Professor JAMES BOLTON's Outputs (10)

Galaxy Formation and Symbiotic Evolution with the Intergalactic Medium in the Age of ELT-ANDES (2024)
Journal Article
Valentina, D., Bolton, J. S., Lise, C., Cia, Annalisa, D., Erik, Z., Aron, K., Luca, I., Jiangtao, L., Roberto, M., Alessandro, M., Philipp, R., Andrea, S., Stefania, S., Irene, V., Chiara, F., Michele, F., Johan P. U., F., Pasquier, N., Polychronis, P., Celine, P., …Alessio, Z. (2024). Galaxy Formation and Symbiotic Evolution with the Intergalactic Medium in the Age of ELT-ANDES. Experimental Astronomy, 58(3), Article 21. https://doi.org/10.1007/s10686-024-09967-3

High-resolution absorption spectroscopy toward bright background sources has had a paramount role in understanding early galaxy formation, the evolution of the intergalactic medium and the reionisation of the Universe. However, these studies are now... Read More about Galaxy Formation and Symbiotic Evolution with the Intergalactic Medium in the Age of ELT-ANDES.

Deep learning the intergalactic medium using Lyman-alpha forest at 4 ≤ z ≤ 5 (2024)
Journal Article
Nasir, F., Gaikwad, P., Davies, F. B., Bolton, J. S., Puchwein, E., & Bosman, S. E. (2024). Deep learning the intergalactic medium using Lyman-alpha forest at 4 ≤ z ≤ 5. Monthly Notices of the Royal Astronomical Society, 534(2), 1299-1316. https://doi.org/10.1093/mnras/stae2153

Unveiling the thermal history of the intergalactic medium (IGM) at 4 ≤ z ≤ 5 holds the potential to reveal early onset He II reionization or lingering thermal fluctuations from H I reionization. We set out to reconstruct the IGM gas properties along... Read More about Deep learning the intergalactic medium using Lyman-alpha forest at 4 ≤ z ≤ 5.

Late-end reionization with aton-he: towards constraints from Ly α emitters observed with JWST (2024)
Journal Article
Shikhar, A., Martin G., H., Girish, K., Dominique, A., James S., B., & Laura C., K. (2024). Late-end reionization with aton-he: towards constraints from Ly α emitters observed with JWST. Monthly Notices of the Royal Astronomical Society, 533(3), 2843-2866. https://doi.org/10.1093/mnras/stae1945

We present a new suite of late-end reionization simulations performed with ATON-HE, a revised version of the GPU-based radiative transfer code ATON that includes helium. The simulations are able to reproduce the Ly α flux distribution of the E-XQR-30... Read More about Late-end reionization with aton-he: towards constraints from Ly α emitters observed with JWST.

Damping wing absorption associated with a giant Ly α trough at z < 6: direct evidence for late-ending reionization (2024)
Journal Article
Becker, G. D., Bolton, J. S., Zhu, Y., & Hashemi, S. (2024). Damping wing absorption associated with a giant Ly α trough at z < 6: direct evidence for late-ending reionization. Monthly Notices of the Royal Astronomical Society, 533(2), 1525–1540. https://doi.org/10.1093/mnras/stae1918

Multiple observations now suggest that the hydrogen reionization may have ended well below redshift six. While there has previously been no conclusive proof of extended neutral islands in the z < 6 intergalactic medium, it is possible that such islan... Read More about Damping wing absorption associated with a giant Ly α trough at z < 6: direct evidence for late-ending reionization.

The Lyman-limit photon mean free path at the end of late reionization in the Sherwood–Relics simulations (2024)
Journal Article
Feron, J., Conaboy, L., Bolton, J. S., Chapman, E., Haehnelt, M. G., Keating, L. C., Kulkarni, G., & Puchwein, E. (2024). The Lyman-limit photon mean free path at the end of late reionization in the Sherwood–Relics simulations. Monthly Notices of the Royal Astronomical Society, 532(2), 2401-2417. https://doi.org/10.1093/mnras/stae1636

Recent evidence supporting reionization ending at redshift z ≲ 6 includes the rapid redshift evolution of the mean free path, λmfp , for Lyman-limit photons through the intergalactic medium (IGM) at 5 < z < 6. Here, we investigate λmfp predicted by t... Read More about The Lyman-limit photon mean free path at the end of late reionization in the Sherwood–Relics simulations.

Damping wing-like features in the stacked Ly α forest: Potential neutral hydrogen islands at z < 6 (2024)
Journal Article
Zhu, Y., Becker, G. D., Bosman, S. E. I., Cain, C., Keating, L. C., Nasir, F., D’Odorico, V., Bañados, E., Bian, F., Bischetti, M., Bolton, J. S., Chen, H., D’Aloisio, A., Davies, F. B., Davies, R. L., Eilers, A.-C., Fan, X., Gaikwad, P., Greig, B., Haehnelt, M. G., …Yang, J. (2024). Damping wing-like features in the stacked Ly α forest: Potential neutral hydrogen islands at z < 6. Monthly Notices of the Royal Astronomical Society: Letters, 533(1), L49-L56. https://doi.org/10.1093/mnrasl/slae061

Recent quasar absorption line observations suggest that reionization may end as late as z ≈ 5.3. As a means to search for large neutral hydrogen islands at z < 6, we revisit long dark gaps in the Ly β forest in Very Large Telescope/X-Shooter and Keck... Read More about Damping wing-like features in the stacked Ly α forest: Potential neutral hydrogen islands at z < 6.

JWST observations of galaxy damping wings during reionization interpreted with cosmological simulations (2024)
Journal Article
Keating, L. C., Bolton, J. S., Cullen, F., Haehnelt, M. G., Puchwein, E., & Kulkarni, G. (2024). JWST observations of galaxy damping wings during reionization interpreted with cosmological simulations. Monthly Notices of the Royal Astronomical Society, 532(2), 1646–1658. https://doi.org/10.1093/mnras/stae1530

Spectra of the highest redshift galaxies taken with JWST are now allowing us to see into the heart of the reionization epoch. Many of these observed galaxies exhibit strong damping wing absorption redward of their Lyman-α emission. These observations... Read More about JWST observations of galaxy damping wings during reionization interpreted with cosmological simulations.

The origin of the characteristic shape and scatter of intergalactic damping wings during reionization (2024)
Journal Article
Keating, L. C., Puchwein, E., Bolton, J. S., Haehnelt, M. G., & Kulkarni, G. (2024). The origin of the characteristic shape and scatter of intergalactic damping wings during reionization. Monthly Notices of the Royal Astronomical Society: Letters, 531(1), L34-L39. https://doi.org/10.1093/mnrasl/slae022

Ly α damping wings in the spectra of bright objects at high redshift are a useful probe of the ionization state of the intergalactic medium during the reionization epoch. It has recently been noted that, despite the inhomogeneous nature of reionizati... Read More about The origin of the characteristic shape and scatter of intergalactic damping wings during reionization.

Particle initialization effects on Lyman- αforest statistics in cosmological SPH simulations (2024)
Journal Article
Khan, N. K., Kulkarni, G., Bolton, J. S., Haehnelt, M. G., Iršič, V., Puchwein, E., & Asthana, S. (2024). Particle initialization effects on Lyman- αforest statistics in cosmological SPH simulations. Monthly Notices of the Royal Astronomical Society, 530(4), 4920-4935. https://doi.org/10.1093/mnras/stae662

Confronting measurements of the Lyman- αforest with cosmological hydrodynamical simulations has produced stringent constraints on models of particle dark matter and the thermal and ionization state of the intergalactic medium. We investigate the robu... Read More about Particle initialization effects on Lyman- αforest statistics in cosmological SPH simulations.

Unveiling dark matter free streaming at the smallest scales with the high redshift Lyman-alpha forest (2024)
Journal Article
Iršič, V., Viel, M., Haehnelt, M. G., Bolton, J. S., Molaro, M., Puchwein, E., Boera, E., Becker, G. D., Gaikwad, P., Keating, L. C., & Kulkarni, G. (2024). Unveiling dark matter free streaming at the smallest scales with the high redshift Lyman-alpha forest. Physical Review D, 109(4), Article 043511. https://doi.org/10.1103/physrevd.109.043511

This study introduces novel constraints on the free streaming of thermal relic warm dark matter (WDM) from Lyman-α forest flux power spectra. Our analysis utilizes a high resolution, high redshift sample of quasar spectra observed using the HIRES and... Read More about Unveiling dark matter free streaming at the smallest scales with the high redshift Lyman-alpha forest.