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XMM-Newton study of 30 Doradus C and a newly identified MCSNR J0536-6913 in the Large Magellanic Cloud⋆
Haberl, F.; Filipović, M. D.; Maggi, P. +4 more
Aims: We present a detailed study of the superbubble 30 Dor C and the newly identified supernova remnant MCSNR J0536-6913 in the Large Magellanic Cloud.
Methods: All available XMM-Newton data (flare-filtered exposure times of 420 ks EPIC-pn, 556 ks EPIC-MOS1, 614 ks EPIC-MOS2) were used to characterise the thermal X-ray emission in the r…
Tracing the Magnetic Field Morphology of the Lupus I Molecular Cloud
Franco, G. A. P.; Alves, F. O.
Deep R-band CCD linear polarimetry collected for fields with lines of sight toward the Lupus I molecular cloud is used to investigate the properties of the magnetic field within this molecular cloud. The observed sample contains about 7000 stars, almost 2000 of them with a polarization signal-to-noise ratio larger than 5. These data cover almost t…
A Revised Sensitivity Model for Cassini INMS: Results at Titan
Young, D. T.; Waite, J. H.; Yelle, R. V. +15 more
Cassini Ion Neutral Mass Spectrometer (INMS) measurements from roughly a hundred Titan encounters over the Cassini mission yield neutral and ion densities systematically lower, by factors approximately 2 to 3, than estimates from several other spacecraft systems, including the Attitude and Articulation Control System, and Navigation system. In thi…
Was the soft X-ray flare in NGC 3599 due to an AGN disc instability or a delayed tidal disruption event?
Read, A. M.; Komossa, S.; Motta, S. E. +1 more
We present unpublished data from a tidal disruption candidate in NGC 3599 which show that the galaxy was already X-ray bright 18 months before the measurement which led to its classification. This removes the possibility that the flare was caused by a classical, fast-rising, short-peaked, tidal disruption event. Recent relativistic simulations ind…
Constraints on µ-distortion fluctuations and primordial non-Gaussianity from Planck data
Khatri, Rishi; Sunyaev, Rashid
We use the Planck HFI channel maps to make an all sky map of µ-distortion fluctuations. Our µ-type distortion map is dominated by the y-type distortion contamination from the hot gas in the low redshift Universe and we can thus only place upper limits on the µ-type distortion fluctuations. For the amplitude of µ-type distor…
Venus's major cloud feature as an equatorially trapped wave distorted by the wind
Sánchez-Lavega, A.; López-Valverde, M. A.; Machado, P. +2 more
The superrotation of the atmospheres of slowly rotating bodies is a long-standing problem yet unsolved in atmospheric dynamics. On Venus, the most extreme case known of superrotation, this is accompanied and influenced by a recurrent planetary-scale cloud structure, known as the Y feature. So far, no model has simultaneously reproduced its shape, …
The role of the Fraunhofer lines in solar brightness variability
Solanki, S. K.; Shapiro, A. I.; Tagirov, R. V. +2 more
Context. The solar brightness varies on timescales from minutes to decades. A clear identification of the physical processes behind such variations is needed for developing and improving physics-based models of solar brightness variability and reconstructing solar brightness in the past. This is, in turn, important for better understanding the sol…
Hyperbolic inflation in the light of Planck 2015 data
Basilakos, Spyros; Barrow, John D.
Rubano and Barrow have discussed the emergence of a dark energy, with late-time cosmic acceleration arising from a self-interacting homogeneous scalar field with a potential of hyperbolic power type. Here, we study the evolution of this scalar-field potential back in the inflationary era. Using the hyperbolic power potential in the framework of in…
Variability-selected active galactic nuclei in the VST-SUDARE/VOICE survey of the COSMOS field
Salvato, M.; Brandt, W. N.; Vaccari, M. +16 more
Context. Active galaxies are characterized by variability at every wavelength, with timescales from hours to years depending on the observing window. Optical variability has proven to be an effective way of detecting AGNs in imaging surveys, lasting from weeks to years.
Aims: In the present work we test the use of optical variability as a too…
SXP 5.05 = IGR J00569-7226: using X-rays to explore the structure of a Be star's circumstellar disc
Haberl, F.; Udalski, A.; Bartlett, E. S. +5 more
On MJD 56590-1 (2013 Oct 25-26), observations of the Magellanic Clouds by the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) observatory discovered a previously unreported bright, flaring X-ray source. This source was initially given the identification IGR J00569-7226. Subsequent multiwavelength observations identified the system as ne…