Search Publications
Three-dimensional analysis of spatial resolution of MIRO/Rosetta measurements at 67P/Churyumov-Gersimenko
Shi, X.; Hartogh, P.; Rezac, L. +3 more
Context. The MIRO instrument's remote sensing capability is integral to constraining water density, temperature, and velocity fields in the coma of 67P/Churyumov-Gersimenko.
Aims: Our aim is to quantify how much water density originates from the facets of the shape model within the field of view of MIRO versus the water contribution from all …
Influence of collisions on ion dynamics in the inner comae of four comets
Eriksson, A.; Vigren, E.; Galand, M. +2 more
Context. Collisions between cometary neutrals in the inner coma of a comet and cometary ions that have been picked up into the solar wind flow and return to the coma lead to the formation of a broad inner boundary known as a collisionopause. This boundary is produced by a combination of charge transfer and chemical reactions, both of which are imp…
Acoustic oscillations and dynamo action in the G8 sub-giant EK Eridani
Pallé, P. L.; Stello, D.; Corsaro, E. +3 more
We present further evidence of acoustic oscillations in the slowly rotating overactive G8 sub-giant EK Eri. This star was observed with the 1m Hertzsprung SONG telescope at the Observatorio del Teide for two different runs of 8 and 13 nights, respectively, that were separated by about a year. We determined a significant excess of power around ν
Solving the distance discrepancy for the open cluster NGC 2453. The planetary nebula NGC 2452 is not a cluster member
Silva-Villa, E.; Moitinho, A.; Moni Bidin, C. +6 more
Context. The open cluster (OC) NGC 2453 is of particular importance since it has been considered to host the planetary nebula (PN) NGC 2452, however their distances and radial velocities are strongly contested.
Aims: In order to obtain a complete picture of the fundamental parameters of the OC NGC 2453, 11 potential members were studied. The …
A multiwavelength study of filamentary cloud G341.244-00.265
Wang, Jun-Jie; Yu, Nai-Ping; Xu, Jing-Long
We present a multiwavelength study toward the filamentary molecular cloud G341.244-00.265, to investigate the physical and chemical properties, as well as star formation activities taking place therein. Our radio continuum and molecular line data were obtained from the Sydney University Molonglo Sky Survey (SUMSS), Atacama Pathfinder Experiment Te…
Exploring the multiphase medium in MKW 08: from the central active galaxy up to cluster scales
Ercan, E. N.; Bourdin, H.; Gaspari, M. +3 more
Context. The study of the brightest cluster galaxy (BCG) coronae embedded in noncool core (NCC) galaxy clusters is crucial to understand the BCG's role in galaxy cluster evolution as well as the activation of the self-regulated cooling and heating mechanism in the central regions of galaxy clusters.
Aims: We explore the X-ray properties of th…
30-micron sources in galaxies with different metallicities
Szczerba, R.; Lagadec, E.; Volk, K. +2 more
Aims: We present an analysis and comparison of the 30 µm dust features seen in the Spitzer Space Telescope spectra of 207 carbon-rich asymptotic giant branch (AGB) stars, post-AGB objects, and planetary nebulae (PNe) located in the Milky Way, the Magellanic Clouds (MCs), or the Sagittarius dwarf spheroidal galaxy (Sgr dSph), which are c…
HR 10: a main-sequence binary with circumstellar envelopes around both components. Discovery and analysis
Eiroa, C.; Montesinos, B.; Absil, O. +16 more
Context. This paper is framed within a large project devoted to studying the presence of circumstellar material around main sequence stars, and looking for exocometary events. The work concentrates on HR 10 (A2 IV/V), known for its conspicuous variability in the circumstellar narrow absorption features of Ca II K and other lines, so far interprete…
IGR J17503-2636: a candidate supergiant fast X-ray transient
Sanna, A.; Ferrigno, C.; Di Salvo, T. +4 more
The object IGR J17503-2636 is a hard X-ray transient discovered by INTEGRAL on 2018 August 11. This was the first ever reported X-ray emission from this source. Following the discovery, follow-up observations were carried out with Swift, Chandra, NICER, and NuSTAR. Here we report on the analysis of all of these X-ray data and the results obtained.…
Deuterated methanol toward NGC 7538-IRS1
Fedele, D.; Favre, C.; Lefloch, B. +7 more
We investigate the deuteration of methanol towards the high-mass star-forming region NGC 7538-IRS1. We carried out a multi-transition study of CH3OH, 13CH3OH, and the deuterated flavors, CH2DOH and CH3OD, between 1.0 and 1.4 mm with the IRAM-30 m antenna. In total, 34 13CH3