Search Publications
Origin of the solar wind: A novel approach to link in situ and remote observations. A study for SPICE and SWA on the upcoming Solar Orbiter mission
Berger, Lars; Wimmer-Schweingruber, Robert; Peleikis, Thies +1 more
Context. During the last decades great progress has been achieved in understanding the properties and the origin of the solar wind. While the sources for the fast solar wind are well understood, the sources for the slow solar wind remain elusive.
Aims: The upcoming Solar Orbiter mission aims to improve our understanding of the sources of the …
On the frequency of star-forming galaxies in the vicinity of powerful AGNs: The case of SMM J04135+10277
Knudsen, K. K.; Drouart, G.; Lagos, C. D. P. +2 more
Context. In the last decade several massive molecular gas reservoirs were found <100 kpc distance from active galactic nuclei (AGNs), residing in gas-rich companion galaxies. The study of AGN-gas-rich companion systems opens the opportunity to determine whether the stellar mass of massive local galaxies was formed in their host after a merger e…
"TNOs are Cool": A survey of the trans-Neptunian region. XII. Thermal light curves of Haumea, 2003 VS2 and 2003 AZ84 with Herschel/PACS
Jorda, L.; Fornasier, S.; Groussin, O. +10 more
Context. Time series observations of the dwarf planet Haumea and the Plutinos 2003 VS2 and 2003 AZ84 with Herschel/PACS are presented in this work. Thermal emission of these trans-Neptunian objects (TNOs) were acquired as part of the "TNOs are Cool" Herschel Space Observatory key programme.
Aims: We search for the therma…
Insights on star-formation histories and physical properties of 1.2 ≤z ≲ 4 Herschel-detected galaxies
Elbaz, D.; Schaerer, D.; Pannella, M. +3 more
Aims: We aim to test the impact of using variable star-forming histories (SFHs) and the IR luminosity as a constrain on the physical parameters of high redshift dusty star-forming galaxies. We explore in particular the properties (SFHs, ages, timescales) of galaxies depending on their belonging to the "main sequence" of star-forming galaxies …
Herschel observations of the circumstellar environments of the Herbig Be stars R Mon and PDS 27
Eiroa, C.; Montesinos, B.; Henning, T. +4 more
Context. The circumstellar environments of Herbig Be stars in the far-infrared are poorly characterised, mainly because they are often embedded and rather distant. The analysis of far-infrared spectroscopy allows us to make a major step forward by covering multiple rotational lines of molecules, e.g. CO, that are useful probes of the physical cond…
Derivation of sideband gain ratio for Herschel/HIFI
Kester, Do; Higgins, Ronan; Teyssier, David
Context. Heterodyne mixers are commonly used for high-resolution spectroscopy at radio telescopes. When used as a double sideband system, the accurate flux calibration of spectral lines acquired by those detectors is highly dependent on the system gains in the respective mixer sidebands via the so-called sideband gain ratio (SBR). As such, the SBR…
Atomic hydrogen bridge fueling NGC 4418 with gas from VV 655
Privon, G. C.; Aalto, S.; Klöckner, H. -R. +6 more
Context. The galaxy
Charge exchange in the ultraviolet: implication for interacting clouds in the core of NGC 1275
Baum, Stefi A.; O'Dea, Christopher P.; Gu, Liyi +3 more
Context. Charge exchange emission is known to provide a key diagnostic to the interface between hot and cold matter in many astrophysical environments. Most of the recent charge exchange studies focus on its emission in the X-ray band; only a few focus on the UV, even though it can also provide a powerful probe of the charge exchange process.
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Observations of Cygnus X-1 in the MeV band by the INTEGRAL imager
Walter, R.; Xu, M.
Context. The spectrum of the MeV tail detected in the black-hole candidate Cygnus X-1 remains controversial as it appeared much harder when observed with the INTEGRAL Imager IBIS than with the INTEGRAL spectrometer SPI or CGRO.
Aims: We present an independent analysis of the spectra of Cygnus X-1 observed by IBIS in the hard and soft states. …
Dust properties of the cometary globule Barnard 207 (LDN 1489)
Togi, Aditya; Witt, Adolf N.; John, Demi St.
Barnard 207 (B207, LDN 1489, LBN 777), also known as the Vulture Head nebula, is a cometary globule in the Taurus-Auriga-Perseus molecular cloud region. B207 is known to host a Class I protostar, IRAS 04016+2610, located at a projected distance of 8400 au from the dense core centre. Using imaging and photometry over a wide wavelength range, from U…