Welcome
I am an astrophysicist working on accretion and ejection processes in compact objects. I am an Assistant Professor at the 'Université Paris Diderot'. My research involves theory as well as observation. I am currently focused on the unification of accreting objects of all types and mass scales. As all emission components scale with black hole mass I consider it to be important to combine all observable wavelengths, especially radio, optical and X-rays.
My current projects, publications and a CV can be found in the 'Research' section.
My name contains a German Umlaut. Thus, you will sometimes see it written as Koerding or misspelled as Kording.
This domain is also used for email distribution by my brother Konrad and my father Alfred.
News and recent results:
A Global Spectral Study of Black Hole X-ray Binaries
R. Dunn, R. Fender, E. Koerding, T. Belloni, C. Cabanac, MNRAS, in press http://arxiv.org/abs/0912.0142
The infrared/X-ray correlation of GX 339-4: probing hard X-ray emission in accreting black holes
M. Coriat, S. Corbel, M. Buxton, C. Bailyn, J. Tomsick, E. Körding, E. Kalemci, MNRAS, 2009, http://arxiv.org/abs/0909.3283
On the variation of black hole accretion disc radii as a function of state and accretion rate
C. Cabanac, R. Fender, R. Dunn, E. Körding, MNRAS, 2009, http://arxiv.org/abs/0904.0701
Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71. III. Rapid and correlated flux density variability from radio to sub-mm bands
L. Fuhrmann, T. Krichbaum, A. Witzel, et al. (including EK) A&A, 2008, http://arxiv.org/abs/0809.2227
Revisiting the radio/X-ray flux correlation in the black hole V404 Cyg: from outburst to quiescence
S. Corbel, E. Koerding, P. Kaaret, MNRAS, 2008, http://arxiv.org/abs/0806.3079
A transient radio jet in an erupting dwarf nova
Elmar Koerding (1), Michael Rupen (2), Christian Knigge (1), Rob Fender (1), Vivek Dhawan (2), Matthew Templeton (3), Tom Muxlow (4), ((1) Southampton, (2) NRAO, (3) AAVSO, (4) Manchester) Science, 2008 http://arxiv.org/abs/0806.1002
Measuring the accretion rate and kinetic luminosity functions of supermassive black holes
E. G. Koerding (1), S. Jester (2), R. Fender (1) ((1) Southampton, (2) MPI Astronomie, Heidelberg), 2008, MNRAS http://arxiv.org/abs/0710.1718
Studying the X-ray hysteresis in GX 339-4: the disc and iron line over one decade
R. J. H. Dunn, R. P. Fender, E. G. Koerding, C. Cabanac (University of Southampton), T. Belloni (INAF - Osservatorio Astronomico di Brera) 2008, MNRAS http://arxiv.org/abs/0804.0148
Parallel tracks in infrared versus X-ray emission in black hole X-ray transient outbursts: a hysteresis effect?
D. M. Russell, T. J. Maccarone, E. G. Koerding, J. Homan, 2007, MNRAS http://uk.arxiv.org/abs/astro-ph/0705.3594
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