Search Publications
Star forming galaxies in the AKARI deep field south: identifications and spectral energy distributions
Małek, K.; Takeuchi, T. T.; Pollo, A. +4 more
Aims: We investigate the nature and properties of far-infrared (FIR) sources in the AKARI deep field south (ADF-S).
Methods: We performed an extensive search for the counterparts to 1000 ADF-S objects brighter than 0.0301 Jy in the WIDE-S (90 µm) AKARI band in the public databases (NED and SIMBAD). We analyzed the properties of the…
The structured environments of embedded star-forming cores . PACS and SPIRE mapping of the enigmatic outflow source UYSO 1
Stecklum, B.; Henning, Th.; Krause, O. +6 more
The intermediate-mass star-forming core UYSO 1 has previously been found to exhibit intriguing features. While deeply embedded and previously only identified by means of its (sub-)millimeter emission, it drives two powerful, dynamically young, molecular outflows. Although the process of star formation has obviously started, the chemical compositio…
Molecular disks in radio galaxies. The pathway to ALMA
Prandoni, I.; de Ruiter, H. R.; Parma, P. +1 more
Context. It has recently been proposed that the jets of low-luminosity radio galaxies are powered by direct accretion of the hot phase of the IGM onto the central black hole. Cold gas remains a plausible alternative fuel supply, however. The most compelling evidence that cold gas plays a role in fueling radio galaxies is that dust is detected more…
Deep XMM-Newton observation of the η Chamaleontis cluster
López-Santiago, J.; Albacete Colombo, J. F.; López-García, M. A.
Context. The members of the η Chamaleontis cluster are in an evolutionary stage in which disks are rapidly evolving. It also exhibits some peculiarities, such as the large fraction of binaries and accretion disks, probably related to the cluster formation process. Its proximity makes this stellar group an ideal target for studying the relation bet…
Nonlinear force-free modelling: influence of inaccuracies in the measured magnetic vector
Solanki, S. K.; Lagg, A.; Wiegelmann, T. +1 more
Context. Solar magnetic fields are regularly extrapolated into the corona starting from photospheric magnetic measurements that can be affected by significant uncertainty.
Aims: We study how inaccuracies introduced into the maps of the photospheric magnetic vector by the inversion of ideal and noisy Stokes parameters influence the extrapolati…
Kiloparsec-scale star formation law in M 81 and M 101 based on AKARI far-infrared observations
Nakagawa, T.; Onaka, T.; Shibai, H. +2 more
Aims: We assess the relationships between the surface densities of the gas and star formation rate (SFR) within spiral arms of the nearby late-type spiral galaxies M 81 and M 101. By analyzing these relationships locally, we empirically derive a kiloparsec scale Kennicutt-Schmidt Law (ΣSFR ∝ ΣgasN).
Metho…
Molecular gas in NUclei of GAlaxies (NUGA) XIII. The interacting Seyfert 2/LINER galaxy NGC 5953
Hunt, L. K.; Schinnerer, E.; Combes, F. +5 more
We present 12CO(1-0) and 12CO(2-1) maps of the interacting Seyfert 2/LINER galaxy NGC 5953 obtained with the IRAM interferometer at resolutions of 2.1 arcsec × 1.4 arcsec and 1.1 arcsec × 0.7 arcsec, respectively. We also present single-dish IRAM 30 m observations of the central region of NGC 5953 for the 12CO(1-0)…
An iterative method in a probabilistic approach to the spectral inverse problem. Differential emission measure from line spectra and broadband data
Parenti, S.; Reale, F.; Hochedez, J. -F. +3 more
Context. Inverse problems are of great importance in astrophysics, e.g., for deriving information about the physical characteristics of hot optically thin plasma sources from their extreme ultraviolet and X-ray spectra.
Aims: We describe and test an iterative method developed within the framework of a probabilistic approach to the spectral in…
Magnetic and spectroscopic properties of supergranular-scale coronal jets and erupting loops in a polar coronal hole
Tu, C. -Y.; Marsch, E.; Curdt, W. +4 more
Context. Coronal jets and mass ejections associated with erupting loops are two distinct and frequently observed types of transient upflows of plasma in coronal holes (CHs). But the magnetic and spectroscopic properties of these events at the supergranular scale are not well known.
Aims: Here we aim at studying in a polar hole the plasma and …
A New 626 s periodic X-ray source in the direction of the Galactic center
Farrell, S. A.; Webb, N. A.; Barret, D. +4 more
Aims: Here we report the detection of a 626 s periodic modulation from the X-ray source 2XMM J174016.0-290337 located in the direction of the Galactic center.
Methods: We present temporal and spectral analyses of archival XMM-Newton data and photometry of archived near-infrared data in order to investigate the nature of this source.
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