Search Publications
Chemically peculiar stars on the pre-main sequence
Paunzen, E.; Prišegen, M.; Faltová, N. +12 more
Context. The chemically peculiar (CP) stars of the upper main sequence are defined by spectral peculiarities that indicate unusual elemental abundance patterns in the presence of diffusion in the calm, stellar atmospheres. Some of them have a stable local magnetic field of up to several kiloGauss. The pre-main-sequence evolution of these objects i…
PSR J1227‑6208 and its massive white dwarf companion: Pulsar emission analysis, timing update, and mass measurements
Freire, Paulo C. C.; Kramer, Michael; Champion, David J. +7 more
PSR J1227‑6208 is a 34.53-ms recycled pulsar with a massive companion. This system has long been suspected to belong to the emerging class of massive recycled pulsar‑ONeMg white dwarf systems such as PSR J2222‑0137, PSR J1528‑3146, and J1439‑5501. Here, we present an updated emission and timing analysis with more than 11 years of combined Parkes a…
Heavy element abundances in galactic globular clusters
Cescutti, G.; Carretta, E.; Lucatello, S. +1 more
Context. Globular clusters are considered key objects for understanding the formation and evolution of the Milky Way. In this sense, the characterisation of their chemical and orbital parameters can provide constraints on chemical evolution models of the Galaxy.
Aims: We use the heavy element abundances of globular clusters to trace their ove…
Absolute dimensions of solar-type eclipsing binaries. NY Hya: A test for magnetic stellar evolution models
Stahl, O.; Morales, J. C.; Yılmaz, M. +29 more
Context. The binary star NY Hya is a bright, detached, double-lined eclipsing system with an orbital period of just under five days with two components each nearly identical to the Sun and located in the solar neighbourhood.
Aims: The objective of this study is to test and confront various stellar evolution models for solar-type stars based o…
The effects of stellar feedback on molecular clumps in the Lagoon Nebula (M8)
Wyrowski, Friedrich; Menten, Karl M.; Kahle, K. Angelique +3 more
Context. The Lagoon Nebula (M8) is host to multiple regions with recent and ongoing massive star formation, due to which it appears as one of the brightest H II regions in the sky. M8-Main and M8 East, two prominent regions of massive star formation, have been studied in detail over the past few years, while large parts of the nebula and its surro…
Study of solar brightness profiles in the 18-26 GHz frequency range with INAF radio telescopes. II. Evidence of coronal emission
Sasso, C.; Romoli, M.; Iacolina, M. N. +43 more
Context. One of the most important objectives of solar physics is to gain a physical understanding of the solar atmosphere, whose structure can also be described in terms of the density (N) and temperature (T) distributions of the atmospheric matter. Several multi-frequency analyses have shown that the characteristics of these distributions are st…
Searching for similarities in the accretion flow of Seyfert 1 galaxies and cataclysmic variables based on the flare profiles of IRAS 13224–3809, 1H 0707–495, Mrk 766, and MV Lyr
Dobrotka, A.; Negoro, H.; Bezák, P.
Aims. We studied the fast variability of three selected active galactic nuclei (AGNs), IRAS 13224‑3809, 1H 0707‑495, and Mrk 766, and the cataclysmic variable MV Lyr, which were observed by the XMM-Newton and Kepler spacecrafts, respectively. Our goal is to search for the common origin of the variability and to test the so-called sandwich model, i…
Calibration of the JAGB method for the Magellanic Clouds and Milky Way from Gaia DR3, considering the role of oxygen-rich AGB stars
Girardi, L.; Boyer, M. L.; Magnus, E. +3 more
The JAGB method is a new way of measuring distances in the Universe with the use of asymptotic giant branch (AGB) that are situated in a selected region in a J versus J ‑ Ks colour–magnitude diagram (CMD), and relying on the fact that the absolute J magnitude is (almost) constant. It is implicitly assumed in the method that the selected…
Breaking degeneracies in exoplanetary parameters through self-consistent atmosphere–interior modelling
Lagrange, A. -M.; Wilkinson, C.; Charnay, B. +5 more
Context. With a new generation of observational instruments largely dedicated to exoplanets (i.e. JWST, ELTs, PLATO, and Ariel) providing atmospheric spectra and mass and radius measurements for large exoplanet populations, the planetary models used to understand the findings are being put to the test. Aims. We seek to develop a new planetary mode…
Six new eccentric eclipsing systems with a third body
Wolf, M.; Zasche, P.; Henzl, Z.
We present the discovery of six new triple stellar system candidates composed of an inner eccentric-orbit eclipsing binary with an apsidal motion. These stars were studied using new, precise TESS light curves and a long-term collection of older photometric ground-based data. These data were used for the monitoring of ETVs (eclipse timing variation…