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Metal abundances in the high-redshift intergalactic medium
Michele Fumagalli
Twenty years of high-resolution spectroscopy at the 8-10 m class telescopes have drastically expanded our view of the gas-phase metallicity in the z>2 universe. This contribution b…
Long term observations of B2 1215+30 with VERITAS
VERITAS collaboration, E. Aliu, S. Archambault +82
We report on VERITAS observations of the BL Lac object B2 1215+30 between 2008 and 2012. During this period, the source was detected at very high energies (VHE; E > 100 GeV) by VER…
The First AllWISE Proper Motion Discovery: WISEA J070720.50+170532.7
Edward L. Wright, J. Davy Kirkpatrick, Christopher R. Gelino +12
While quality checking a new motion-aware co-addition of all 12.5 months of WISE data, the source WISE J070720.48+170533.0 was found to have moved 0.9 arc-sec in 6 months. Backtrac…
The nature of massive black hole binary candidates: I. Spectral properties and evolution
Roberto Decarli, Massimo Dotti, Michele Fumagalli +5
Theoretically, bound binaries of massive black holes are expected as the natural outcome of mergers of massive galaxies. From the observational side, however, massive black hole bi…
The Firm Redshift Lower Limit of the Most Distant TeV-Detected Blazar PKS 1424+240
A. Furniss, D. A. Williams, C. Danforth +7
We present the redshift lower limit of z>0.6035 for the very-high-energy (VHE; E>100 GeV) emitting blazar PKS 1424+240 (PG 1424+240). This limit is inferred from Lyman beta and gam…
Halpha3: an Halpha imaging survey of HI selected galaxies from ALFALFA. III. Nurture shapes up the Hubble sequence in the Great Wall
Giuseppe Gavazzi, Giulia Savorgnan, Matteo Fossati +7
We present the analysis of Halpha3, an Halpha imaging survey of galaxies selected from the HI ALFALFA Survey in the Coma Supercluster. By using the Halpha line as a tracer of the "…
Halpha3: an Halpha imaging survey of HI selected galaxies from ALFALFA. II. The star formation properties of galaxies in the Virgo cluster and surroundings
Giuseppe Gavazzi, Michele Fumagalli, Matteo Fossati +5
We present the analysis of Halpha3, an Halpha imaging survey of 409 galaxies selected from the HI Arecibo ALFALFA Survey in the Local Supercluster, including the Virgo cluster. We…
On the Redshift of the Very High Energy Blazar 3C 66A
Amy Furniss, Michele Fumagalli, Charles Danforth +2
As a bright gamma-ray source, 3C 66A is of great interest to the high-energy astrophysics community, having a potential for placing cosmological constraints on models for the extra…