Search Publications
H.E.S.S. and Suzaku observations of the Vela X pulsar wind nebula
Santangelo, A.; Quirrenbach, A.; Bregeon, J. +222 more
Context. Pulsar wind nebulae (PWNe) represent the most prominent population of Galactic very-high-energy gamma-ray sources and are thought to be an efficient source of leptonic cosmic rays. Vela X is a nearby middle-aged PWN, which shows bright X-ray and TeV gamma-ray emission towards an elongated structure called the cocoon.
Aims: Since TeV …
First detections of H13CO+ and HC15N in the disk around HD 97048. Evidence for a cold gas reservoir in the outer disk
Booth, Alice S.; Ilee, John D.; Walsh, Catherine
Observations of different molecular lines in protoplanetary disks provide valuable information on the gas kinematics, as well as constraints on the radial density and temperature structure of the gas. With ALMA we have detected H13CO+ (J = 4-3) and HC15N (J = 4-3) in the HD 97048 protoplanetary disk for the first t…
The HADES RV programme with HARPS-N at TNG. XI. GJ 685 b: a warm super-Earth around an active M dwarf
Rebolo, R.; Ribas, I.; Scandariato, G. +23 more
Context. Small rocky planets seem to be very abundant around low-mass M-type stars. Their actual planetary population is however not yet precisely understood. Currently, several surveys aim to expand the statistics with intensive detection campaigns, both photometric and spectroscopic.
Aims: The HADES program aims to improve the current stati…
Discovery of kilogauss magnetic fields on the nearby white dwarfs WD 1105-340 and WD 2150+591
Bagnulo, S.; Landstreet, J. D.
Magnetic fields are present in roughly 10% of white dwarfs. These fields affect the structure and evolution of such stars, and may provide clues about their earlier evolution history. Particularly important for statistical studies is the collection of high-precision spectropolarimetric observations of (1) complete magnitude-limited samples and (2)…
Combined geometrical modelling and white-light mass determination of coronal mass ejections
Vourlidas, Angelos; Bothmer, Volker; Pluta, Adam +2 more
Context. We use forward modelling on multi-viewpoint coronagraph observations to estimate the 3-dimensional morphology, initial speed and deprojected masses of Coronal Mass Ejections (CMEs). The CME structure is described via the Graduated Cylindrical Shell (GCS) model, which enables the measurement of CME parameters in a consistent and comparable…
HST/STIS analysis of the first main sequence pulsar CU Virginis
Pigulski, A.; Trigilio, C.; Leto, P. +9 more
Context. CU Vir has been the first main sequence star that showed regular radio pulses that persist for decades, resembling the radio lighthouse of pulsars and interpreted as auroral radio emission similar to that found in planets. The star belongs to a rare group of magnetic chemically peculiar stars with variable rotational period.
Aims: We…
NGTS-5b: a highly inflated planet offering insights into the sub-Jovian desert
Smalley, Barry; Jackman, James A. G.; Wheatley, Peter J. +32 more
Context. Planetary population analysis gives us insight into formation and evolution processes. For short-period planets, the sub-Jovian desert has been discussed in recent years with regard to the planet population in the mass/period and radius/period parameter space without taking stellar parameters into account. The Next Generation Transit Surv…
MUSE library of stellar spectra
Coccato, Lodovico; Ivanov, Valentin D.; Corsini, Enrico M. +5 more
Context. Empirical stellar spectral libraries have applications in both extragalactic and stellar studies, and they confer an advantage over theoretical libraries because they naturally include all relevant chemical species and physical processes. In recent years we have seen a stream of new sets of high-quality spectra, but increasing the spectra…
Formation of coronal rain triggered by impulsive heating associated with magnetic reconnection
Kohutova, P.; Verwichte, E.; Froment, C.
Context. Coronal rain consists of cool plasma condensations formed in coronal loops as a result of thermal instability. The standard models of coronal rain formation assume that the heating is quasi-steady and localised at the coronal loop footpoints.
Aims: We present an observation of magnetic reconnection in the corona and the associated im…
XMM-Newton observations of PSR J0726-2612, a radio-loud XDINS
Pintore, Fabio; Mereghetti, Sandro; Turolla, Roberto +4 more
We present the results of an XMM-Newton observation of the slowly rotating (P = 3.4 s), highly magnetized (B ≈ 3 × 1013 G) radio pulsar PSR J0726-2612. A previous X-ray observation with the Chandra satellite showed that some of the properties of PSR J0726-2612 are similar to those of the X-ray-dim isolated neutron stars (XDINSs), a smal…