Professor Michele Fumagalli's Outputs (10)

Long Term Observations of B2 1215+30 with VERITAS (2013)
Journal Article
Aliu, E., Archambault, S., Arlen, T., Aune, T., Beilicke, M., Benbow, W., …Collaboration, V. (2013). Long Term Observations of B2 1215+30 with VERITAS. Astrophysical Journal, 779(2), Article 92. https://doi.org/10.1088/0004-637x/779/2/92

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 (VHEs; E > 100 GeV) by VERITAS with a significance of 8.9σ and showed clear variability on time... Read More about Long Term Observations of B2 1215+30 with VERITAS.

Dissecting the Properties of Optically Thick Hydrogen at the Peak of Cosmic Star Formation History (2013)
Journal Article
Fumagalli, M., O'Meara, J., Prochaska, J., & Worseck, G. (2013). Dissecting the Properties of Optically Thick Hydrogen at the Peak of Cosmic Star Formation History. Astrophysical Journal, 775(1), Article 78. https://doi.org/10.1088/0004-637x/775/1/78

We present the results of a blind survey of Lyman limit systems (LLSs) detected in absorption against 105 quasars at z ~ 3 using the blue sensitive MagE spectrograph at the Magellan Clay telescope. By searching for Lyman limit absorption in the wavel... Read More about Dissecting the Properties of Optically Thick Hydrogen at the Peak of Cosmic Star Formation History.

The nature of massive black hole binary candidates - I. Spectral properties and evolution (2013)
Journal Article
Decarli, R., Dotti, M., Fumagalli, M., Tsalmantza, P., Montuori, C., Lusso, E., …Prochaska, J. (2013). The nature of massive black hole binary candidates - I. Spectral properties and evolution. Monthly Notices of the Royal Astronomical Society, 433(2), 1492-1504. https://doi.org/10.1093/mnras/stt831

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 binaries remain elusive. Velocity shifts between narrow and broad emissi... Read More about The nature of massive black hole binary candidates - I. Spectral properties and evolution.

The Blazar Emission Environment: Insight from Soft X-Ray Absorption (2013)
Journal Article
Furniss, A., Fumagalli, M., Falcone, A., & Williams, D. (2013). The Blazar Emission Environment: Insight from Soft X-Ray Absorption. Astrophysical Journal, 770(1), Article 109. https://doi.org/10.1088/0004-637x/770/2/109

Collecting experimental insight into the relativistic particle populations and emission mechanisms at work within TeV-emitting blazar jets, which are spatially unresolvable in most bands and have strong beaming factors, is a daunting task. New observ... Read More about The Blazar Emission Environment: Insight from Soft X-Ray Absorption.

Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. IV. Structure of galaxies in the Local and Coma superclusters (2013)
Journal Article
Fossati, M., Gavazzi, G., Savorgnan, G., Fumagalli, M., Boselli, A., Gutiérrez, L., …Haynes, M. (2013). Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. IV. Structure of galaxies in the Local and Coma superclusters. Astronomy & Astrophysics, 553, Article A91. https://doi.org/10.1051/0004-6361/201220915

Context. We present the analysis of the galaxy structural parameters from Hα3, an Hα narrow-band imaging follow-up survey of ~800 galaxies selected from the HI Arecibo Legacy Fast ALFA Survey (ALFALFA) in the Local supercluster, including the Virgo c... Read More about Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. IV. Structure of galaxies in the Local and Coma superclusters.

Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. II. Star formation properties of galaxies in the Virgo cluster and surroundings (2013)
Journal Article
Gavazzi, G., Fumagalli, M., Fossati, M., Galardo, V., Grossetti, F., Boselli, A., …Haynes, M. (2013). Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. II. Star formation properties of galaxies in the Virgo cluster and surroundings. Astronomy & Astrophysics, 553, Article A89. https://doi.org/10.1051/0004-6361/201218789

Context. We present the analysis of Hα3, an Hα narrow-band imaging follow-up survey of 409 galaxies selected from the HI Arecibo Legacy Fast ALFA Survey (ALFALFA) in the Local Supercluster, including the Virgo cluster, in the region 11h < RA < 16h ; ... Read More about Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. II. Star formation properties of galaxies in the Virgo cluster and surroundings.

Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. III. Nurture builds up the Hubble sequence in the Great Wall (2013)
Journal Article
Gavazzi, G., Savorgnan, G., Fossati, M., Dotti, M., Fumagalli, M., Boselli, A., …Haynes, M. (2013). Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. III. Nurture builds up the Hubble sequence in the Great Wall. Astronomy & Astrophysics, 553, Article A90. https://doi.org/10.1051/0004-6361/201220916

Context. We present the analysis of Hα3, an Hα narrow-band imaging follow-up survey of galaxies selected from the HI Arecibo Legacy Fast ALFA Survey (ALFALFA) in the Coma supercluster. Aims. Taking advantage of Hα3, which provides the complete census... Read More about Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. III. Nurture builds up the Hubble sequence in the Great Wall.

Caught in the act: discovery of a physical quasar triplet (2013)
Journal Article
Farina, E., Montuori, C., Decarli, R., & Fumagalli, M. (2013). Caught in the act: discovery of a physical quasar triplet. Monthly Notices of the Royal Astronomical Society, 431(2), 1019-1025. https://doi.org/10.1093/mnras/stt209

We present the discovery of a triplet of quasars at z ≈ 1.51. The whole system is well accommodated within 25 arcsec (i.e. 200 kpc in projected distance). The velocity differences among the three objects (as measured through the broad Mg II emission... Read More about Caught in the act: discovery of a physical quasar triplet.

The Firm Redshift Lower Limit of the Most Distant TeV-detected Blazar PKS 1424+240 (2013)
Journal Article
Furniss, A., Williams, D., Danforth, C., Fumagalli, M., Prochaska, J., Primack, J., …Neely, W. (2013). The Firm Redshift Lower Limit of the Most Distant TeV-detected Blazar PKS 1424+240. Astrophysical Journal Letters, 768(2), Article L31. https://doi.org/10.1088/2041-8205/768/2/l31

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 Lyβ and Lyγ absorption observed in the far-ultraviolet spectra from the Hubble Space... Read More about The Firm Redshift Lower Limit of the Most Distant TeV-detected Blazar PKS 1424+240.

On the Redshift of the Very High Energy Blazar 3C 66A (2013)
Journal Article
Furniss, A., Fumagalli, M., Danforth, C., Williams, D., & Prochaska, J. (2013). On the Redshift of the Very High Energy Blazar 3C 66A. Astrophysical Journal, 766(1), Article 35. https://doi.org/10.1088/0004-637x/766/1/35

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 extragalactic background light (EBL) and the processes which contribute to... Read More about On the Redshift of the Very High Energy Blazar 3C 66A.