Search Publications
INTEGRAL View on cataclysmic variables and symbiotic binaries
Doroshenko, Victor; de Martino, Domitilla; Falanga, Maurizio +5 more
Accreting white dwarfs (WDs) constitute a significant fraction of the hard X-ray sources detected by the INTEGRAL observatory. Most of them are magnetic Cataclysmic Variables (CVs) of the intermediate polar (IP) and polar types, but the contribution of the Nova-likes systems and the systems with optically thin boundary layers, Dwarf Novae (DNs) an…
The Galactic LMXB Population and the Galactic Centre Region
Krivonos, R.; Sazonov, S.; Wilms, J. +21 more
Seventeen years of hard X-ray observations with the instruments of the INTEGRAL observatory, with a focus on the Milky Way and in particular on the Galactic Centre region, have provided a unique database for exploration of the Galactic population of low-mass X-ray binaries (LMXBs). Our understanding of the diverse energetic phenomena associated wi…
INTEGRAL results on the electron-positron annihilation radiation and X-ray & Gamma-ray diffuse emission of the Milky Way
Churazov, Eugene; Sunyaev, Rashid; Knödlseder, Jürgen +8 more
This review summarizes INTEGRAL results on two topics: the electron-positron annihilation line and X-ray & Gamma-ray diffuse emission of the Milky Way.
The electron-positron annihilation line at 511 keV is the most prominent spectral feature in the gamma-ray spectrum of the Milky Way. From the observational perspective, INTEGRAL has alrea…The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars
Tiengo, A.; Götz, D.; Mereghetti, S. +30 more
In the last 25 years a new generation of X-ray satellites imparted a significant leap forward in our knowledge of X-ray pulsars. The discovery of accreting and transitional millisecond pulsars proved that disk accretion can spin up a neutron star to a very high rotation speed. The detection of MeV-GeV pulsed emission from a few hundreds of rotatio…
INTEGRAL view of AGN
Pian, Elena; Sazonov, Sergey; Bassani, Loredana +5 more
AGN are among the most energetic phenomena in the Universe and in the last two decades INTEGRAL's contribution in their study has had a significant impact. Thanks to the INTEGRAL extragalactic sky surveys, all classes of soft X-ray detected (in the 2-10 keV band) AGN have been observed at higher energies as well. Up to now, around 450 AGN have bee…
Advances in Understanding High-Mass X-ray Binaries with INTEGRALand Future Directions
Torres, Diego F.; Li, Jian; Rothschild, Richard E. +48 more
High mass X-ray binaries are among the brightest X-ray sources in the Milky Way, as well as in nearby Galaxies. Thanks to their highly variable emissions and complex phenomenology, they have attracted the interest of the high energy astrophysical community since the dawn of X-ray Astronomy. In more recent years, they have challenged our comprehens…
Surviving companions of Type Ia supernovae: theory and observations
Ruiz-Lapuente, Pilar
We review the theoretical background and the observational searches made for surviving companions of Type Ia supernovae (SNe Ia). Theory comprises the characteristics of the stellar binary companions of the exploding white dwarfs at the time of the supernova outburst and the expected effects on them of the explosion, as well as their subsequent ev…
INTEGRAL results on gamma-ray bursts and polarization of hard X-ray sources
Mereghetti, Sandro; Götz, Diego; Laurent, Philippe +9 more
In this paper we first review the results obtained by the INTEGRAL mission in the domain of Gamma-Ray Bursts (GRBs), thanks to the INTEGRAL Burst Alert System, which is able to deliver near real-time alerts for GRBs detected within the IBIS field of view. More than 120 GRBs have been detected to date and we summarize their properties here. In the …
The State-of-Play of Anomalous Microwave Emission (AME) research
Leahy, J. P.; Paladini, R.; Poidevin, F. +30 more
Anomalous Microwave Emission (AME) is a component of diffuse Galactic radiation observed at frequencies in the range ≈ 10-60 GHz. AME was first detected in 1996 and recognised as an additional component of emission in 1997. Since then, AME has been observed by a range of experiments and in a variety of environments. AME is spatially correlated wit…
Kepler-62f: Kepler's first small planet in the habitable zone, but is it real?
Hedges, Christina; Agol, Eric; Borucki, William +1 more
Kepler-62f is the first exoplanet small enough to plausibly have a rocky composition orbiting within the habitable zone (HZ) discovered by the Kepler Mission. The planet is 1.4 times the size of the Earth and has an orbital period of 267 days. At the time of its discovery, it had the longest period of any small planet in the habitable zone of a mu…