The MUSE Ultra Deep Field (MUDF). III. Hubble Space Telescope WFC3 Grism Spectroscopy and Imaging (2023)
Journal Article
Revalski, M., Rafelski, M., Fumagalli, M., Fossati, M., Pirzkal, N., Sunnquist, B., …Peroux, C. (2023). The MUSE Ultra Deep Field (MUDF). III. Hubble Space Telescope WFC3 Grism Spectroscopy and Imaging. Astrophysical Journal Supplement, 265(2), Article 40. https://doi.org/10.3847/1538-4365/acb8ae

We present extremely deep Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) observations of the MUSE Ultra Deep Field. This unique region of the sky contains two quasars at z ≈ 3.22 that are separated by only ∼500 kpc, providing a stereoscopic... Read More about The MUSE Ultra Deep Field (MUDF). III. Hubble Space Telescope WFC3 Grism Spectroscopy and Imaging.

Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet (2023)
Journal Article
Beckett, A., Morris, S. L., Fumagalli, M., Tejos, N., Jannuzi, B., & Cantalupo, S. (2023). Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet. Monthly Notices of the Royal Astronomical Society, 521(1), 1113-1143. https://doi.org/10.1093/mnras/stad596

We examine to what extent disc and outflow models can reproduce observations of H I gas within a few virial radii of galaxies in pairs and groups. Using highly sensitive HST/COS and FOS spectra of the Q0107 quasar triplet covering Ly α for z≲1, as we... Read More about Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet.

Signatures of extended discs and outflows in the circumgalactic medium using the Q0107 quasar triplet (2022)
Journal Article
Beckett, A., Morris, S. L., Fumagalli, M., Tejos, N., Jannuzi, B., & Cantalupo, S. (2022). Signatures of extended discs and outflows in the circumgalactic medium using the Q0107 quasar triplet. Monthly Notices of the Royal Astronomical Society, 517(1), 1020-1047. https://doi.org/10.1093/mnras/stac2630

We use H I absorption along the lines-of-sight to the Q0107 quasar triplet in order to model potential disc and outflow structures in the circumgalactic medium of intervening galaxies at z ≲ 1, as well as the intergalactic medium on scales of up to a... Read More about Signatures of extended discs and outflows in the circumgalactic medium using the Q0107 quasar triplet.

Design of the VLT-CUBES image slicers: Field re-formatters to provide two spectral resolutions (2022)
Journal Article
Calcines, A., Wells, M., O’Brien, K., Morris, S., Seifert, W., Zanutta, A., …Di Marcantonio, P. (2023). Design of the VLT-CUBES image slicers: Field re-formatters to provide two spectral resolutions. Experimental Astronomy, 55(1), 267-280. https://doi.org/10.1007/s10686-022-09866-5

CUBES is a high efficiency spectrograph designed for a Cassegrain focus of the Very Large Telescope and is expected to be in operation in 2028. It is designed to observe point or compact sources in a spectral range from 300 to 405nm. CUBES will provi... Read More about Design of the VLT-CUBES image slicers: Field re-formatters to provide two spectral resolutions.

Probing the parameters of the intergalactic medium using quasars (2022)
Journal Article
Dalton, T., Morris, S. L., Fumagalli, M., & Gatuzz, E. (2022). Probing the parameters of the intergalactic medium using quasars. Monthly Notices of the Royal Astronomical Society, 513(1), 822-834. https://doi.org/10.1093/mnras/stac814

We continue our series of papers on intergalactic medium (IGM) tracers using quasi-stellar objects (QSOs), having examined gamma-ray bursts (GRBs) and blazars in earlier studies. We have estimated the IGM properties of hydrogen column density (⁠NHXIG... Read More about Probing the parameters of the intergalactic medium using quasars.

Probing the physical properties of the intergalactic medium using blazars (2021)
Journal Article
Dalton, T., Morris, S. L., Fumagalli, M., & Gatuzz, E. (2021). Probing the physical properties of the intergalactic medium using blazars. Monthly Notices of the Royal Astronomical Society, 508(2), 1701-1718. https://doi.org/10.1093/mnras/stab2597

We use Swift blazar spectra to estimate the key intergalactic medium (IGM) properties of hydrogen column density (NHXIGM), metallicity, and temperature over a redshift range of 0.03 ≤ z ≤ 4.7, using a collisional ionization equilibrium model for the... Read More about Probing the physical properties of the intergalactic medium using blazars.

The relationship between gas and galaxies at z < 1 using the Q0107 quasar triplet (2021)
Journal Article
Beckett, A., Morris, S. L., Fumagalli, M., Bielby, R., Tejos, N., Schaye, J., …Cantalupo, S. (2021). The relationship between gas and galaxies at z < 1 using the Q0107 quasar triplet. Monthly Notices of the Royal Astronomical Society, 506(2), 2574-2602. https://doi.org/10.1093/mnras/stab1630

We study the distribution and dynamics of the circumgalactic and intergalactic medium using a dense galaxy survey covering the field around the Q0107 system, a unique z ≈ 1 projected quasar triplet. With full Ly α coverage along all three lines-of-si... Read More about The relationship between gas and galaxies at z < 1 using the Q0107 quasar triplet.

Pair lines of sight observations of multiphase gas bearing O vi in a galaxy environment (2021)
Journal Article
Anshul, P., Narayanan, A., Muzahid, S., Beckett, A., & Morris, S. L. (2021). Pair lines of sight observations of multiphase gas bearing O vi in a galaxy environment. Monthly Notices of the Royal Astronomical Society, 503(3), 3243-3261. https://doi.org/10.1093/mnras/stab396

Using HST/COS spectra of the twin quasar lines of sight Q 0107–025A & Q 0107–025B, we report on the physical properties, chemical abundances, and transverse sizes of a multiphase medium in a galaxy field at z = 0.399. The angular separation between t... Read More about Pair lines of sight observations of multiphase gas bearing O vi in a galaxy environment.

Probing the physical properties of the intergalactic medium using gamma-ray bursts (2021)
Journal Article
Dalton, T., Morris, S. L., & Fumagalli, M. (2021). Probing the physical properties of the intergalactic medium using gamma-ray bursts. Monthly Notices of the Royal Astronomical Society, 502(4), 5981-5996. https://doi.org/10.1093/mnras/stab335

We use gamma-ray burst (GRB) spectra total continuum absorption to estimate the key intergalactic medium (IGM) properties of hydrogen column density (⁠NHXIGM⁠), metallicity, temperature, and ionization parameter over a redshift range of 1.6 ≤ z ≤ 6.3... Read More about Probing the physical properties of the intergalactic medium using gamma-ray bursts.

Quasar Sightline and Galaxy Evolution (QSAGE) survey - II. Galaxy overdensities around UV luminous quasars at z = 1-2 (2020)
Journal Article
Stott, J., Bielby, R., Cullen, F., Burchett, J., Tejos, N., Fumagalli, M., …Prochaska, J. (2020). Quasar Sightline and Galaxy Evolution (QSAGE) survey - II. Galaxy overdensities around UV luminous quasars at z = 1-2. Monthly Notices of the Royal Astronomical Society, 497(3), 3083-3096. https://doi.org/10.1093/mnras/staa2096

We demonstrate that the UV brightest quasars at z = 1–2 live in overdense environments. This is based on an analysis of deep Hubble Space Telescope WFC3 G141 grism spectroscopy of the galaxies along the lines-of-sight to UV luminous quasars in the re... Read More about Quasar Sightline and Galaxy Evolution (QSAGE) survey - II. Galaxy overdensities around UV luminous quasars at z = 1-2.

Using realistic host galaxy metallicities to improve the GRB X-ray equivalent total hydrogen column density and constrain the intergalactic medium density (2020)
Journal Article
Morris, S. L., & Dalton, T. (2020). Using realistic host galaxy metallicities to improve the GRB X-ray equivalent total hydrogen column density and constrain the intergalactic medium density. Monthly Notices of the Royal Astronomical Society, 495(2), 2342-2353. https://doi.org/10.1093/mnras/staa1321

It is known that the GRB equivalent hydrogen column density (NHX) changes with redshift and that, typically, NHX is greater than the GRB host neutral hydrogen column density. We have compiled a large sample of data for GRB NHX and metallicity [X/H].... Read More about Using realistic host galaxy metallicities to improve the GRB X-ray equivalent total hydrogen column density and constrain the intergalactic medium density.

Into the Lyα jungle: exploring the circumgalactic medium of galaxies at z ∼ 4 − 5 with MUSE (2020)
Journal Article
Bielby, R. M., Fumagalli, M., Fossati, M., Rafelski, M., Oppenheimer, B., Cantalupo, S., …Peroux, C. (2020). Into the Lyα jungle: exploring the circumgalactic medium of galaxies at z ∼ 4 − 5 with MUSE. Monthly Notices of the Royal Astronomical Society, 493(4), 5336-5356. https://doi.org/10.1093/mnras/staa546

We present a study of the galaxy environment of 9 strong H I+C IV absorption line systems (16.2 < log(N(HI)) < 21.2) spanning a wide range in metallicity at z ∼ 4 − 5, using MUSE integral field and X-Shooter spectroscopic data collected in a z ≈ 5.26... Read More about Into the Lyα jungle: exploring the circumgalactic medium of galaxies at z ∼ 4 − 5 with MUSE.

Simulating MOS science on the ELT: Lyα forest tomography (2019)
Journal Article
Japelj, J., Laigle, C., Puech, M., Pichon, C., Rahmani, H., Dubois, Y., …Yang, Y. (2019). Simulating MOS science on the ELT: Lyα forest tomography. Astronomy & Astrophysics, 632, https://doi.org/10.1051/0004-6361/201936048

Mapping the large-scale structure through cosmic time has numerous applications in studies of cosmology and galaxy evolution. At z ≳ 2, the structure can be traced by the neutral intergalactic medium (IGM) by way of observing the Lyα forest towards d... Read More about Simulating MOS science on the ELT: Lyα forest tomography.

MUSE Analysis of Gas around Galaxies (MAGG) - I: Survey design and the environment of a near pristine gas cloud at z ≈ 3.5 (2019)
Journal Article
Lofthouse, E. K., Fumagalli, M., Fossati, M., O’Meara, J. M., Murphy, M. T., Christensen, L., …Morris, S. L. (2020). MUSE Analysis of Gas around Galaxies (MAGG) - I: Survey design and the environment of a near pristine gas cloud at z ≈ 3.5. Monthly Notices of the Royal Astronomical Society, 491(2), 2057-2074. https://doi.org/10.1093/mnras/stz3066

We present the design, methods, and first results of the MUSE Analysis of Gas around Galaxies (MAGG) survey, a large programme on the Multi Unit Spectroscopic Explorer (MUSE) instrument at the Very Large Telescope (VLT) which targets 28 z > 3.2 quasa... Read More about MUSE Analysis of Gas around Galaxies (MAGG) - I: Survey design and the environment of a near pristine gas cloud at z ≈ 3.5.

The MUSE Ultra Deep Field (MUDF). II. Survey design and the gaseous properties of galaxy groups at 0.5 < z < 1.5 (2019)
Journal Article
Fossati, M., Fumagalli, M., Lofthouse, E., D’Odorico, V., Lusso, E., Cantalupo, S., …Theuns, T. (2019). The MUSE Ultra Deep Field (MUDF). II. Survey design and the gaseous properties of galaxy groups at 0.5 < z < 1.5. Monthly Notices of the Royal Astronomical Society, 490(1), 1451-1469. https://doi.org/10.1093/mnras/stz2693

We present the goals, design, and first results of the MUSE Ultra Deep Field (MUDF) survey, a large programme using the Multi Unit Spectroscopic Explorer (MUSE) instrument at the ESO Very Large Telescope. The MUDF survey is collecting ≈150 h on-sourc... Read More about The MUSE Ultra Deep Field (MUDF). II. Survey design and the gaseous properties of galaxy groups at 0.5 < z < 1.5.

A VLT/MUSE galaxy survey towards QSO Q1410: looking for a WHIM traced by BLAs in inter-cluster filaments† (2018)
Journal Article
Pessa, I., Tejos, N., Barrientos, L. F., Werk, J., Bielby, R., Padilla, N., …Hummels, C. (2018). A VLT/MUSE galaxy survey towards QSO Q1410: looking for a WHIM traced by BLAs in inter-cluster filaments†. Monthly Notices of the Royal Astronomical Society, 477(3), 2631-2653. https://doi.org/10.1093/mnras/sty723

Cosmological simulations predict that a significant fraction of the low-z baryon budget resides in large-scale filaments in the form of a diffuse plasma at temperatures T ∼ 105 − 107 K. However, direct observation of this so-called warm-hot intergala... Read More about A VLT/MUSE galaxy survey towards QSO Q1410: looking for a WHIM traced by BLAs in inter-cluster filaments†.

The VLT LBG redshift survey – VI. Mapping H i in the proximity of z ∼ 3 LBGs with X-Shooter (2017)
Journal Article
Bielby, R., Shanks, T., Crighton, N., Bornancini, C., Infante, L., Lambas, D., …Tummuangpak, P. (2017). The VLT LBG redshift survey – VI. Mapping H i in the proximity of z ∼ 3 LBGs with X-Shooter. Monthly Notices of the Royal Astronomical Society, 471(2), 2174-2186. https://doi.org/10.1093/mnras/stx1772

We present an analysis of the spatial distribution and dynamics of neutral hydrogen gas around galaxies using new X-Shooter observations of z ∼ 2.5–4 quasars. Adding the X-Shooter data to our existing data set of high-resolution quasar spectroscopy,... Read More about The VLT LBG redshift survey – VI. Mapping H i in the proximity of z ∼ 3 LBGs with X-Shooter.

Probing the intra-group medium of a z = 0.28 galaxy group (2017)
Journal Article
Bielby, R., Crighton, N., Fumagalli, M., Morris, S., Stott, J., Tejos, N., & Cantalupo, S. (2017). Probing the intra-group medium of a z = 0.28 galaxy group. Monthly Notices of the Royal Astronomical Society, 468(2), 1373-1386. https://doi.org/10.1093/mnras/stx528

We present new MUSE observations of a galaxy group probed by a background quasar. The quasar sightline passes between multiple z = 0.28 galaxies, whilst showing at the same redshift low-ionized metal line species, including Ca ii, Mg i, Mg ii and Fe ... Read More about Probing the intra-group medium of a z = 0.28 galaxy group.

A measurement of the z = 0 UV background from Halpha fluorescence (2017)
Journal Article
Fumagalli, M., Haardt, F., Theuns, T., Morris, S. L., Cantalupo, S., Madau, P., & Fossati, M. (2017). A measurement of the z = 0 UV background from Halpha fluorescence. Monthly Notices of the Royal Astronomical Society, 467(4), 4802-4816. https://doi.org/10.1093/mnras/stx398

We report the detection of extended Halpha emission from the tip of the HI disk of the nearby edge-on galaxy UGC 7321, observed with the Multi Unit Spectroscopic Explorer (MUSE) instrument at the Very Large Telescope. The Halpha surface brightness fa... Read More about A measurement of the z = 0 UV background from Halpha fluorescence.

MUSE searches for galaxies near very metal-poor gas clouds at z~3: new constraints for cold accretion models (2016)
Journal Article
Fumagalli, M., Cantalupo, S., Dekel, A., Morris, S., O'Meara, J., Prochaska, J., & Theuns, T. (2016). MUSE searches for galaxies near very metal-poor gas clouds at z~3: new constraints for cold accretion models. Monthly Notices of the Royal Astronomical Society, 462(2), 1978-1988. https://doi.org/10.1093/mnras/stw1782

We report on the search for galaxies in the proximity of two very metal-poor gas clouds at z ∼ 3 towards the quasar Q0956+122. With a 5-hour Multi-Unit Spectroscopic Explorer (MUSE) integration in a ∼500 × 500 kpc2 region centred at the quasar positi... Read More about MUSE searches for galaxies near very metal-poor gas clouds at z~3: new constraints for cold accretion models.