Publications (15)
The Close AGN Reference Survey (CARS). A massive multi-phase outflow impacting the edge-on galaxy HE1353-1917
B. Husemann, J. Scharwächter, T. A. Davis +15
[Abridged] We combine extensive spatially-resolved multi-wavelength observations, taken as part of the Close AGN Reference Survey (CARS), for the edge-on disc galaxy HE1353-1917 to…
The Close AGN Reference Survey (CARS): Mrk 1018 halts dimming and experiences strong short-term variability
M. Krumpe, B. Husemann, G. R. Tremblay +12
After changing optical AGN type from 1.9 to 1 in 1984, the AGN Mrk 1018 recently reverted back to its type 1.9 state. Our ongoing monitoring now reveals that the AGN has halted its…
High-resolution observations of SDSS J080800.99+483807.7 in the optical and radio domains. A possible example of jet-triggered star formation
Y. E. Rashed, J. Zuther, A. Eckart +5
Double-lobe radio galaxies are ideally suited to investigate the interaction of the individual components of the radio structure with the intergalactic medium and the interstellar…
The Close AGN Reference Survey (CARS) - Mrk 1018 returns to the shadows after 30 years as a Seyfert 1
R. E. McElroy, B. Husemann, S. M. Croom +10
We report the discovery that the known `changing look' AGN Mrk 1018 has changed spectral type for a second time. New VLT-MUSE data taken in 2015 as part of the Close AGN Reference…
The Galactic Center as a Paradigm for Low Luminosity Nuclei? The K-band identification of the DSO/G2 source from VLT and Keck data
Andreas Eckart, S. Britzen, M. Horrobin +27
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 cl…
The Close AGN Reference Survey (CARS). Discovery of a global [CII] 158 m line excess in AGN HE1353-1917
I. Smirnova-Pinchukova, B. Husemann, G. Busch +15
The [CII]158m line is one of the strongest far-infrared (FIR) lines and an important coolant in the interstellar medium of galaxies that is accessible out to high redshifts. Th…
Experimental Indicators of Accretion Processes in Active Galactic Nuclei
A. Eckart, M. Valencia-S., B. Shahzamanian +19
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 signif…
Spatially-resolved spectroscopy of narrow-line Seyfert 1 host galaxies
J. Scharwächter, B. Husemann, G. Busch +2
We present optical integral field spectroscopy for five narrow-line Seyfert 1 galaxies (NLS1s) host galaxies, probing their host galaxies at kpc scales. Emi…
The Close AGN Reference Survey (CARS) - What is causing Mrk1018's return to the shadows after 30 years?
B. Husemann, T. Urrutia, G. R. Tremblay +11
We recently discovered that the active galactic nucleus (AGN) of Mrk 1018 has changed optical type again after 30 years as a type 1 AGN. Here we combine Chandra, NuStar, Swift, Hub…
Line and Continuum Variability in Active Galaxies
Y. E. Rashed, A. Eckart, M. Valencia-S. +5
We compared optical spectroscopic and photometric data for 18 AGN galaxies over 2 to 3 epochs, with time intervals of typically 5 to 10 years. We used the Multi-Object Double Spect…
The Close AGN Reference Survey (CARS): SOFIA detects spatially-resolved [CII] emission in the luminous AGN HE0433-1028
G. Busch, B. Husemann, I. Smirnova-Pinchukova +18
We report spatially-resolved [CII] m observations of HE 0433-1028, which is the first detection of a nearby luminous AGN (redshift 0.0355) with FIFI-LS onboard the airbo…
The Close AGN Reference Survey (CARS): No evidence of galaxy-scale hot outflows in two nearby AGN
M. C. Powell, B. Husemann, G. R. Tremblay +13
Aims: We probe the radiatively-efficient, hot wind feedback mode in two nearby luminous unobscured (type 1) AGN from the Close AGN Reference Survey (CARS), which show intriguing kp…
Are Narrow Line Seyfert 1s a special class of Active Galactic Nuclei?
M. Valencia-S., J. Zuther, A. Eckart +12
No. Due to their apparently extreme optical to X-ray properties, Narrow Line Seyfert 1s (NLSy1s) have been considered a special class of active galactic nuclei (AGN). Here, we summ…
The nuclear gas disk of NGC 1566 dissected by SINFONI and ALMA
S. SmajiÄ, L. Moser, A. Eckart +5
We present the results of near-infrared H- and K-band European Southern Observatory SINFONI integral field spectroscopy of the Seyfert galaxy NGC 1566. We investigate the central k…
The Multifrequency Behavior of Sagittarius A*
A. Eckart, M. Zajacek, M. Parsa +15
The Galactic Center is the closest galactic nucleus that allows us to determine the multi-frequency behavior of the supermassive black hole counterpart Sagittarius A* in great deta…