Search Publications
Physical properties of the trans-Neptunian object (38628) Huya from a multi-chord stellar occultation
Ofek, E.; Marques Oliveira, J.; Sicardy, B. +85 more
Context. As part of our international program aimed at obtaining accurate physical properties of trans-Neptunian objects (TNOs), we predicted a stellar occultation by the TNO (38628) Huya of the star Gaia DR2 4352760586390566400 (mG = 11.5 mag) on March 18, 2019. After an extensive observational campaign geared at obtaining the astromet…
CAPOS: The bulge Cluster APOgee Survey. III. Spectroscopic tomography of Tonantzintla 2
Cohen, Roger E.; Beers, Timothy C.; Minniti, Dante +10 more
We performed the first detailed spectral analysis of red giant members of the relatively high-metallicity globular cluster (GC) Tononzintla 2 (Ton 2) using high-resolution near-infrared spectra collected with the Apache Point Observatory Galactic Evolution Experiment II survey (APOGEE-2), obtained as part of the bulge Cluster APOgee Survey. We inv…
A multiwavelength study of the W33 Main ultracompact HII region
Menten, K. M.; Khan, S.; Wyrowski, F. +7 more
Aims: The dynamics of ionized gas around the W33 Main ultracompact HII region is studied using observations of hydrogen radio recombination lines and a detailed multiwavelength characterization of the massive star-forming region W33 Main is performed.
Methods: We used the Giant Meterwave Radio Telescope (GMRT) to observe the H167α recomb…
Tracking the 3D evolution of a halo coronal mass ejection using the revised cone model
Zhang, Q. M.
Aims: This paper aims to track the three-dimensional (3D) evolution of a full halo coronal mass ejection (CME) on 2011 June 21.
Methods: The CME results from a nonradial eruption of a filament-carrying flux rope in NOAA active region 11236. The eruption was observed in extreme-ultraviolet (EUV) wavelengths by the extreme-ultraviolet imag…
Kepler-93: A testbed for detailed seismic modelling and orbital evolution of super-Earths around solar-like stars
Bétrisey, J.; Buldgen, G.; Khan, S. +4 more
Context. The advent of space-based photometry missions such as CoRoT, Kepler and TESS has sparkled the rapid development of asteroseismology and its synergies with exoplanetology. In the near future, the advent of PLATO will further strengthen such multi-disciplinary studies. In that respect, testing asteroseismic modelling strategies and their im…
The interstellar medium of high-redshift galaxies: Gathering clues from C III] and [C II] lines
Maiolino, R.; Pentericci, L.; Ferrara, A. +5 more
Context. A tight relation between [C II] 158 µm line luminosity and the star formation rate (SFR) has been observed for local galaxies. At high redshift (z > 5), galaxies instead deviate downwards from the local Σ[C II] − ΣSFR relation. This deviation might be caused by different interstellar medium (ISM) properties …
Energetic proton back-precipitation onto the solar atmosphere in relation to long-duration gamma-ray flares
Laitinen, T.; Dalla, S.; de Nolfo, G. A. +4 more
Context. Gamma-ray emission during long-duration gamma-ray flare (LDGRF) events is thought to be caused mainly by > 300 MeV protons interacting with the ambient plasma at or near the photosphere. Prolonged periods of the gamma-ray emission have prompted the suggestion that the source of the energetic protons is acceleration at a coronal mass ej…
Probing Kepler's hottest small planets via homogeneous search and analysis of optical secondary eclipses and phase variations
Scandariato, G.; Pagano, I.; Fossati, L. +5 more
Context. High-precision photometry can lead to the detection of secondary eclipses and phase variations of highly irradiated planets.
Aims: We performed a homogeneous search and analysis of optical occultations and phase variations of the most favorable ultra-short-period (USP) (P < 1 days) sub-Neptunes (Rp < 4 R⊕)…
Open clusters housing classical Cepheids in Gaia DR3
Hao, C. J.; Xu, Y.; Lin, Z. H. +4 more
The latest Gaia Data Release 3 provides an opportunity to expand the census of Galactic open clusters harboring classical Cepheid variables, thereby bolstering the cosmic distance scale. A comprehensive analysis yielded a total of 50 classical Cepheids associated with 45 open clusters, of which 39 open cluster-classical Cepheid pairs are considere…
Pulsating hydrogen-deficient white dwarfs and pre-white dwarfs observed with TESS. III. Asteroseismology of the DBV star GD 358
Kepler, S. O.; Hermes, J. J.; Kawaler, S. D. +14 more
Context. The collection of high-quality photometric data by space telescopes, such as the completed Kepler mission and the ongoing TESS program, is revolutionizing the area of white-dwarf asteroseismology. Among the different kinds of pulsating white dwarfs, there are those that have He-rich atmospheres, and they are called DBVs or V777 Her variab…