Search Publications
Detection of OH+ and H2O+ towards Orion KL
Menten, K. M.; Falgarone, E.; Martin, P. G. +76 more
We report observations of the reactive molecular ions OH+, H2O+, and H3O+ towards Orion KL with Herschel/HIFI. All three N = 1-0 fine-structure transitions of OH+ at 909, 971, and 1033 GHz and both fine-structure components of the doublet ortho-H2O+ 111
Dust in the bright supernova remnant N49 in the LMC
van Loon, J. Th.; Reach, W. T.; Okumura, K. +14 more
We investigate the dust associated with the supernova remnant (SNR) N49 in the Large Magellanic Cloud (LMC) as observed with the Herschel Space Observatory. N49 is unusually bright because of an interaction with a molecular cloud along its eastern edge. We have used PACS and SPIRE to measure the far IR flux densities of the entire SNR and of a bri…
Herschel observations of embedded protostellar clusters in the Rosette molecular cloud
Olofsson, G.; Abergel, A.; Hill, T. +39 more
The Herschel OB young stellar objects survey (HOBYS) has observed the Rosette molecular cloud, providing an unprecedented view of its star formation activity. These new far-infrared data reveal a population of compact young stellar objects whose physical properties we aim to characterise. We compiled a sample of protostars and their spectral energ…
LoCuSS: Probing galaxy transformation physics with Herschel
Zhang, Y. -Y.; Finoguenov, A.; Smith, G. P. +12 more
We present an early broad-brush analysis of Herschel/PACS observations of star-forming galaxies in 8 galaxy clusters drawn from our survey of 30 clusters at z ≃ 0.2. We define a complete sample of 192 spectroscopically confirmed cluster members down to LTIR > 3 × 1010 L⊙ and LK > 0.25 L_K^star. The…
Herschel observations of FIR emission lines in brightest cluster galaxies
Böhringer, H.; Popesso, P.; Jaffe, W. +24 more
The question of how much gas cools in the cores of clusters of galaxies has been the focus of many, multiwavelength studies in the past 30 years. In this letter we present the first detections of the strongest atomic cooling lines, [Cii], [Oi] and [Nii] in two strong cooling flow clusters, A1068 and A2597, using Herschel-PACS. These spectra indica…
Fine-structure infrared lines from the Cassiopeia A knots
Sunyaev, R. A.; Docenko, D.
Aims: Archival observations of infrared fine-structure lines of the young Galactic supernova remnant Cassiopeia A allow us to test existing models and determine the physical parameters of various regions of the fast-moving knots, which are metal-dominated clouds of material ejected by the supernova explosion.
Methods: The fluxes of far-i…
First detection of the methylidyne cation (CH+) fundamental rotational line with the Herschel/SPIRE FTS
Miville-Deschênes, M. -A.; Boulanger, F.; Abergel, A. +42 more
Aims: To follow the species chemistry arising in diverse sources of the Galaxy with Herschel.
Methods: SPIRE FTS sparse sampled maps of the Orion bar & compact HII regions G29.96-0.02 and G32.80+0.19 have been analyzed.
Results: Beyond the wealth of atomic and molecular lines detected in the high-resolution spectra obtained with…
uvby-β photometry of solar twins . The solar colors, model atmospheres, and the Teff and metallicity scales
Casagrande, L.; Schuster, W. J.; Meléndez, J. +3 more
Aims: Solar colors have been determined on the uvby-β photometric system to test absolute solar fluxes, to examine colors predicted by model atmospheres as a function of stellar parameters (Teff, log g, [Fe/H]), and to probe zero-points of Teff and metallicity scales.
Methods: New uvby-β photometry is presented for …
C2D Spitzer-IRS spectra of disks around T Tauri stars. V. Spectral decomposition
Ménard, F.; Augereau, J. -C.; Grosso, N. +5 more
Context. Dust particles evolve in size and lattice structure in protoplanetary disks, due to coagulation, fragmentation and crystallization, and are radially and vertically mixed in disks due to turbulent diffusion and wind/radiation pressure forces.
Aims: This paper aims at determining the mineralogical composition and size distribution of t…
A multi-wavelength study of the young star V1118 Orionis in outburst
Audard, M.; Güdel, M.; Briggs, K. R. +6 more
Context. The accretion history of low-mass young stars is not smooth but shows spikes of accretion that can last from months and years to decades and centuries.
Aims: Observations of young stars in outbursts can help us understand the temporal evolution of accreting stars and the interplay between the accretion disk and the stellar magnetosph…