Search Publications
Herschel-PACS observations of shocked gas associated with the jets of L1448 and L1157
Liseau, R.; Codella, C.; van Dishoeck, E. F. +7 more
Aims: In the framework of the Water In Star-forming regions with Herschel (WISH) key program, several H2O (Eu > 190 K), high-J CO, [Oi], and OH transitions are mapped with Herschel-PACS in two shock positions along two prototypical outflows around the low-luminosity sources L1448 and L1157. Previous Herschel-HIFI H
Planck intermediate results. XII: Diffuse Galactic components in the Gould Belt system
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +179 more
We perform an analysis of the diffuse low-frequency Galactic components in the southern part of the Gould Belt system (130° ≤ l ≤ 230° and -50° ≤ b ≤ -10°). Strong ultra-violet flux coming from the Gould Belt super-association is responsible for bright diffuse foregrounds that we observe from our position inside the system and that can help us imp…
Low-mass X-ray binary populations in galaxy outskirts: Globular clusters and supernova kicks
Bogdán, Á.; Gilfanov, M.; Zhang, Z.
For the first time, we have systematically explored the population of discrete X-ray sources in the outskirts of early-type galaxies. Based on a broad sample of 20 galaxies observed with Chandra we detected overdensity of X-ray sources in their outskirts. The overdensity appears as halos of resolved sources around the galaxies. These halos are bro…
Inner rings in disc galaxies: dead or alive
Comerón, S.
In this Letter, I distinguish "passive" inner rings as those with no current star formation as distinct from "active" inner rings that have undergone recent star formation. I built a sample of nearby galaxies with inner rings observed in the near- and mid-infrared from the NIRS0S and the S4G surveys. I used archival far-ultraviolet (FUV…
Probing AGN triggering mechanisms through the starburstiness of the host galaxies
Fiore, F.; Piconcelli, E.; Santini, P. +3 more
We estimate the fraction of AGNs hosted in starburst galaxies (fbursty) as a function of the AGN luminosity predicted under the assumption that starburst events and AGN activity are triggered by galaxy interactions during their merging histories. The latter are described through Monte Carlo realizations, and are connected to star format…
Deep optical imaging of asymptotic giant branch circumstellar envelopes
Mauron, N.; Huggins, P. J.; Cheung, C. -L.
We report results of a program to image the extended circumstellar envelopes of asymptotic giant branch (AGB) stars in dust-scattered Galactic light. The goal is to characterize the shapes of the envelopes to probe the mass-loss geometry and the presence of hidden binary companions. The observations consist of deep optical imaging of 22 AGB stars …
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…