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Arecibo-Green Bank-LOFAR Carbon Radio Recombination Line observations toward cold HI Clouds
D. Anish Roshi, W. M. Peters, K. L. Emig +4
We present results from a search for radio recombination lines in three HI self-absorbing (HISA) clouds at 750 MHz and 321 MHz with the Robert C. Byrd Green Bank Telescope (GBT), a…
Sub-arcsecond imaging with the International LOFAR Telescope I. Foundational calibration strategy and pipeline
L. K. Morabito, N. J. Jackson, S. Mooney +71
[abridged] The International LOFAR Telescope is an interferometer with stations spread across Europe. With baselines of up to ~2,000 km, LOFAR has the unique capability of achievin…
A compact core-jet structure in the changing-look Seyfert NGC 2617
Jun Yang, Zsolt Paragi, Robert J. Beswick +9
The nearby face-on spiral galaxy NGC 2617 underwent an unambiguous 'inside-out' multi-wavelength outburst in Spring 2013, and a dramatic Seyfert type change probably between 2010 a…
A parsec-scale faint jet in the nearby changing-look Seyfert galaxy Mrk 590
J. Yang, I. van Bemmel, Z. Paragi +9
Broad Balmer emission lines in active galactic nuclei (AGN) may display dramatic changes in amplitude, even disappearance and re-appearance in some sources. As a nearby galaxy at a…