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Prof.
6c9e606df0845ea84b327fc5f7fd6dee
14
Dissecting the Universe - Workshop on Results from High-Resolution VLBI
<p><img alt="" src="https://events.mpifr-bonn.mpg.de/indico/event/4/material/0/0.png" style="height:430px; width:720px" /></p>
<p><strong>Scientific rationale:</strong></p>
<p>Recent developments have pushed the limits of resolution in astrophysics to new frontiers. Very-long-baseline interferometry (VLBI) at millimetre wavelengths or using antennas in space yields resolutions down to tens of microarcseconds (that is, fractions of nanoradians). These observations probe compact objects such as the innermost regions of active galactic nuclei. Space VLBI is living a new era at present with the results from the RadioAstron mission, enhancing radio interferometry in terms of resolution at least one order of magnitude with respect to ground-based VLBI. Millimetre VLBI also brings radio interferometry to a new range of resolution and with much enhanced sensitivity due to improvements in data bit rate. With more antennas capable of VLBI at 3-mm wavelength, and successful observations being carried out at 1-mm, a new window is open to universe at unprecedented resolution. This workshop will review recent results on high resolution radio astronomy, including opportunities provided by new antennas becoming available. It will also discuss on the applications of high-resolution imaging techniques and the synergies in the study of compact objects by space and mm-VLBI together. </p>
<p>Contributions to the workshop will be published online in this webpage; no regular proceedings are planned. Abstracts will be sent to the Astrophysical Data System.</p>
<p><strong>Scientific Organising Committee:</strong></p>
<p>E. Ros (MPIfR; Chair), M. Giroletti (IRA-INAF), T. Hovatta (Aalto Univ.), Y.Y. Kovalev (ASC Lebedev), A.P. Lobanov (MPIfR), J.A. Zensus (MPIfR)</p>
<p><strong>Local Organising Committee:</strong></p>
<p>E. Ros (Chair), G. Bruni, B. Naunheim, J.A. Zensus</p>
<p><strong>Sponsors:</strong></p>
<p>This meeting is sponsored by the MPI für Radioastronomie and by <a href="http://www.radionet-eu.org/">RadioNet3</a>. RadioNet3 has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 283393.</p>
<p> </p>
<p><img alt="" src="http://www.radionet-eu.org/sites/radionet-eu.org/files/cms/images/RadioNet_Logo_200.jpg" style="height:78px; width:200px" /> <strong><img alt="" src="http://www.radionet-eu.org/sites/radionet-eu.org/themes/radionet/img/header_EU.jpg" style="height:78px; width:117px" /></strong> </p>
False
Max-Planck-Institut für Radioastronomie, Bonn, Germany
MPI für Radioastronomie
Auf dem Hügel 69
D-53121 Bonn
GERMANY
0.02
2015-11-30T13:00:00
2015-12-02T18:00:00
2015-03-23T18:00:11
2015-12-10T10:43:02
Europe/Berlin
6c9e606df0845ea84b327fc5f7fd6dee
26
false
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1
Contributed
Silhouettes of parsec-scale AGN jets
Dr.
Crimean Astrophysical Observatory
a7db20a8a5d7587b076bcaefeb046c75
Dr.
Crimean Astrophysical Observatory
a7db20a8a5d7587b076bcaefeb046c75
Prof.
Purdue University
3591a538ae3614ce955c56a7c267d3ec
Dr.
ASC LPI
e662fef01a1d56828983aac26ab1e7d1
Dr.
Aalto Univ. & MPI für Radioastronomie
59a2ee2d05c0073e1a1a60619d5cdec2
Max-Planck-Institut für Radioastronomie, Bonn, Germany
MPI für Radioastronomie
Auf dem Hügel 69
D-53121 Bonn
GERMANY
0.02
2015-12-02T16:10:00
2015-12-02T16:30:00
00:20
We used 15 GHz VLBA observations of 373 sources having at least 5 epochs within a 20-yr time interval 1994–2015 from the MOJAVE program and/or its predecessor, the 2 cm VLBA Survey. For each source we produced a corresponding stacked image averaging all available epochs for a better reconstruction of the cross section of the flow. We have analyzed jet profiles transverse to the local jet ridge line and derived both apparent and intrinsic opening angles of the parsec-scale outflows. The sources detected by the Fermi Large Area Telescope during the first 48 months of operation show wider apparent jet opening angle and smaller viewing angles on a very high level of significance supporting our early findings. Analyzing transverse shapes of the outflows we found that most AGN outflows have conical geometry at parsec scales, though there are also sources that exhibit active jet collimation.
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2026-08-18
2026-08-19