113 citations · 175 across the 5 of their papers we have counts for
5 papers
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B. W. Holwerda, W. C. Keel
Interstellar dust is still a dominant uncertainty in Astronomy, limiting precision in e.g., cosmological distance estimates and models of how light is re-processed within a galaxy.…
Extended X-ray emission in the IC 2497 - Hanny's Voorwerp system: energy injection in the gas around a fading AGN
Lia F. Sartori, Kevin Schawinski, Michael Koss +6
We present deep Chandra X-ray observations of the core of IC 2497, the galaxy associated with Hanny's Voorwerp and hosting a fading AGN. We find extended soft X-ray emission from h…
Hanny's Voorwerp: Evidence of AGN activity and a nuclear starburst in the central regions of IC 2497
H. Rampadarath, M. A. Garrett, G. I. G. Józsa +7
We present high- and intermediate resolution radio observations of the central region in the spiral galaxy IC 2497, performed using the European VLBI Network (EVN) at 18 cm, and th…
Variability and stability in blazar jets on time scales of years: Optical polarization monitoring of OJ287 in 2005-2009
C. Villforth, K. Nilsson, J. Heidt +45
(Abridged) OJ287 is a BL Lac object that has shown double-peaked bursts at regular intervals of ~12 yr during the last ~40 yr. We analyse optical photopolarimetric monitoring data…
Active Nuclei and Star-Forming Objects at z>2: Metallicities, Winds, and Formation Histories
W. C. Keel, W. Wu, I. Waddington +2
We present near-IR observations of AGN and star-forming objects in the field of the radio galaxy 53W002 at z=2.39. The star-forming objects, of special interest as candidate protog…