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JWST/NIRCam Probes Young Star Clusters in the Reionization Era Sunrise Arc (2023)
Journal Article
Vanzella, E., Claeyssens, A., Welch, B., Adamo, A., Coe, D., Diego, J. M., Mahler, G., Khullar, G., Kokorev, V., Oguri, M., Ravindranath, S., Furtak, L. J., Hsiao, T. Y.-Y., Abdurro'uf, Mandelker, N., Brammer, G., Bradley, L. D., Bradač, M., Conselice, C. J., Dayal, P., …Norman, C. (2023). JWST/NIRCam Probes Young Star Clusters in the Reionization Era Sunrise Arc. Astrophysical Journal, 945(1), Article 53. https://doi.org/10.3847/1538-4357/acb59a

Star cluster formation in the early universe and its contribution to reionization remains largely unconstrained to date. Here we present JWST/NIRCam imaging of the most highly magnified galaxy known at z ∼ 6, the Sunrise arc. We identify six young ma... Read More about JWST/NIRCam Probes Young Star Clusters in the Reionization Era Sunrise Arc.

Hubble Constant Measurement from Three Large-separation Quasars Strongly Lensed by Galaxy Clusters (2023)
Journal Article
Napier, K., Sharon, K., Dahle, H., Bayliss, M., Gladders, M. D., Mahler, G., …Florian, M. (2023). Hubble Constant Measurement from Three Large-separation Quasars Strongly Lensed by Galaxy Clusters. Astrophysical Journal, 959(2), Article 134. https://doi.org/10.3847/1538-4357/ad045a

Tension between cosmic microwave background–based and distance ladder–based determinations of the Hubble constant H 0 motivates the pursuit of independent methods that are not subject to the same systematic effects. A promising alternative, proposed... Read More about Hubble Constant Measurement from Three Large-separation Quasars Strongly Lensed by Galaxy Clusters.

Exploring the correlation between dark matter, intracluster light, and globular cluster distribution in SMACS0723 (2023)
Journal Article
Diego, J. M., Pascale, M., Frye, B., Zitrin, A., Broadhurst, T., Mahler, G., …Montes, M. (2023). Exploring the correlation between dark matter, intracluster light, and globular cluster distribution in SMACS0723. Astronomy & Astrophysics, 679, Article A159. https://doi.org/10.1051/0004-6361/202345868

We present a free-form model of SMACS0723, the first cluster observed with JWST. This model does not make any strong assumptions on the distribution of mass (mostly made up of dark matter) in the cluster and we use it to study the possible correlatio... Read More about Exploring the correlation between dark matter, intracluster light, and globular cluster distribution in SMACS0723.

JWST's TEMPLATES for Star Formation: The First Resolved Gas-phase Metallicity Maps of Dust-obscured Star-forming Galaxies at z ∼ 4 (2023)
Journal Article
Birkin, J. E., Hutchison, T. A., Welch, B., Spilker, J. S., Aravena, M., Bayliss, M. B., Cathey, J., Chapman, S. C., Gonzalez, A. H., Gururajan, G., Hayward, C. C., Khullar, G., Kim, K. J., Mahler, G., Malkan, M. A., Narayanan, D., Olivier, G. M., Phadke, K. A., Reuter, C., Rigby, J. R., …Weiss, A. (2023). JWST's TEMPLATES for Star Formation: The First Resolved Gas-phase Metallicity Maps of Dust-obscured Star-forming Galaxies at z ∼ 4. Astrophysical Journal, 958(1), 64. https://doi.org/10.3847/1538-4357/acf712

We present the first spatially resolved maps of gas-phase metallicity for two dust-obscured star-forming galaxies at z ∼ 4, from the JWST TEMPLATES Early Release Science program, derived from NIRSpec integral field unit spectroscopy of the Hα and [N... Read More about JWST's TEMPLATES for Star Formation: The First Resolved Gas-phase Metallicity Maps of Dust-obscured Star-forming Galaxies at z ∼ 4.

A new step forward in realistic cluster lens mass modelling: analysis of Hubble Frontier Field Cluster Abell S1063 from joint lensing, X-ray, and galaxy kinematics data (2023)
Journal Article
Beauchesne, B., Clément, B., Hibon, P., Limousin, M., Eckert, D., Kneib, J., …Sánchez, J. (2024). A new step forward in realistic cluster lens mass modelling: analysis of Hubble Frontier Field Cluster Abell S1063 from joint lensing, X-ray, and galaxy kinematics data. Monthly Notices of the Royal Astronomical Society, 527(2), 3246–3275. https://doi.org/10.1093/mnras/stad3308

We present a new method to simultaneously and self-consistently model the mass distribution of galaxy clusters that combines constraints from strong lensing features, X-ray emission, and galaxy kinematics measurements. We are able to successfully dec... Read More about A new step forward in realistic cluster lens mass modelling: analysis of Hubble Frontier Field Cluster Abell S1063 from joint lensing, X-ray, and galaxy kinematics data.

Probing the faint-end luminosity function of Lyman-alpha emitters at 3 < z < 7 behind 17 MUSE lensing clusters (2023)
Journal Article
Thai, T. T., Tuan-Anh, P., Pello, R., Goovaerts, I., Richard, J., Claeyssens, A., …Matthee, J. (2023). Probing the faint-end luminosity function of Lyman-alpha emitters at 3 < z < 7 behind 17 MUSE lensing clusters. Astronomy & Astrophysics, 678, Article A139. https://doi.org/10.1051/0004-6361/202346716

Context. This paper presents a study of the galaxy Lyman-alpha luminosity function (LF) using a large sample of 17 lensing clusters observed by the Multi Unit Spectroscopic Explorer (MUSE) at the ESO Very Large Telescope (VLT). The magnification resu... Read More about Probing the faint-end luminosity function of Lyman-alpha emitters at 3 < z < 7 behind 17 MUSE lensing clusters.

Reaching for the stars – JWST/NIRSpec spectroscopy of a lensed star candidate at z = 4.76 (2023)
Journal Article
Furtak, L. J., Meena, A. K., Zackrisson, E., Zitrin, A., Brammer, G. B., Coe, D., …Wilkins, S. M. (2024). Reaching for the stars – JWST/NIRSpec spectroscopy of a lensed star candidate at z = 4.76. Monthly Notices of the Royal Astronomical Society: Letters, 527(1), L7–L13. https://doi.org/10.1093/mnrasl/slad135

We present JWST/NIRSpec observations of a highly magnified star candidate at a photometric redshift of zphot ≃ 4.8, previously detected in JWST/NIRCam imaging of the strong lensing (SL) cluster MACS J0647+7015 (z = 0.591). The spectroscopic observati... Read More about Reaching for the stars – JWST/NIRSpec spectroscopy of a lensed star candidate at z = 4.76.

Small Region, Big Impact: Highly Anisotropic Lyman-continuum Escape from a Compact Starburst Region with Extreme Physical Properties (2023)
Journal Article
Kim, K. J., Bayliss, M. B., Rigby, J. R., Gladders, M. D., Chisholm, J., Sharon, K., …Roberson, J. (2023). Small Region, Big Impact: Highly Anisotropic Lyman-continuum Escape from a Compact Starburst Region with Extreme Physical Properties. Astrophysical Journal Letters, 955(1), Article L17. https://doi.org/10.3847/2041-8213/acf0c5

Extreme, young stellar populations are considered to be the primary contributor to cosmic reionization. How the Lyman continuum (LyC) escapes these galaxies remains highly elusive, and it is challenging to observe this process in actual LyC emitters... Read More about Small Region, Big Impact: Highly Anisotropic Lyman-continuum Escape from a Compact Starburst Region with Extreme Physical Properties.