Search Publications
A multifrequency characterization of the extragalactic hard X-ray sky. Presenting the second release of the Turin-SyCAT
Masetti, N.; Chavushyan, V.; Bottacini, E. +5 more
Context. Nowadays, we know that the origin of the cosmic X-ray background (CXB) is mainly due to the integrated emission of active galactic nuclei. Therefore, in order to obtain a precise estimate of the contribution of different source classes to the CXB, it is crucial to achieve full characterization of the hard-X ray sky.
Aims: We present …
Analysis of minimum ionising particles and soft protons using XMM-Newton EPIC pn-CCD as a particle detector
Freyberg, M. J.; Kirsch, M. G. F.; Bender, V. +1 more
Context. Spacecrafts with imaging telescopes often carry a charge-coupled device (CCD) in their focal plane to detect electromagnetic radiation. Charged particles such as electrons, protons, and heavy ions can reach the CCD and deposit their energy in the detector material. To counteract this undesirable effect, algorithms are usually implemented …
The kinematics of the magnetized protostellar core IRAS15398-3359
Caselli, Paola; Redaelli, Elena; Tabatabaei, Farideh S. +1 more
Context. Observations of protostellar envelopes are essential in order to understand better the process of gravitational collapse toward star and planet formation. From a theoretical perspective, magnetic fields are considered an important factor during the early stages of star formation, especially during the main accretion phase.
Aims: Our …
The equilibrium shape of (65) Cybele: primordial or relic of a large impact?
Jorda, L.; Carry, B.; Molina, D. +24 more
Context. Cybele asteroids constitute an appealing reservoir of primitive material genetically linked to the outer Solar System, and the physical properties (size and shape) of the largest members can be readily accessed by large (8m class) telescopes.
Aims: We took advantage of the bright apparition of the most iconic member of the Cybele pop…
Stellar angular momentum of disk galaxies at z ≈ 0.7 in the MAGIC survey. I. Impact of the environment
Ciesla, L.; Krajnović, D.; Lemaux, B. C. +6 more
Aims: At intermediate redshift, galaxy groups and clusters are thought to impact galaxy properties such as their angular momentum. We investigate whether the environment has an impact on the galaxies' stellar angular momentum and identify underlying driving physical mechanisms.
Methods: We derived robust estimates of the stellar angular …
Searching for the nature of stars with debris disks and planets
Cifuentes, C.; Cruz, P.; Roca-Fàbrega, S. +3 more
The nature of the few known solar-mass stars simultaneously containing debris disks and planets remains an open question. A number of works have shown that this property appears to be independent of planetary masses as well as of stellar age, but possible correlations with stellar kinematics and metallicity have not been investigated. In this pape…
Glancing through the debris disk: Photometric analysis of DE Boo with CHEOPS
Guterman, P.; Alonso, R.; Deleuil, M. +76 more
Aims: DE Boo is a unique system, with an edge-on view through the debris disk around the star. The disk, which is analogous to the Kuiper belt in the Solar System, was reported to extend from 74 to 84 AU from the central star. The high photometric precision of the Characterising Exoplanet Satellite (CHEOPS) provided an exceptional opportunity…
CCD astrometric measurements for the dwarf planet Haumea by ground-based telescopes
Vienne, A.; Peng, Q. Y.; Zheng, Z. J. +3 more
Aims: The purpose of this work is to investigate an astrometric method to accurately measure the precise position of the center of mass of the dwarf planet Haumea and its satellites, based on the unresolved images taken by ground-based telescopes.
Methods: A total of 29 nights of CCD observations are reported of the dwarf planet Haumea, …
Polarisation of molecular lines in the circumstellar envelope of the post-asymptotic giant branch star OH 17.7-2.0
Tafoya, D.; Vlemmings, W. H. T.
Context. The role of magnetic field in shaping planetary nebulae (PNe), either directly or indirectly after being enhanced by binary interaction, has long been a topic of debate. Large-scale magnetic fields around pre-PNe have been inferred from polarisation observations of masers. However, because masers probe very specific regions, it is still u…
Orbit determination for the binary Cepheid V1344 Aql
Szabados, L.; Cseh, B.; Kovács, J. +4 more
Context. Binary Cepheids play an important role in the investigation of the calibration of the classical Cepheid period-luminosity relationship. Therefore, a thorough study of individual Cepheids belonging to binary systems is necessary.
Aims: Our aim is to determine the orbit of the binary system V1344 Aql using newly observed and earlier pu…