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Autor:
Eckart, A., Valencia-S., M., Shahzamanian, B., Zajacek, M., Moser, L., Busch, G., Parsa, M., Subroweit, M., Peissker, F., Sabha, N., Hosseini, S. E., Horrobin, M., Straubmeier, C., Fazeli, N., Borkar, A., Kunneriath, D., Karas, V., Rauch, C., Britzen, S., Zensus, A., Garcia-Marin, M., Rashed, Y. E.
Bright Active Galactic Nuclei are powered by accretion of mass onto the super massive black holes at the centers of the host galaxies. For fainter objects star formation may significantly contribute to the luminosity. We summarize experimental indica
Externí odkaz:
http://arxiv.org/abs/1712.06915
Autor:
Eckart, A., Valencia-S., M., Shahzamanian, B., Zajacek, M., Moser, L., Parsa, M., Subroweit, M., Peissker, F., Sabha, N., Horrobin, M., Straubmeier, C., Borkar, A., Kunneriath, D., Karas, V., Rauch, C., Britzen, S., Zensus, A., García-Marín, M.
The Galactic Center is the closest galactic nucleus that can be studied with unprecedented angular resolution and sensitivity. We summarize recent basic observational results on Sagittarius A* and the conditions for star formation in the central stel
Externí odkaz:
http://arxiv.org/abs/1709.08963
Publikováno v:
Phys. Rev. Applied 10, 034016 (2018)
Throughout biology, hierarchy is a recurrent theme in the geometry of structures where strength is achieved with minimal use of material. Acting over vast timescales, evolution has brought about beautiful solutions to problems of optimisation that ar
Externí odkaz:
http://arxiv.org/abs/1703.05506
Publikováno v:
A&A 587, A37 (2016)
Context. The compact radio and near-infrared (NIR) source Sagittarius A* (Sgr A*) associated with the supermassive black hole in the Galactic center was observed at 7 mm in the context of a NIR triggered global Very Long Baseline Array (VLBA) campaig
Externí odkaz:
http://arxiv.org/abs/1512.07509
Autor:
Kilanski, L., Rauch, C., Tuomisto, F., Podgorni, A., Dynowska, E., Dobrowolski, W., Fedorchenko, I. V., Marenkin, S. F.
Positron annihilation spectroscopy is used to study point defects in Zn/1-x/Mn/x/GeAs/2/ crystals with low Mn content 0 < x < 0.042 with disordered zincblende and chalcopyrite structure. The role of negatively charged vacancies and non-open-volume de
Externí odkaz:
http://arxiv.org/abs/1404.1179
Autor:
Eckart, Andreas, Horrobin, M., Britzen, S., Zamaninasab, M., Muzic, K., Sabha, N., Shahzamanian, B., Yazici, S., Moser, L., Garcia-Mari, M., Valencia-S., M., Borkar, A., Bursa, M., Karssen, G., Karas, V., Zajacek, M., Bronfman, L., Finger, R., Jalali, B., Vitale, M., Rauch, C., Kunneriath, D., Moultaka, J., Straubmeier, C., Rashed, Y. E., Markakis, K., Zensus, A.
A fast moving infrared excess source (G2) which is widely interpreted as a core-less gas and dust cloud approaches Sagittarius A* (SgrA*) on a presumably elliptical orbit. VLT K_s-band and Keck K'-band data result in clear continuum identifications a
Externí odkaz:
http://arxiv.org/abs/1311.2753
Autor:
Eckart, Andreas, Britzen, S., Horrobin, M., Zamaninasab, M., Muzic, K., Sabha, N., Shahzamanian, B., Yazici, S., Moser, L., Zuther, J., Garcia-Marin, M., Valencia-S., M., Bursa, M., Karssen, G., Karas, V., Jalali, B., Vitale, M., Bremer, M., Fischer, S., Smajic, S., Rauch, C., Kunneriath, D., Moultaka, J., Straubmeier, C., Rashed, Y. E., Iserlohe, C., Busch, G., Markakis, K., Borkar, A., Zensus, A.
The super-massive 4 million solar mass black hole (SMBH) SgrA* shows flare emission from the millimeter to the X-ray domain. The nucleus of the Milky Way has properties (stellar cluster, young stars, molecular gas and an accreting SMBH) that resemble
Externí odkaz:
http://arxiv.org/abs/1311.2743
Autor:
Eckart, A., Sabha, N., Witzel, G., Straubmeier, C., Shahzamanian, B., Valencia-S., M., Garcia-Marin, M., Horrobin, M., Moser, L., Zuther, J., Fischer, S., Rauch, C., Rost, S., Iserlohe, C., Yazici, S., Smajic, S., Wiest, M., Araujo-Hauck, C., Wank, I.
The super-massive 4 million solar mass black hole (SMBH) SgrA* shows variable emission from the millimeter to the X-ray domain. A detailed analysis of the infrared light curves allows us to address the accretion phenomenon in a statistical way. The a
Externí odkaz:
http://arxiv.org/abs/1208.1129
Acceptor-type defects in highly n-type InN are probed using positron annihilation spectroscopy. Results are compared to Hall effect measurements and calculated electron mobilities. Based on this, self-compensation in n-type InN is studied and the mic
Externí odkaz:
http://arxiv.org/abs/1204.3299