Professor Michele Fumagalli's Outputs (114)

The first AllWISE proper motion discovery : WISEA J070720.50+170532.7 (2014)
Journal Article
Wright, E., Kirkpatrick, J., Gelino, C., Fajardo-Acosta, S., Mace, G., Eisenhardt, P., …Burgasser, A. (2014). The first AllWISE proper motion discovery : WISEA J070720.50+170532.7. Astronomical Journal, 147(3), Article 61. https://doi.org/10.1088/0004-6256/147/3/61

While quality checking a new motion-aware co-addition of all 12.5 months of Wide-field Infrared Survey Explorer (WISE) data, we found that the source WISE J070720.48+170533.0 moved 0.''9 in six months. Backtracking this motion allowed us to identify... Read More about The first AllWISE proper motion discovery : WISEA J070720.50+170532.7.

Confronting Simulations of Optically Thick Gas in Massive Halos with Observations at z = 2-3 (2014)
Journal Article
Fumagalli, M., Hennawi, J., Prochaska, J., Kasen, D., Dekel, A., Ceverino, D., & Primack, J. (2014). Confronting Simulations of Optically Thick Gas in Massive Halos with Observations at z = 2-3. Astrophysical Journal, 780(1), Article 74. https://doi.org/10.1088/0004-637x/780/1/74

Cosmological hydrodynamic simulations predict the physical state of baryons in the circumgalactic medium (CGM), which can be directly tested via quasar absorption line observations. We use high-resolution "zoom-in" simulations of 21 galaxies to chara... Read More about Confronting Simulations of Optically Thick Gas in Massive Halos with Observations at z = 2-3.

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.

SLUG: Stochastically Lighting Up Galaxies. I. Methods and Validating Tests (2012)
Journal Article
da Silva, R., Fumagalli, M., & Krumholz, M. (2012). SLUG: Stochastically Lighting Up Galaxies. I. Methods and Validating Tests. Astrophysical Journal, 745(2), Article 145. https://doi.org/10.1088/0004-637x/745/2/145

The effects of stochasticity on the luminosities of stellar populations are an often neglected but crucial element for understanding populations in the low-mass or the low star formation rate regime. To address this issue, we present SLUG, a new code... Read More about SLUG: Stochastically Lighting Up Galaxies. I. Methods and Validating Tests.

Broad-line Reverberation in the Kepler-field Seyfert Galaxy Zw 229-015 (2011)
Journal Article
Barth, A., Nguyen, M., Malkan, M., Filippenko, A., Li, W., Gorjian, V., …Zeisse, C. (2011). Broad-line Reverberation in the Kepler-field Seyfert Galaxy Zw 229-015. Astrophysical Journal, 732(2), Article 121. https://doi.org/10.1088/0004-637x/732/2/121

The Seyfert 1 galaxy Zw 229-015 is among the brightest active galaxies being monitored by the Kepler mission. In order to determine the black hole mass in Zw 229-015 from Hβ reverberation mapping, we have carried out nightly observations with the Kas... Read More about Broad-line Reverberation in the Kepler-field Seyfert Galaxy Zw 229-015.