transient (SFXT) IGR J18462 - 0223, and on optical and near-infrared (NIR) followup observations of field objects. The out-of-outburst X-ray state has been investigated for the first time with archival INTEGRAL/IBIS, ASCA, Chandra, and Swift/XRT …