Search Publications
Cyanopolyyne line survey towards high-mass star-forming regions with TMRT
Wang, Y. X.; Zhang, J. S.; Yan, Y. T. +8 more
Context. Cyanopolyynes (HC2n+1 N, n = 1,2,3), which are the linear carbon chain molecules, are precursors for the prebiotic synthesis of simple amino acids. They are important for understanding prebiotic chemistry and may be good tracers of the star formation sequence.
Aims: We aim to search for cyanopolyynes in high-mass star-form…
Double peak quasi-periodic pulsations in a circular-ribbon flare
Altyntsev, A. T.; Meshalkina, N. S.; Sych, R. A. +1 more
We study quasi-periodic pulsations (QPPs) during the impulsive phase of the C8.3 flare SOL2002-08-06T01:43. The shape of an extended 5.7 GHz source is similar to a tadpole with the head located above the region of a negative magnetic polarity, surrounded by positive polarity patches and with a remote tail source. The flare configuration includes b…
Ammonia characterisation of dense cores in the Rosette Molecular Cloud
Schneider, N.; Csengeri, T.; Motte, F. +5 more
Context. The Rosette molecular cloud complex is a well-known Galactic star-forming region with a morphology pointing towards triggered star formation. The distribution of its young stellar population and the gas properties point to the possibility that star formation is globally triggered in the region.
Aims: We focus on the characterisation …
Volume-limited sample of low-mass red giant stars, the progenitors of hot subdwarf stars. l. Sample selection and binary classification method
Uzundag, Murat; Jones, Matías I.; Bobrick, Alexey +3 more
Context. Current theory predicts that hot subdwarf binaries are produced from evolved low-mass binaries that have undergone mass transfer and drastic mass loss during either a common-envelope phase or a stable Roche-lobe overflow while on the red giant branch (RGB).
Aims: We perform a spectroscopic survey to find binary systems that include l…
Semi-supervised standardized detection of extrasolar planets
Deleuil, M.; Sulis, S.; Mary, D. +1 more
Context. The detection of small exoplanets with the radial velocity (RV) technique is limited by various poorly known noise sources of instrumental and stellar origin. As a consequence, current detection techniques often fail to provide reliable estimates of the significance levels of detection tests in terms of false-alarm rates or p-values.
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Shapes of galaxies hosting radio-loud AGNs with z ≤ 1
van der Wel, A.; Zheng, X. C.; Röttgering, H. J. A. +1 more
Links between the properties of radio-loud active galactic nuclei (RLAGNs) and the morphology of their hosts may provide important clues for our understanding of how RLAGNs are triggered. In this work, focusing on passive galaxies, we study the shape of the hosts of RLAGNs selected from the Karl G. Jansky Very Large Array Cosmic Evolution Survey (…
The impact of the presence of water ice on the analysis of debris disk observations
Wolf, S.; Stuber, T. A.
Context. The analysis of debris disk observations is often based on the assumption of a dust phase composed of compact spherical grains consisting of astronomical silicate. Instead, observations indicate the existence of water ice in debris disks.
Aims: We quantify the impact of water ice as a potential grain constituent in debris disks on th…
Evidence for thermokarst depressions on comet 67P/Churyumov-Gerasimenko: An interplanetary comparison
Jorda, L.; Groussin, O.; Bouley, S. +3 more
Aims: The nucleus of comet 67P/Churyumov-Gerasimenko (67P) is ice rich and shows evidence of morphologies driven by sublimation processes. In particular, the fine-particle deposits (FPD) that cover its surface reveal depressions of many tens of meters. A detailed analysis of these morphologies and of the properties of the fine-particle deposi…
Constraining X-ray emission of a magnetically arrested disk by radio-loud AGNs with an extreme-ultraviolet deficit
Li, Shuang-Liang; Gu, Minfeng; Zhou, Minhua
Aims: Active galactic nuclei (AGNs) with an extreme-ultraviolet (EUV) deficit are suggested to be powered by a magnetically arrested disk (MAD) surrounding the black hole, where the slope of EUV spectra (αEUV) is found to possess a clearly positive relationship with the jet efficiency. In this work, we investigate the properties of…
Stellar Population Astrophysics (SPA) with the TNG. α-elements, lithium, sodium and aluminum in 16 open clusters
Vallenari, A.; Bragaglia, A.; Spina, L. +13 more
Context. Exploring the Galactic chemical evolution and enrichment scenarios with open clusters (OCs) allows us to understand the history of the Milky Way disk. High-resolution spectra of OCs are a crucial tool, as they provide precise chemical information, to combine with precise distances and ages.
Aims: The aim of the Stellar Population Ast…