Search Publications
Proper motions of young stars in Chamaeleon. II. New kinematical candidate members of Chamaeleon I and II
Bouy, Hervé; Barrado, David; Bayo, Amelia +4 more
Context. The Chamaeleon star-forming region has been extensively studied in the last decades. However, most studies have been confined to the densest parts of the clouds. In a previous paper, we analysed the kinematical properties of the spectroscopically confirmed population of the Chamaeleon I and II clouds.
Aims: We want to search for new …
Nature of the gas and dust around 51 Ophiuchi. Modelling continuum and Herschel line observations
Pinte, C.; Ménard, F.; Woitke, P. +11 more
Context. Circumstellar disc evolution is paramount for the understanding of planet formation. The gas in protoplanetary discs large program (GASPS) aims at determining the circumstellar gas and solid mass around ~250 pre-main-sequence Herbig Ae and T Tauri stars.
Aims: We aim to understand the origin and nature of the circumstellar matter orb…
Can spicules be detected at disc centre in broad-band Ca ii H filter imaging data?
Rezaei, R.; Puschmann, K. G.; Beck, C.
Context. Recently, a possible identification of type II spicules in broad-band (full-width at half-maximum (FWHM) of ~0.3 nm) filter imaging data in Ca ii H on the solar disc was reported.
Aims: We estimate the formation height range contributing to broad-band and narrow-band filter imaging data in Ca ii H to investigate whether spicules can …
Neutral gas in Lyman-alpha emitting galaxies Haro 11 and ESO 338-IG04 measured through sodium absorption
Schaerer, D.; Östlin, G.; Hayes, M. +4 more
Context. The Lyman alpha emission line of neutral hydrogen is an important tool for finding galaxies at high redshift, thus for probing the structure of the early universe. However, the resonance nature of the line and its sensitivity to dust and neutral gas is still not fully understood.
Aims: We present measurements of the velocity, coverin…
P/2010 A2 LINEAR. II. Dynamical dust modelling
Meech, K. J.; Hainaut, O. R.; Kleyna, J.
Astronomical image denoising using dictionary learning
Starck, J. L.; Beckouche, S.; Fadili, J.
Astronomical images suffer a constant presence of multiple defects that are consequences of the atmospheric conditions and of the intrinsic properties of the acquisition equipment. One of the most frequent defects in astronomical imaging is the presence of additive noise which makes a denoising step mandatory before processing data. During the las…
The PSR J1124-5916 wind nebula in the near-infrared
Zharikov, S. V.; Zyuzin, D. A.; Mennickent, R. E. +1 more
Context. The young radio pulsar J1124-5916 is associated with the Cas A like supernova remnant G292.0+1.8. It powers a compact torus-like pulsar wind nebula with a jet first detected in X-rays and then identified in the optical and mid-infrared.
Aims: We carried out deep near-infrared observations of the pulsar field to identify the pulsar an…
A Herschel study of NGC 650
Ivison, R. J.; Olofsson, G.; Gomez, H. L. +15 more
As part of the Herschel guaranteed time key project Mass loss of Evolved StarS (MESS) we have imaged a sample of planetary nebulae. In this paper we present the Photodetector Array Camera and Spectrometer (PACS) and Spectral and Photometric Imaging Receiver (SPIRE) images of the classical bipolar planetary nebula NGC 650. We used these images to d…
Nonthermal emission properties of the northwestern rim of supernova remnant RX J0852.0-4622
Uchiyama, Y.; Kishishita, T.; Hiraga, J.
The supernova remnant (SNR) RX J0852.0-4622 (Vela Jr., G266.6-1.2) is one of the most important SNRs for investigating the acceleration of multi-TeV particles and the origin of Galactic cosmic rays because of its strong synchrotron X-ray and TeV γ-ray emission, which show a shell-like morphology similar to each other. Using the XMM-Newton archival…
Identification of transitional disks in Chamaeleon with Herschel
Prusti, T.; Pilbratt, G. L.; Bouy, H. +11 more
Context. Transitional disks are circumstellar disks with inner holes that in some cases are produced by planets and/or substellar companions in these systems. For this reason, these disks are extremely important for the study of planetary system formation.
Aims: The Herschel Space Observatory provides an unique opportunity for studying the ou…