Publications (24)
Spectrum management and the EVN
Benjamin Winkel, Fabio Giovanardi, Michael Lindqvist
In recent years, the utilisation of the radio spectrum has dramatically increased. Digital telecommunication applications, be it terrestrial cell-phone networks or new-space low-ea…
A dynamical transition from atomic to molecular intermediate-velocity clouds
Tobias Röhser, Jürgen Kerp, Benjamin Winkel +2
Towards the high galactic latitude sky, the far-infrared (FIR) intensity is tightly correlated to the total hydrogen column density which is made up of atomic (HI) and molecular hy…
RFI detection by automated feature extraction and statistical analysis
Benjamin Winkel, Juergen Kerp, Stephan Stanko
In this paper we present an interference detection toolbox consisting of a high dynamic range Digital Fast-Fourier-Transform spectrometer (DFFT, based on FPGA-technology) and data…
The Molecular and Atomic Hydrogen Gas Content of the Boötes Void galaxy CG 910
Ekta Sharma, Prerana Biswas, Mousumi Das +1
Void galaxies are located in the most underdense environments of the Universe, where the number density of galaxies is extremely low. They are, hence, good targets for studying the…
Extending the view of ArH+ chemistry in diffuse clouds
Arshia M. Jacob, Karl M. Menten, Friedrich Wyrowski +2
One of the surprises of the Herschel mission was the detection of ArH+ towards the Crab Nebula in emission and in absorption towards strong Galactic background sources. Although th…
A Low Metallicity Molecular Cloud In The Lower Galactic Halo
Audra K. Hernandez, Bart P. Wakker, Robert A. Benjamin +5
We find evidence for the impact of infalling, low-metallicity gas on the Galactic disk. This is based on FUV absorption line spectra, 21-cm emission line spectra, and FIR mapping t…
The Effelsberg-Bonn HI Survey (EBHIS)
Juergen Kerp, Benjamin Winkel, Nadya Ben Bekhti +2
The Effelsberg-Bonn HI survey (EBHIS) comprises an all-sky survey north of Dec = -5 degrees of the Milky Way and the local volume out to a red-shift of z ~ 0.07. Using state of the…
Real-time RFI Mitigation Techniques in Radio Astronomy and Their Practical Limitations
Kaushal D. Buch, Thushara Gunaratne, Gregory Hellbourg +2
Radio astronomy is facing critical challenges due to an ever-increasing human-made signal density filling up the radio spectrum. With the rise of satellites, mobile networks, and o…
The high-velocity cloud complex Galactic Center Negative as seen by EBHIS and GASS. I. Cloud catalog and global properties
Benjamin Winkel, Nadya Ben Bekhti, Verena Darmstädter +3
Using Milky Way data of the new Effelsberg-Bonn HI Survey (EBHIS) and the Galactic All-Sky Survey (GASS), we present a revised picture of the high-velocity cloud (HVC) complex Gala…
Real-time RFI Excision Techniques and their Limitations
Kaushal D. Buch, Ruta Kale, Kishor D. Naik +8
Contemporary real-time RFI mitigation is carried out at different stages primarily using regulatory and technical approaches. Regulatory approaches include spectrum management, rad…
Ubiquitous argonium (ArH) in the diffuse interstellar medium -- a molecular tracer of almost purely atomic gas
Peter Schilke, David A. Neufeld, Holger S. P. Müller +14
We describe the assignment of a previously unidentified interstellar absorption line to ArH and discuss its relevance in the context of hydride absorption in diffuse gas with a…
Preserving your skies since 1988 -- Committee on Radio Astronomy Frequencies (CRAF) -- Periodic Review 2011-2021
Committee on Radio Astronomy Frequencies, Benjamin Winkel, Simon Garrington +43
The Committee on Radio Astronomy Frequencies (CRAF) is an Expert Committee of the European Science Foundation. It aims to provide a cost-effective single voice on frequency protect…
Structure and Kinematics of the Nearby Dwarf Galaxy UGCA 105
Philip Schmidt, Gyula Jozsa, Gianfranco Gentile +5
Owing to their shallow stellar potential, dwarf galaxies possess thick gas disks, which makes them good candidates for studies of the galactic vertical kinematical structure. We pr…
ArH+ and H2O+ absorption towards luminous galaxies
Arshia M. Jacob, Karl M. Menten, Friedrich Wyrowski +3
Along several sight lines within the Milky Way ArH+ has been ubiquitously detected with only one detection in extragalactic environments, namely along two sight lines in the red sh…
Compatibility Between Wind Turbines and the Radio Astronomy Service
Benjamin Winkel, Axel Jessner
Modern radio astronomical facilities are able to detect extremely weak electromagnetic signals not only from the universe but also from man-made radio frequency interference of var…
Source finding, parametrization and classification for the extragalactic Effelsberg-Bonn HI Survey
Lars Flöer, Benjamin Winkel, Jürgen Kerp
Context. Source extraction for large-scale HI surveys currently involves large amounts of manual labor. For data volumes expected from future HI surveys with upcoming facilities, t…
SatHub Panel: Satellite Interference in Observatories Around the World
Siegfried Eggl, Zouhair Benkhaldoun, Genoveva Micheva +5
Satellite constellation interference occurs across astronomical disciplines. We present examples of interference from radio and -Ray astronomy to optical and spectroscopic inte…
Far-infrared excess emission as a tracer of disk-halo interaction
Daniel Lenz, Jürgen Kerp, Lars Flöer +3
Given the current and past star-formation in the Milky Way in combination with the limited gas supply, the re-fuelling of the reservoir of cool gas is an important aspect of Galact…
SoFiA: a flexible source finder for 3D spectral line data
Paolo Serra, Tobias Westmeier, Nadine Giese +9
We introduce SoFiA, a flexible software application for the detection and parameterization of sources in 3D spectral-line datasets. SoFiA combines for the first time in a single pi…
Call to Protect the Dark and Quiet Sky from Harmful Interference by Satellite Constellations
IAU Centre for the Protection of the Dark, Quiet Sky from Satellite Constellation Interference, Gyula I. G. Józsa +40
The growing number of satellite constellations in low Earth orbit (LEO) enhances global communications and Earth observation, and support of space commerce is a high priority of ma…
EZOA -- A catalogue of EBHIS HI detected galaxies in the northern Zone of Avoidance
Anja C. Schröder, Lars Flöer, Benjamin Winkel +1
We present a catalogue of galaxies in the northern Zone of Avoidance (ZoA), extracted from the shallow version of the blind HI survey with the Effelsberg 100 m radio telescope, EBH…
The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
The Astropy Collaboration, Adrian M. Price-Whelan, Pey Lian Lim +133
The Astropy Project supports and fosters the development of open-source and openly-developed Python packages that provide commonly needed functionality to the astronomical communit…
Kinematic analysis of the super-extended HI disk of the nearby spiral galaxy M83
Cosima Eibensteiner, Frank Bigiel, Adam K. Leroy +33
We present new HI observations of the nearby massive spiral galaxy M83, taken with the VLA at angular resolution ( pc) of an extended (1.5 deg…
2D-1D Wavelet Reconstruction As A Tool For Source Finding In Spectroscopic Imaging Surveys
Lars Flöer, Benjamin Winkel
Today, image denoising by thresholding of wavelet coefficients is a commonly used tool for 2D image enhancement. Since the data product of spectroscopic imaging surveys has two spa…