Search Publications
Incidence of debris discs around FGK stars in the solar neighbourhood
Heras, A. M.; Fridlund, M.; Krivov, A. V. +16 more
Context. Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems. Their counterparts in the solar system are the asteroid and Edgeworth-Kuiper belts.
Aims: The aim of this paper is to provide robust numbers for the incidence of debris discs around FGK stars in the solar neighbourh…
Detailed homogeneous abundance studies of 14 Galactic s-process enriched post-AGB stars: In search of lead (Pb)
Van Winckel, H.; Kamath, D.; Karakas, A. I. +4 more
Context. This paper is part of a larger project in which we systematically study the chemical abundances of Galactic and extragalactic post-asymptotic giant branch (post-AGB) stars. The goal at large is to provide improved observational constraints to the models of the complex interplay between the AGB s-process nucleosynthesis and the associated …
The SHARDDS survey: First resolved image of the HD 114082 debris disk in the Lower Centaurus Crux with SPHERE
Pueyo, Laurent; Ertel, Steve; Boccaletti, Anthony +17 more
We present the first resolved image of the debris disk around the 16 ± 8 Myr old star, HD 114082. The observation was made in the H-band using the SPHERE instrument. The star is at a distance of 92 ± 6 pc in the Lower Centaurus Crux association. Using a Markov chain Monte Carlo analysis, we determined that the debris is likely in the form of a dus…
Deuterated polycyclic aromatic hydrocarbons: Revisited
Tielens, A. G. G. M.; Mori, T.; Onaka, T. +2 more
Aims: The amount of deuterium locked up in polycyclic aromatic hydrocarbons (PAHs) has to date been an uncertain value. We present a near-infrared (NIR) spectroscopic survey of Hii regions in the Milky Way, Large Magellanic Cloud, and Small Magellanic Cloud obtained with AKARI, which aims to search for features indicative of deuterated PAHs (…
VLT/ISAAC infrared spectroscopy of embedded high-mass YSOs in the Large Magellanic Cloud: Methanol and the 3.47 µm band
Boulanger, F.; Onaka, T.; Dartois, E. +1 more
Aims: This study aims to elucidate a possible link between chemical properties of ices in star-forming regions and environmental characteristics (particularly metallicity) of the host galaxy. The Large Magellanic Cloud (LMC) is an excellent target to study properties of interstellar and circumstellar medium in a different galactic environment…
Large dust gaps in the transitional disks of HD 100453 and HD 34282. Connecting the gap size to the spectral energy distribution and mid-infrared imaging
Tielens, A. G. G. M.; Khalafinejad, S.; Maaskant, K. M. +1 more
Context. The formation of dust gaps in protoplanetary disks is one of the most important signs of disk evolution and might indicate the formation of planets.
Aims: We aim to characterize the flaring disk structure around the Herbig Ae/Be stars HD 100453 and HD 34282. Their spectral energy distributions (SEDs) show an emission excess between 1…
Evolutionary status of isolated B[e] stars
Liu, Sheng-Yuan; Chen, Wen-Ping; Lee, Chien-De
Aims: We study a sample of eight B[e] stars with uncertain evolutionary status to shed light on the origin of their circumstellar dust.
Methods: We performed a diagnostic analysis on the spectral energy distribution beyond infrared wavelengths, and conducted a census of neighboring region of each target to ascertain its evolutionary stat…
The H I supershell GS 118+01-44 and its role in the interstellar medium
Noriega-Crespo, A.; Cichowolski, S.; Arnal, E. M. +3 more
Aims: We carry out a multiwavelength study to characterize the H I supershell designated GS 118+01-44, and to analyse its possible origin.
Methods: A multiwavelength study has been carried out to study the supershell and its environs. We performed an analysis of the H I, CO, radio continuum, and infrared emission distributions.
Resu…
A submillimetre search for pre- and proto-brown dwarfs in Chamaeleon II
de Gregorio-Monsalvo, I.; Eiroa, C.; Bayo, A. +7 more
Context. The Chamaeleon II molecular cloud is an active star-forming region that offers an excellent opportunity to study the formation of brown dwarfs in the southern hemisphere.
Aims: Our aims are to identify a population of pre- and proto-brown dwarfs (5σ mass limit threshold of ~0.015 M⊙) and provide information on the formatio…
Total infrared luminosity estimation from local galaxies in AKARI all sky survey
Takeuchi, T. T.; Pollo, A.; Solarz, A.
We aim to use the a new and improved version of AKARI all sky survey catalogue of far-infrared sources to recalibrate the formula to derive the total infrared luminosity. We cross-match the faint source catalogue (FSC) of IRAS with the new AKARI-FIS and obtained a sample of 2430 objects. Then we calculate the total infrared (TIR) luminosity L…