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Auteurs principaux: Chang, Yu-Ling, Lan, Ting-Wen, Prochaska, J. Xavier, Siudek, Malgorzata, Aguilar, J., Ahlen, S., Anand, A., Bianchi, D., Brooks, D., Castander, F. J., Claybaugh, T., de la Macorra, A., Doel, P., Ferraro, S., Font-Ribera, A., Forero-Romero, J. E., Gaztanaga, E., Gontcho, S. Gontcho A, Gutierrez, G., Guy, J., Honscheid, K., Joyce, R., Juneau, S., Kremin, A., Lahav, O., Lamman, C., Landriau, M., Guillou, L. Le, Levi, M. E., Manera, M., Meisner, A., Miquel, R., Nadathur, S., Newman, J. A., Percival, W. J., Poppett, C., Prada, F., Perez-Rafols, I., Rossi, G., Sanchez, E., Schlegel, D., Schubnell, M., Sprayberry, D., Tarle, G., Weaver, B. A., Zhou, R., Zou, H.
Format: Preprint
Publié: 2025
Sujets:
Astrophysics of Galaxies
Accès en ligne:https://arxiv.org/abs/2512.03845
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_version_ 1866911301205229568
author Chang, Yu-Ling
Lan, Ting-Wen
Prochaska, J. Xavier
Siudek, Malgorzata
Aguilar, J.
Ahlen, S.
Anand, A.
Bianchi, D.
Brooks, D.
Castander, F. J.
Claybaugh, T.
de la Macorra, A.
Doel, P.
Ferraro, S.
Font-Ribera, A.
Forero-Romero, J. E.
Gaztanaga, E.
Gontcho, S. Gontcho A
Gutierrez, G.
Guy, J.
Honscheid, K.
Joyce, R.
Juneau, S.
Kremin, A.
Lahav, O.
Lamman, C.
Landriau, M.
Guillou, L. Le
Levi, M. E.
Manera, M.
Meisner, A.
Miquel, R.
Nadathur, S.
Newman, J. A.
Percival, W. J.
Poppett, C.
Prada, F.
Perez-Rafols, I.
Rossi, G.
Sanchez, E.
Schlegel, D.
Schubnell, M.
Sprayberry, D.
Tarle, G.
Weaver, B. A.
Zhou, R.
Zou, H.
author_facet Chang, Yu-Ling
Lan, Ting-Wen
Prochaska, J. Xavier
Siudek, Malgorzata
Aguilar, J.
Ahlen, S.
Anand, A.
Bianchi, D.
Brooks, D.
Castander, F. J.
Claybaugh, T.
de la Macorra, A.
Doel, P.
Ferraro, S.
Font-Ribera, A.
Forero-Romero, J. E.
Gaztanaga, E.
Gontcho, S. Gontcho A
Gutierrez, G.
Guy, J.
Honscheid, K.
Joyce, R.
Juneau, S.
Kremin, A.
Lahav, O.
Lamman, C.
Landriau, M.
Guillou, L. Le
Levi, M. E.
Manera, M.
Meisner, A.
Miquel, R.
Nadathur, S.
Newman, J. A.
Percival, W. J.
Poppett, C.
Prada, F.
Perez-Rafols, I.
Rossi, G.
Sanchez, E.
Schlegel, D.
Schubnell, M.
Sprayberry, D.
Tarle, G.
Weaver, B. A.
Zhou, R.
Zou, H.
contents We investigate the properties of the cool circumgalactic medium (CGM) of massive galaxies and their cosmic evolution. By using the year 1 dataset of luminous red galaxies (LRGs) and QSOs from the Dark Energy Spectroscopic Instrument survey, we construct a sample of approximately 600,000 galaxy-quasar pairs and measure the radial distribution and kinematics of the cool gas traced by Mg II absorption lines as a function of galaxy properties from redshift 0.4 to redshift 1.2. Our results show that the covering fraction of the cool gas around LRGs increases with redshift, following a trend similar to the global evolution of galaxy star formation rate. At small radii (< 0.3rvir), the covering fraction anti-correlates with stellar mass, suggesting that mass-dependent processes suppress the cool gas content in the inner region. In addition, we measure the gas dispersion by modeling the velocity distribution of absorbers with a narrow and a broad components -- sigma_n ~ 160 and sigma_b ~ 380 km/s -- and quantify their relative contributions. The results show that the broad component becomes more prominent in the outer region, and its relative importance in the central region grows with increasing stellar mass. Finally, we discuss possible origins of the cool gas around massive galaxies, including the contribution of satellite galaxies and the precipitation scenario.
format Preprint
id arxiv_https___arxiv_org_abs_2512_03845
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Tracing the Cosmic Evolution of the Cool Circumgalactic Medium of Luminous Red Galaxies with DESI Year 1 Data
Chang, Yu-Ling
Lan, Ting-Wen
Prochaska, J. Xavier
Siudek, Malgorzata
Aguilar, J.
Ahlen, S.
Anand, A.
Bianchi, D.
Brooks, D.
Castander, F. J.
Claybaugh, T.
de la Macorra, A.
Doel, P.
Ferraro, S.
Font-Ribera, A.
Forero-Romero, J. E.
Gaztanaga, E.
Gontcho, S. Gontcho A
Gutierrez, G.
Guy, J.
Honscheid, K.
Joyce, R.
Juneau, S.
Kremin, A.
Lahav, O.
Lamman, C.
Landriau, M.
Guillou, L. Le
Levi, M. E.
Manera, M.
Meisner, A.
Miquel, R.
Nadathur, S.
Newman, J. A.
Percival, W. J.
Poppett, C.
Prada, F.
Perez-Rafols, I.
Rossi, G.
Sanchez, E.
Schlegel, D.
Schubnell, M.
Sprayberry, D.
Tarle, G.
Weaver, B. A.
Zhou, R.
Zou, H.
Astrophysics of Galaxies
We investigate the properties of the cool circumgalactic medium (CGM) of massive galaxies and their cosmic evolution. By using the year 1 dataset of luminous red galaxies (LRGs) and QSOs from the Dark Energy Spectroscopic Instrument survey, we construct a sample of approximately 600,000 galaxy-quasar pairs and measure the radial distribution and kinematics of the cool gas traced by Mg II absorption lines as a function of galaxy properties from redshift 0.4 to redshift 1.2. Our results show that the covering fraction of the cool gas around LRGs increases with redshift, following a trend similar to the global evolution of galaxy star formation rate. At small radii (< 0.3rvir), the covering fraction anti-correlates with stellar mass, suggesting that mass-dependent processes suppress the cool gas content in the inner region. In addition, we measure the gas dispersion by modeling the velocity distribution of absorbers with a narrow and a broad components -- sigma_n ~ 160 and sigma_b ~ 380 km/s -- and quantify their relative contributions. The results show that the broad component becomes more prominent in the outer region, and its relative importance in the central region grows with increasing stellar mass. Finally, we discuss possible origins of the cool gas around massive galaxies, including the contribution of satellite galaxies and the precipitation scenario.
title Tracing the Cosmic Evolution of the Cool Circumgalactic Medium of Luminous Red Galaxies with DESI Year 1 Data
topic Astrophysics of Galaxies
url https://arxiv.org/abs/2512.03845

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