All Outputs (114)

SLUG – stochastically lighting up galaxies – III. A suite of tools for simulated photometry, spectroscopy, and Bayesian inference with stochastic stellar populations (2015)
Journal Article
Krumholz, M., Fumagalli, M., da Silva, R., Rendahl, T., & Parra, J. (2015). SLUG – stochastically lighting up galaxies – III. A suite of tools for simulated photometry, spectroscopy, and Bayesian inference with stochastic stellar populations. Monthly Notices of the Royal Astronomical Society, 452(2), 1447-1467. https://doi.org/10.1093/mnras/stv1374

Stellar population synthesis techniques for predicting the observable light emitted by a stellar population have extensive applications in numerous areas of astronomy. However, accurate predictions for small populations of young stars, such as those... Read More about SLUG – stochastically lighting up galaxies – III. A suite of tools for simulated photometry, spectroscopy, and Bayesian inference with stochastic stellar populations.

The neutral hydrogen cosmological mass density at z = 5 (2015)
Journal Article
Crighton, N., Murphy, M., Prochaska, J., Worseck, G., Rafelski, M., Becker, G., …O'Meara, J. (2015). The neutral hydrogen cosmological mass density at z = 5. Monthly Notices of the Royal Astronomical Society, 452(1), 217-234. https://doi.org/10.1093/mnras/stv1182

We present the largest homogeneous survey of z > 4.4 damped Lyα systems (DLAs) using the spectra of 163 QSOs that comprise the Giant Gemini GMOS (GGG) survey. With this survey we make the most precise high-redshift measurement of the cosmological mas... Read More about The neutral hydrogen cosmological mass density at z = 5.

Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. VI. The role of bars in quenching star formation from z = 3 to the present epoch (2015)
Journal Article
Gavazzi, G., Consolandi, G., Dotti, M., Fanali, R., Fossati, M., Fumagalli, M., …Haynes, M. (2015). Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. VI. The role of bars in quenching star formation from z = 3 to the present epoch. Astronomy & Astrophysics, 580, https://doi.org/10.1051/0004-6361/201425351

A growing body of evidence indicates that the star formation rate per unit stellar mass (sSFR) decreases with increasing mass in normal main-sequence star-forming galaxies. Many processes have been advocated as being responsible for this trend (also... Read More about Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. VI. The role of bars in quenching star formation from z = 3 to the present epoch.

Two bright z > 6 quasars from VST ATLAS and a new method of optical plus mid-infrared colour selection (2015)
Journal Article
Carnall, A., Shanks, T., Chehade, B., Fumagalli, M., Rauch, M., Irwin, M., …Metcalfe, N. (2015). Two bright z > 6 quasars from VST ATLAS and a new method of optical plus mid-infrared colour selection. Monthly Notices of the Royal Astronomical Society: Letters, 451(1), L16-L20. https://doi.org/10.1093/mnrasl/slv057

We present the discovery of two z > 6 quasars, selected as i-band dropouts in the Very Large Telescope Survey Telescope ATLAS survey. Our first quasar has redshift, z = 6.31 ± 0.03, z-band magnitude, zAB = 19.63 ± 0.08 and rest frame 1450 Å absolute... Read More about Two bright z > 6 quasars from VST ATLAS and a new method of optical plus mid-infrared colour selection.

Unveiling the Secrets of Metallicity and Massive Star Formation Using DLAs along Gamma-Ray Bursts (2015)
Journal Article
Cucchiara, A., Fumagalli, M., Rafelski, M., Kocevski, D., Prochaska, J., Cooke, R., & Becker, G. (2015). Unveiling the Secrets of Metallicity and Massive Star Formation Using DLAs along Gamma-Ray Bursts. Astrophysical Journal, 804(1), https://doi.org/10.1088/0004-637x/804/1/51

We present the largest, publicly available sample of damped Lyα systems (DLAs) along the lines of sight of Swift-discovered gamma-ray bursts (GRBs) in order to investigate the environmental properties of long GRB hosts in the z = 1.8–6 redshift range... Read More about Unveiling the Secrets of Metallicity and Massive Star Formation Using DLAs along Gamma-Ray Bursts.

Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. V. The Coma supercluster survey completion (2015)
Journal Article
Gavazzi, G., Consolandi, G., Viscardi, E., Fossati, M., Savorgnan, G., Fumagalli, M., …Haynes, M. P. (2015). Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. V. The Coma supercluster survey completion. Astronomy & Astrophysics, 576, https://doi.org/10.1051/0004-6361/201425349

Neutral hydrogen represents the major observable baryonic constituent of galaxies that fuels the formation of stars through transformation of molecular hydrogen. The emission of the hydrogen recombination line Hα is the most direct tracer of the proc... Read More about Hα3: an Hα imaging survey of HI selected galaxies from ALFALFA. V. The Coma supercluster survey completion.

Legacy Extragalactic UV Survey (LEGUS) With the Hubble Space Telescope. I. Survey Description (2015)
Journal Article
Calzetti, D., Lee, J., Sabbi, E., Adamo, A., Smith, L., Andrews, J., …Wofford, A. (2015). Legacy Extragalactic UV Survey (LEGUS) With the Hubble Space Telescope. I. Survey Description. Astronomical Journal, 149(2), Article 51. https://doi.org/10.1088/0004-6256/149/2/51

The Legacy ExtraGalactic UV Survey (LEGUS) is a Cycle 21 Treasury program on the Hubble Space Telescope aimed at the investigation of star formation and its relation with galactic environment in nearby galaxies, from the scales of individual stars to... Read More about Legacy Extragalactic UV Survey (LEGUS) With the Hubble Space Telescope. I. Survey Description.

Investigating Broadband Variability of the TeV Blazar 1ES 1959+650 (2014)
Journal Article
Aliu, E., Archambault, S., Arlen, T., Aune, T., Barnacka, A., Beilicke, M., …Fumagalli, M. (2014). Investigating Broadband Variability of the TeV Blazar 1ES 1959+650. Astrophysical Journal, 797(2), Article 89. https://doi.org/10.1088/0004-637x/797/2/89

We summarize broadband observations of the TeV-emitting blazar 1ES 1959+650, including optical R-band observations by the robotic telescopes Super-LOTIS and iTelescope, UV observations by Swift Ultraviolet and Optical Telescope, X-ray observations by... Read More about Investigating Broadband Variability of the TeV Blazar 1ES 1959+650.

Directly imaging damped Ly α galaxies at z > 2 – III. The star formation rates of neutral gas reservoirs at z ∼ 2.7 (2014)
Journal Article
Fumagalli, M., O'Meara, J., Prochaska, J., Rafelski, M., & Kanekar, N. (2015). Directly imaging damped Ly α galaxies at z > 2 – III. The star formation rates of neutral gas reservoirs at z ∼ 2.7. Monthly Notices of the Royal Astronomical Society, 446(3), 3178-3198. https://doi.org/10.1093/mnras/stu2325

We present results from a survey designed to probe the star formation properties of 32 damped Lyman α systems (DLAs) at z ∼ 2.7. By using the ‘double-DLA’ technique that eliminates the glare of the bright background quasars, we directly measure the r... Read More about Directly imaging damped Ly α galaxies at z > 2 – III. The star formation rates of neutral gas reservoirs at z ∼ 2.7.

The Giant Gemini GMOS survey of zem > 4.4 quasars – I. Measuring the mean free path across cosmic time (2014)
Journal Article
Worseck, G., Prochaska, J., O'Meara, J., Becker, G., Ellison, S., Lopez, S., …Fumagalli, M. (2014). The Giant Gemini GMOS survey of zem > 4.4 quasars – I. Measuring the mean free path across cosmic time. Monthly Notices of the Royal Astronomical Society, 445(2), 1745-1760. https://doi.org/10.1093/mnras/stu1827

We have obtained spectra of 163 quasars at zem > 4.4 with the Gemini Multi Object Spectrometers, the largest publicly available sample of high-quality, low-resolution spectra at these redshifts. From this data set, we generated stacked quasar spectra... Read More about The Giant Gemini GMOS survey of zem > 4.4 quasars – I. Measuring the mean free path across cosmic time.

SLUG - Stochastically Lighting Up Galaxies - II. Quantifying the effects of stochasticity on star formation rate indicators (2014)
Journal Article
da Silva, R. L., Fumagalli, M., & Krumholz, M. R. (2014). SLUG - Stochastically Lighting Up Galaxies - II. Quantifying the effects of stochasticity on star formation rate indicators. Monthly Notices of the Royal Astronomical Society, 444(4), 3275-3287. https://doi.org/10.1093/mnras/stu1688

The integrated light of a stellar population, measured through photometric filters that are sensitive to the presence of young stars, is often used to infer the star formation rate (SFR) for that population. However, these techniques rely on an assum... Read More about SLUG - Stochastically Lighting Up Galaxies - II. Quantifying the effects of stochasticity on star formation rate indicators.

Metal-enriched, subkiloparsec gas clumps in the circumgalactic medium of a faint z = 2.5 galaxy (2014)
Journal Article
Crighton, N., Hennawi, J., Simcoe, R., Cooksey, K., Murphy, M., Fumagalli, M., …Shanks, T. (2015). Metal-enriched, subkiloparsec gas clumps in the circumgalactic medium of a faint z = 2.5 galaxy. Monthly Notices of the Royal Astronomical Society, 446(1), 18-37. https://doi.org/10.1093/mnras/stu2088

We report the serendipitous detection of a 0.2 L*, Lyα emitting galaxy at redshift 2.5 at an impact parameter of 50 kpc from a bright background QSO sightline. A high-resolution spectrum of the QSO reveals a partial Lyman-limit absorption system (NHi... Read More about Metal-enriched, subkiloparsec gas clumps in the circumgalactic medium of a faint z = 2.5 galaxy.

MUSE sneaks a peek at extreme ram-pressure stripping events – I. A kinematic study of the archetypal galaxy ESO137-001 (2014)
Journal Article
Fumagalli, M., Fossati, M., Hau, G., Gavazzi, G., Bower, R., Sun, M., & Boselli, A. (2014). MUSE sneaks a peek at extreme ram-pressure stripping events – I. A kinematic study of the archetypal galaxy ESO137-001. Monthly Notices of the Royal Astronomical Society, 445(4), 4335-4344. https://doi.org/10.1093/mnras/stu2092

We present Multi Unit Spectroscopic Explorer (MUSE) observations of ESO137−001, a spiral galaxy infalling towards the centre of the massive Norma cluster at z ∼ 0.0162. During the high-velocity encounter of ESO137−001 with the intracluster medium, a... Read More about MUSE sneaks a peek at extreme ram-pressure stripping events – I. A kinematic study of the archetypal galaxy ESO137-001.

Directly imaging damped Lyα galaxies at z > 2 – II. Imaging and spectroscopic observations of 32 quasar fields (2014)
Journal Article
Fumagalli, M., O'Meara, J., Prochaska, X., Kanekar, N., & Wolfe, A. (2014). Directly imaging damped Lyα galaxies at z > 2 – II. Imaging and spectroscopic observations of 32 quasar fields. Monthly Notices of the Royal Astronomical Society, 444(2), 1282-1300. https://doi.org/10.1093/mnras/stu1512

Damped Lyα absorbers (DLAs) are a well-studied class of absorption line systems, and yet the properties of their host galaxies remain largely unknown. To investigate the origin of these systems, we have conducted an imaging survey of 32 quasar fields... Read More about Directly imaging damped Lyα galaxies at z > 2 – II. Imaging and spectroscopic observations of 32 quasar fields.

The GALEX Ultraviolet Virgo Cluster Survey (GUViCS). IV. The role of the cluster environment on galaxy evolution (2014)
Journal Article
Boselli, A., Voyer, E., Boissier, S., Cucciati, O., Consolandi, G., Cortese, L., …Toloba, E. (2014). The GALEX Ultraviolet Virgo Cluster Survey (GUViCS). IV. The role of the cluster environment on galaxy evolution. Astronomy & Astrophysics, 570, https://doi.org/10.1051/0004-6361/201424419

We study the role of the environment on galaxy evolution using a sample of 868 galaxies in the Virgo cluster and in its surrounding regions that are selected from the GALEX Ultraviolet Virgo Cluster Survey (GUViCS) with the purpose of understanding t... Read More about The GALEX Ultraviolet Virgo Cluster Survey (GUViCS). IV. The role of the cluster environment on galaxy evolution.

A compact, metal-rich, kpc-scale outflow in FBQS J0209-0438: detailed diagnostics from HST/COS extreme UV observations (2014)
Journal Article
Finn, C. W., Morris, S. L., Crighton, N. H., Hamann, F., Done, C., Theuns, T., …Worseck, G. (2014). A compact, metal-rich, kpc-scale outflow in FBQS J0209-0438: detailed diagnostics from HST/COS extreme UV observations. Monthly Notices of the Royal Astronomical Society, 440(4), 3317-3340. https://doi.org/10.1093/mnras/stu518

We present HST/COS observations of highly ionized absorption lines associated with a radio-loud quasar (QSO) at z = 1.1319. The absorption system has multiple velocity components, with an overall width of ≈600 km s−1, tracing gas that is largely outf... Read More about A compact, metal-rich, kpc-scale outflow in FBQS J0209-0438: detailed diagnostics from HST/COS extreme UV observations.

The nature of massive black hole binary candidates - II. Spectral energy distribution atlas (2014)
Journal Article
Lusso, E., Decarli, R., Dotti, M., Montuori, C., Hogg, D., Tsalmantza, P., …Prochaska, J. (2014). The nature of massive black hole binary candidates - II. Spectral energy distribution atlas. Monthly Notices of the Royal Astronomical Society, 441(1), 316-332. https://doi.org/10.1093/mnras/stu572

Recoiling supermassive black holes (SMBHs) are considered one plausible physical mechanism to explain high velocity shifts between narrow and broad emission lines sometimes observed in quasar spectra. If the sphere of influence of the recoiling SMBH... Read More about The nature of massive black hole binary candidates - II. Spectral energy distribution atlas.

An analytic method to compute star cluster luminosity statistics (2014)
Journal Article
da Silva, R., Krumholz, M., Fumagalli, M., & Fall, S. (2014). An analytic method to compute star cluster luminosity statistics. Monthly Notices of the Royal Astronomical Society, 438(3), 2355-2370. https://doi.org/10.1093/mnras/stt2351

The luminosity distribution of the brightest star clusters in a population of galaxies encodes critical pieces of information about how clusters form, evolve and disperse, and whether and how these processes depend on the large-scale galactic environ... Read More about An analytic method to compute star cluster luminosity statistics.

Towards a unified description of the intergalactic medium at redshift z ≈ 2.5 (2014)
Journal Article
Prochaska, J., Madau, P., O'Meara, J., & Fumagalli, M. (2014). Towards a unified description of the intergalactic medium at redshift z ≈ 2.5. Monthly Notices of the Royal Astronomical Society, 438(1), 476-486. https://doi.org/10.1093/mnras/stt2218

We examine recent measurements of the z ≈ 2.5 intergalactic medium (IGM) which constrain the H I frequency distribution f(NHI) and the mean free path λ912mfp to ionizing radiation. We argue that line-blending and the clustering of strong absorption-l... Read More about Towards a unified description of the intergalactic medium at redshift z ≈ 2.5.

The Rapid Decline in Metallicity of Damped Lyα Systems at z ~ 5 (2014)
Journal Article
Rafelski, M., Neeleman, M., Fumagalli, M., Wolfe, A., & Prochaska, J. (2014). The Rapid Decline in Metallicity of Damped Lyα Systems at z ~ 5. Astrophysical Journal Letters, 782(2), Article L29. https://doi.org/10.1088/2041-8205/782/2/l29

We present evidence that the cosmological mean metallicity of neutral atomic hydrogen gas shows a sudden decrease at z > 4.7 down to $\langle {Z}\rangle =-2.03^{+0.09}_{-0.11}$, which is 6σ deviant from that predicted by a linear fit to the data at l... Read More about The Rapid Decline in Metallicity of Damped Lyα Systems at z ~ 5.