Search Publications
The Herschel Virgo Cluster Survey. XVII. SPIRE point-source catalogs and number counts
Zibetti, Stefano; Bizzocchi, Luca; De Looze, Ilse +19 more
Aims: We present three independent catalogs of point-sources extracted from SPIRE images at 250, 350, and 500 µm, acquired with the Herschel Space Observatory as a part of the Herschel Virgo Cluster Survey (HeViCS). The catalogs have been cross-correlated to consistently extract the photometry at SPIRE wavelengths for each object.
…
Planck intermediate results. XVIII. The millimetre and sub-millimetre emission from planetary nebulae
Miville-Deschênes, M. -A.; Bernard, J. -P.; Planck Collaboration +158 more
Late stages of stellar evolution are characterized by copious mass-loss events whose signature is the formation of circumstellar envelopes (CSE). Planck multi-frequency measurements have provided relevant information on a sample of Galactic planetary nebulae (PNe) in the important and relatively unexplored observational band between 30 and 857 GHz…
The solar oxygen abundance from an empirical three-dimensional model
Socas-Navarro, H.
The oxygen abundance in the solar photosphere, and consequently the solar metallicity itself, is still a controversial question with far-reaching implications in many areas of astrophysics. This paper presents a new determination obtained by fitting the forbidden O i line at 6300 Å with an observational 3D model. The approach presented here is nov…
Herschel PACS and SPIRE spectroscopy of the photodissociation regions associated with S 106 and IRAS 23133+6050
Wolfire, M. G.; Tielens, A. G. G. M.; Boersma, C. +4 more
Context. Photodissociation regions (PDRs) contain a large portion of all of the interstellar matter in galaxies. Classical examples include the boundaries between ionized regions and molecular clouds in regions of massive star-formation, marking the point where all of the photons that are energetic enough to ionize hydrogen have been absorbed.
The EUV spectrum of the Sun: Irradiances during 1998-2014
Andretta, V.; Del Zanna, G.
We present calibrated EUV spectral irradiances obtained from observations with the Solar and Heliospheric Observatory (SOHO) Coronal Diagnostics Spectrometer (CDS) Normal Incidence Spectrometer (NIS) during the 1998-2014 period, which spans the cycle 23 maximum and minimum and the cycle 24 maximum. We revise the corrections for the burn-in of the …
Kelvin-Helmholtz instability in coronal mass ejecta in the lower corona
Zhelyazkov, I.; Chandra, R.; Zaqarashvili, T. V.
Aims: We modelled an imaged Kelvin-Helmholtz (KH) instability in coronal mass ejections (CME) in the lower corona by investigating conditions under which kink (m = 1) and m = -3 magnetohydrodynamic (MHD) modes in a uniformly twisted flux tube moving along its axis become unstable.
Methods: We employed the dispersion relations of MHD mode…
Swift J1734.5-3027: a new long Type-I X-ray bursting source
Romano, P.; Ferrigno, C.; Papitto, A. +3 more
Swift J1734.5-3027 is a hard X-ray transient discovered by Swift while undergoing an outburst in September 2013. Archival observations showed that this source underwent a previous episode of enhanced X-ray activity in 2013 May-June. In this paper we report on the analysis of all X-ray data collected during the outburst in 2013 September, the first…
A network of filaments detected by Herschel in the Serpens core. A laboratory to test simulations of low-mass star formation
Eiroa, C.; Burkert, A.; Testi, L. +6 more
Context. Filaments represent a key structure during the early stages of the star formation process. Simulations show that filamentary structures commonly formed before and during the formation of cores.
Aims: The Serpens core is an ideal laboratory for testing the state of the art of simulations of turbulent giant molecular clouds.
Metho…
Predicting the CIB-φ contamination in the cross-correlation of the tSZ effect and φ
Hurier, G.
The recent release of Planck data gives access to a full sky coverage of the thermal Sunyaev-Zel'dovich (tSZ) effect and of the cosmic microwave background (CMB) lensing potential (φ). The cross-correlation of these two probes of the large-scale structures in the Universe is a powerful tool for testing cosmological models, especially in the contex…
NGC 4370: a case study for testing our ability to infer dust distribution and mass in nearby galaxies
Ferrarese, L.; Boquien, M.; Bianchi, S. +14 more
Context. A segment of the early-type galaxy population hosts a prominent dust lane, often decoupled from its stellar body. Methods of quantifying the dust content of these systems based on optical imaging data usually yield dust masses that are an order of magnitude lower than dust masses derived from the observed far-IR (FIR) emission. The discre…