Search Publications
Triggered/sequential star formation? A multi-phase ISM study around the prominent IRDC G18.93-0.03
Henning, T.; Beuther, H.; Plume, R. +5 more
Context. Triggered star formation has been discussed for many years, and evidence for the formation of stars and cores triggered by Hii regions is under debate.
Aims: We investigate the imprints of an expanding Hii region on a pre-existing starless clumps.
Methods: We selected an infrared dark filament spanning 0.8°. One portion of this …
The spectrum of kink-like oscillations of solar photospheric magnetic elements
Berrilli, F.; Consolini, G.; Stangalini, M.
Recently, the availability of new high spatial and temporal resolution observations of the solar photosphere has allowed for the study of the oscillations in small magnetic elements. Small magnetic elements have been found to host a rich variety of oscillations detectable as intensity, longitudinal, or transverse velocity fluctuations that have be…
Analysis of Spitzer-IRS spectra of hyperluminous infrared galaxies
Carrera, F. J.; Nardini, E.; Panessa, F. +2 more
Context. Hyperluminous infrared galaxies (HLIRG) are the most luminous persistent objects in the Universe. They exhibit extremely high star formation rates, and most of them seem to harbour an active galactic nucleus (AGN). They are unique laboratories for investigating the most extreme star formation and its connection to super-massive black hole…
Fermi-LAT and Suzaku observations of the radio galaxy Centaurus B
Cheung, C. C.; Funk, S.; Kataoka, J. +8 more
Centaurus B is a nearby radio galaxy positioned in the southern hemisphere close to the Galactic plane. Here we present a detailed analysis of about 43 months of accumulated Fermi-LAT data of the γ-ray counterpart of the source initially reported in the 2nd Fermi-LAT catalog, and of newly acquired Suzaku X-ray data. We confirm its detection at GeV…
The Herschel/PACS view of disks around low-mass stars in Chamaleon-I
Pascucci, I.; Henning, Th.; Olofsson, J. +3 more
Context. Circumstellar disks are expected to be planet birthplaces. The potential for forming one or more planets of various masses is essentially driven by the initial mass of the disks, a crucial parameter for any planet formation theory. Constraining the masses of disks is of great interest for low-mass stars, which are expected to harbor less …
The shape of the cutoff in the synchrotron emission of SN 1006 observed with XMM-Newton
Miceli, M.; Bocchino, F.; Decourchelle, A. +3 more
Context. Synchrotron X-ray emission from the rims of young supernova remnants allows us to study the high-energy tail of the electrons accelerated at the shock front.
Aims: The analysis of X-ray spectra can provide information on the physical mechanisms that limit the energy achieved by the electrons in the acceleration process. We aim at ver…
Fueling the central engine of radio galaxies. II. The footprints of AGN feedback on the ISM of 3C 236
Morganti, R.; Combes, F.; García-Burillo, S. +7 more
Context. There is growing observational evidence of active galactic nuclei (AGN) feedback on the interstellar medium (ISM) of radio-quiet and radio-loud galaxies. While AGN feedback is expected to be more common at high-redshift objects, studying local universe galaxies helps to better characterize the different manifestations of AGN feedback.
A study on subarcsecond scales of the ammonia and continuum emission toward the G16.59-0.05 high-mass star-forming region
Sanna, A.; Pestalozzi, M.; Cesaroni, R. +4 more
Aims: We wish to investigate the structure, velocity field, and stellar content of the G16.59-0.05 high-mass star-forming region, where previous studies have established the presence of two almost perpendicular (NE-SW and SE-NW), massive outflows, and a rotating disk traced by methanol maser emission.
Methods: We performed Very Large Arr…
The fundamental parameters of the roAp star 10 Aquilae
Chesneau, O.; Goldfinger, P. J.; Sturmann, J. +12 more
Context. Owing to the strong magnetic field and related abnormal surface layers existing in rapidly oscillating Ap (roAp) stars, systematic errors are likely to be present when determining their effective temperatures, which potentially compromises asteroseismic studies of this class of pulsators.
Aims: Using the unique angular resolution pro…
HIFISTARS Herschel/HIFI observations of VY Canis Majoris. Molecular-line inventory of the envelope around the largest known star
Waters, L. B. F. M.; Menten, K. M.; Olofsson, H. +16 more
Aims: The study of the molecular gas in the circumstellar envelopes of evolved stars is normally undertaken by observing lines of CO (and other species) in the millimetre-wave domain. In general, the excitation requirements of the observed lines are low at these wavelengths, and therefore these observations predominantly probe the cold outer …