Dr Guillaume Mahler's Outputs (48)

Star formation at the smallest scales: a JWST study of the clump populations in SMACS0723 (2023)
Journal Article
Claeyssens, A., Adamo, A., Richard, J., Mahler, G., Messa, M., & Dessauges-Zavadsky, M. (2023). Star formation at the smallest scales: a JWST study of the clump populations in SMACS0723. Monthly Notices of the Royal Astronomical Society, 520(2), 2180-2203. https://doi.org/10.1093/mnras/stac3791

We present the clump populations detected in 18 lensed galaxies at redshifts 1--8.5 within the lensing cluster field SMACS0723. The recent JWST Early Release Observations of this poorly known region of the sky have revealed numerous point-like source... Read More about Star formation at the smallest scales: a JWST study of the clump populations in SMACS0723.

Revealing galaxy candidates out to z ∼ 16 with JWST observations of the lensing cluster SMACS0723 (2022)
Journal Article
Atek, H., Shuntov, M., Furtak, L. J., Richard, J., Kneib, J.-P., Mahler, G., Zitrin, A., McCracken, H., Charlot, S., Chevallard, J., & Chemerynska, I. (2023). Revealing galaxy candidates out to z ∼ 16 with JWST observations of the lensing cluster SMACS0723. Monthly Notices of the Royal Astronomical Society, 519(1), 1201 - 1220. https://doi.org/10.1093/mnras/stac3144

One of the main goals of the JWST is to study the first galaxies in the Universe. We present a systematic photometric analysis of very distant galaxies in the first JWST deep field towards the massive lensing cluster SMACS0723. As a result, we report... Read More about Revealing galaxy candidates out to z ∼ 16 with JWST observations of the lensing cluster SMACS0723.

Gravitational lensing effects of supermassive black holes in cluster environments (2022)
Journal Article
Mahler, G., Natarajan, P., Jauzac, M., & Richard, J. (2023). Gravitational lensing effects of supermassive black holes in cluster environments. Monthly Notices of the Royal Astronomical Society, 518(1), 54-65. https://doi.org/10.1093/mnras/stac3098

This study explores the gravitational lensing effects of supermassive black holes (SMBHs) in galaxy clusters. While the presence of central SMBHs in galaxies is firmly established, recent work from high-resolution simulations predict the existence of... Read More about Gravitational lensing effects of supermassive black holes in cluster environments.

Synthesizing Stellar Populations in South Pole Telescope Galaxy Clusters. I. Ages of Quiescent Member Galaxies at 0.3 < z < 1.4 (2022)
Journal Article
Khullar, G., Bayliss, M. B., Gladders, M. D., Kim, K. J., Calzadilla, M. S., Strazzullo, V., Bleem, L. E., Mahler, G., McDonald, M., Floyd, B., Reichardt, C. L., Ruppin, F., Saro, A., Sharon, K., Somboonpanyakul, T., Stalder, B., & Stark, A. A. (2022). Synthesizing Stellar Populations in South Pole Telescope Galaxy Clusters. I. Ages of Quiescent Member Galaxies at 0.3 < z < 1.4. Astrophysical Journal, 934(2), https://doi.org/10.3847/1538-4357/ac7c0c

Using stellar population synthesis models to infer star formation histories (SFHs), we analyze photometry and spectroscopy of a large sample of quiescent galaxies that are members of Sunyaev–Zel'dovich (SZ)-selected galaxy clusters across a wide rang... Read More about Synthesizing Stellar Populations in South Pole Telescope Galaxy Clusters. I. Ages of Quiescent Member Galaxies at 0.3 < z < 1.4.

Pilot-WINGS: An extended MUSE view of the structure of Abell 370 (2022)
Journal Article
Lagattuta, D. J., Richard, J., Bauer, F. E., Cerny, C., Claeyssens, A., Guaita, L., Jauzac, M., Jeanneau, A., Koekemoer, A. M., Mahler, G., Prieto Lyon, G., Acebron, A., Meneghetti, M., Niemiec, A., Zitrin, A., Bianconi, M., Connor, T., Cen, R., Edge, A., Faisst, A. L., …Weaver, J. R. (2022). Pilot-WINGS: An extended MUSE view of the structure of Abell 370. Monthly Notices of the Royal Astronomical Society, 514(1), 497-517. https://doi.org/10.1093/mnras/stac418

We investigate the strong-lensing cluster Abell 370 (A370) using a wide Integral Field Unit (IFU) spectroscopic mosaic from the Multi-Unit Spectroscopic Explorer (MUSE). IFU spectroscopy provides significant insight into the structure and mass conten... Read More about Pilot-WINGS: An extended MUSE view of the structure of Abell 370.

Core Mass Estimates in Strong Lensing Galaxy Clusters: A Comparison between Masses Obtained from Detailed Lens Models, Single-halo Lens Models, and Einstein Radii (2021)
Journal Article
Remolina González, J., Sharon, K., Mahler, G., Fox, C., Garcia Diaz, C., Napier, K., Bleem, L., Gladders, M., Li, N., & Niemiec, A. (2021). Core Mass Estimates in Strong Lensing Galaxy Clusters: A Comparison between Masses Obtained from Detailed Lens Models, Single-halo Lens Models, and Einstein Radii. Astrophysical Journal, 920(2), Article 98. https://doi.org/10.3847/1538-4357/ac16d8

The core mass of galaxy clusters is both an important anchor of the radial mass distribution profile and a probe of structure formation. With thousands of strong lensing galaxy clusters being discovered by current and upcoming surveys, timely, effici... Read More about Core Mass Estimates in Strong Lensing Galaxy Clusters: A Comparison between Masses Obtained from Detailed Lens Models, Single-halo Lens Models, and Einstein Radii.

Recovery and analysis of rest-frame UV emission lines in 2052 galaxies observed with MUSE at 1.5 < z < 6.4 (2021)
Journal Article
Schmidt, K., Kerutt, J., Wisotzki, L., Urrutia, T., Feltre, A., Maseda, M., Nanayakkara, T., Bacon, R., Boogaard, L., Conseil, S., Contini, T., Herenz, E., Kollatschny, W., Krumpe, M., Leclercq, F., Mahler, G., Matthee, J., Mauerhofer, V., Richard, J., & Schaye, J. (2021). Recovery and analysis of rest-frame UV emission lines in 2052 galaxies observed with MUSE at 1.5 < z < 6.4. Astronomy & Astrophysics, 654, Article A80. https://doi.org/10.1051/0004-6361/202140876

Rest-frame ultraviolet (UV) emission lines probe electron densities, gas-phase abundances, metallicities, and ionization parameters of the emitting star-forming galaxies and their environments. The strongest main UV emission line, Lyα, has been instr... Read More about Recovery and analysis of rest-frame UV emission lines in 2052 galaxies observed with MUSE at 1.5 < z < 6.4.

Core Mass Estimates in Strong Lensing Galaxy Clusters Using a Single-halo Lens Model (2021)
Journal Article
González, J. R., Sharon, K., Li, N., Mahler, G., Bleem, L., Gladders, M., & Niemiec, A. (2021). Core Mass Estimates in Strong Lensing Galaxy Clusters Using a Single-halo Lens Model. Astrophysical Journal, 910(2), Article 146. https://doi.org/10.3847/1538-4357/abe62a

The core mass of galaxy clusters is an important probe of structure formation. Here we evaluate the use of a singlehalo model (SHM) as an efficient method to estimate the strong lensing cluster core mass, testing it with ray-traced images from the Ou... Read More about Core Mass Estimates in Strong Lensing Galaxy Clusters Using a Single-halo Lens Model.