All Outputs (259)

Luminosity and Stellar Mass Functions of Faint Photometric Satellites around Spectroscopic Central Galaxies from DESI Year-1 Bright Galaxy Survey (2025)
Journal Article
Wang, W., Yang, X., Jing, Y., Ross, A. J., Siudek, M., Moustakas, J., Moore, S. G., Cole, S., Frenk, C., Yu, J., Koposov, S. E., Han, J., Tan, Z., Xu, K., Gu, Y., Wang, Y., Gnedin, O. Y., Aguilar, J. N., Ahlen, S., Bianchi, D., …Zou, H. (2025). Luminosity and Stellar Mass Functions of Faint Photometric Satellites around Spectroscopic Central Galaxies from DESI Year-1 Bright Galaxy Survey. The Astrophysical Journal, 986(2), https://doi.org/10.3847/1538-4357/add5df

We measure the luminosity functions (LFs) and stellar mass functions (SMFs) of photometric satellite galaxies around spectroscopically identified isolated central galaxies (ICGs). The photometric satellites are from the DESI Legacy Imaging Surveys (D... Read More about Luminosity and Stellar Mass Functions of Faint Photometric Satellites around Spectroscopic Central Galaxies from DESI Year-1 Bright Galaxy Survey.

DESI Mg ii Absorbers: Extinction Characteristics and Quasar Redshift Accuracy (2025)
Journal Article
Napolitano, L., Myers, A. D., Fawcett, V. A., Aguilar, J., Ahlen, S., Bianchi, D., Brooks, D., Claybaugh, T., Cole, S., de la Macorra, A., Dey, B., Font-Ribera, A., Forero-Romero, J. E., Gaztañaga, E., Gontcho A Gontcho, S., Gutierrez, G., Honscheid, K., Juneau, S., Lambert, A., Landriau, M., …Zou, H. (2025). DESI Mg ii Absorbers: Extinction Characteristics and Quasar Redshift Accuracy. Astronomical Journal, 170(1), Article 16. https://doi.org/10.3847/1538-3881/adc389

In this paper, we study how absorption-line systems affect the spectra and redshifts of quasi-stellar objects (QSOs), using catalogs of Mg ii absorbers from the early data release and first data release of the Dark Energy Spectroscopic Instrument. We... Read More about DESI Mg ii Absorbers: Extinction Characteristics and Quasar Redshift Accuracy.

Lopsidedness in early-type galaxies: the role of the m = 1 multipole in isophote fitting and strong lens modelling (2025)
Journal Article
Amvrosiadis, A., Nightingale, J. W., He, Q., Robertson, A., Lange, S., Frenk, C. S., Cole, S., Massey, R., & Poci, A. (2025). Lopsidedness in early-type galaxies: the role of the m = 1 multipole in isophote fitting and strong lens modelling. Monthly Notices of the Royal Astronomical Society, 540(4), 3281-3288. https://doi.org/10.1093/mnras/staf857

The surface brightness distribution of massive early-type galaxies (ETGs) often deviates from a perfectly elliptical shape. To capture these deviations in their isophotes during an ellipse fitting analysis, Fourier modes of order are often used. In s... Read More about Lopsidedness in early-type galaxies: the role of the m = 1 multipole in isophote fitting and strong lens modelling.

Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples (2025)
Journal Article
Novell-Masot, S., Gil-Marín, H., Verde, L., Aguilar, J., Ahlen, S., Bailey, S., BenZvi, S., Bianchi, D., Brooks, D., Buckley-Geer, E., Carnero Rosell, A., Chaussidon, E., Claybaugh, T., Cole, S., Cuceu, A., Dawson, K., de la Macorra, A., Demina, R., Dey, A., Dey, B., …Zou, H. (2025). Full-Shape analysis of the power spectrum and bispectrum of DESI DR1 LRG and QSO samples. Journal of Cosmology and Astroparticle Physics, 2025(06), 005. https://doi.org/10.1088/1475-7516/2025/06/005

PAC in DESI. I. Galaxy stellar mass function into the 106 M⊙ frontier (2025)
Journal Article
Xu, K., Jing, Y. P., Cole, S., Frenk, C. S., Bose, S., Elbers, W., Wang, W., Wang, Y., Moore, S., Aguilar, J., Ahlen, S., Bianchi, D., Brooks, D., Claybaugh, T., de la Macorra, A., Dey, A., Forero-Romero, J. E., Gaztañaga, E., Gontcho, S. G. A., Gutierrez, G., …Zou, H. (2025). PAC in DESI. I. Galaxy stellar mass function into the 106 M⊙ frontier. Monthly Notices of the Royal Astronomical Society, 540(2), 1635-1667. https://doi.org/10.1093/mnras/staf782

The unabridged satellite luminosity function of Milky Way-like galaxies in ΛCDM: the contribution of ‘orphan’ satellites (2025)
Journal Article
Santos-Santos, I. M. E., Frenk, C. S., Navarro, J. F., Cole, S., & Helly, J. (2025). The unabridged satellite luminosity function of Milky Way-like galaxies in ΛCDM: the contribution of ‘orphan’ satellites. Monthly Notices of the Royal Astronomical Society, 540(1), 1107-1123. https://doi.org/10.1093/mnras/staf749

We study the abundance, radial distribution, and orbits of luminous satellites in simulations of Milky Way-mass dark haloes in the cold dark matter (ΛCDM) cosmology. We follow the evolution of a halo from the Aquarius project and the formation of its... Read More about The unabridged satellite luminosity function of Milky Way-like galaxies in ΛCDM: the contribution of ‘orphan’ satellites.

Analytical and EZmock covariance validation for the DESI 2024 results (2025)
Journal Article
Forero-Sánchez, D., Rashkovetskyi, M., Alves, O., de Mattia, A., Padmanabhan, N., Seo, H., Nadathur, S., Ross, A., Gil-Marín, H., Zarrouk, P., Yu, J., Ding, Z., Andrade, U., Chen, X., Garcia-Quintero, C., Mena-Fernández, J., Ahlen, S., Bianchi, D., Brooks, D., Burtin, E., …Zou, H. (2025). Analytical and EZmock covariance validation for the DESI 2024 results. Journal of Cosmology and Astroparticle Physics, 2025(04), Article 055. https://doi.org/10.1088/1475-7516/2025/04/055

The estimation of uncertainties in cosmological parameters is an important challenge in Large-Scale-Structure (LSS) analyses. For standard analyses such as Baryon Acoustic Oscillations (BAO) and Full-Shape two approaches are usually considered. First... Read More about Analytical and EZmock covariance validation for the DESI 2024 results.

Galaxy mass modelling from multiwavelength JWST strong lens analysis: dark matter substructure, angular mass complexity, or both? (2025)
Journal Article
Lange, S. C., Amvrosiadis, A., Nightingale, J. W., He, Q., Frenk, C. S., Robertson, A., Cole, S., Massey, R., Cao, X., Li, R., & Wang, K. (2025). Galaxy mass modelling from multiwavelength JWST strong lens analysis: dark matter substructure, angular mass complexity, or both?. Monthly Notices of the Royal Astronomical Society, 539(2), 704-726. https://doi.org/10.1093/mnras/staf491

We analyse two galaxy-scale strong gravitational lenses, SPT0418-47 and SPT2147-50, using JWST NIRCam imaging across multiple filters. To account for angular complexity in the lens mass distribution, we introduce multipole perturbations with orders m... Read More about Galaxy mass modelling from multiwavelength JWST strong lens analysis: dark matter substructure, angular mass complexity, or both?.

DESIVAST: Catalogs of Low-redshift Voids Using Data from the DESI Data Release 1 Bright Galaxy Survey (2025)
Journal Article
Rincon, H., Benzvi, S., Douglass, K., Veyrat, D., Aguilar, J. N., Ahlen, S., Bianchi, D., Brooks, D., Claybaugh, T., Cole, S., de la Macorra, A., Doel, P., Font-Ribera, A., Forero-Romero, J. E., Gaztañaga, E., Gontcho A Gontcho, S., Gutierrez, G., Honscheid, K., Howlett, C., Juneau, S., …Zou, H. (2025). DESIVAST: Catalogs of Low-redshift Voids Using Data from the DESI Data Release 1 Bright Galaxy Survey. Astrophysical Journal, 982(1), Article 38. https://doi.org/10.3847/1538-4357/adb559

We present three separate void catalogs created using a volume-limited sample of the DESI Data Release 1 Bright Galaxy Survey. We use the algorithms VoidFinder and V² to construct void catalogs out to a redshift of z = 0.24. Excluding void... Read More about DESIVAST: Catalogs of Low-redshift Voids Using Data from the DESI Data Release 1 Bright Galaxy Survey.

Unraveling emission line galaxy conformity at z ∼1 with DESI early data (2025)
Journal Article
Yuan, S., Wechsler, R. H., Wang, Y., De Los Reyes, M. A., Myles, J., Rocher, A., Hadzhiyska, B., Aguilar, J. N., Ahlen, S., Brooks, D., Claybaugh, T., Cole, S., De La Macorra, A., Forero-Romero, J. E., Gontcho, S. G. A., Guy, J., Honscheid, K., Kisner, T., Levi, M., Manera, M., …Zhou, Z. (2025). Unraveling emission line galaxy conformity at z ∼1 with DESI early data. Monthly Notices of the Royal Astronomical Society, 538(2), 1216-1240. https://doi.org/10.1093/mnras/staf368

Emission line galaxies (ELGs) are now the preeminent tracers of large-scale structure at 0.8$]]> due to their high density and strong emission lines, which enable accurate redshift measurements. However, relatively little is known about ELG evolution... Read More about Unraveling emission line galaxy conformity at z ∼1 with DESI early data.

Neural network-based model of galaxy power spectrum: fast full-shape galaxy power spectrum analysis (2025)
Journal Article
Trusov, S., Zarrouk, P., & Cole, S. (2025). Neural network-based model of galaxy power spectrum: fast full-shape galaxy power spectrum analysis. Monthly Notices of the Royal Astronomical Society, 538(3), 1789-1799. https://doi.org/10.1093/mnras/staf285

We present a neural network-based emulator for the galaxy redshift-space power spectrum that enables several orders of magnitude acceleration in the galaxy clustering parameter inference, while preserving 3σ accuracy better than 0.5 per cent up to km... Read More about Neural network-based model of galaxy power spectrum: fast full-shape galaxy power spectrum analysis.

ForestFlow: predicting the Lyman-α forest clustering from linear to nonlinear scales (2025)
Journal Article
Chaves-Montero, J., Cabayol-Garcia, L., Lokken, M., Font-Ribera, A., Aguilar, J., Ahlen, S., Bianchi, D., Brooks, D., Claybaugh, T., Cole, S., de la Macorra, A., Ferraro, S., Forero-Romero, J. E., Gaztañaga, E., Gontcho A Gontcho, S., Gutierrez, G., Honscheid, K., Kehoe, R., Kirkby, D., Kremin, A., …Weaver, B. A. (2025). ForestFlow: predicting the Lyman-α forest clustering from linear to nonlinear scales. Astronomy & Astrophysics, 694, Article A187. https://doi.org/10.1051/0004-6361/202452039

On large scales, the Lyman-α forest provides insights into the expansion history of the Universe, while on small scales, it imposes strict constraints on the growth history, the nature of dark matter, and the sum of neutrino masses. This work introdu... Read More about ForestFlow: predicting the Lyman-α forest clustering from linear to nonlinear scales.

The onset of bar formation in a massive galaxy at z ∼ 3.8 (2025)
Journal Article
Amvrosiadis, A., Lange, S., Nightingale, J. W., He, Q., Frenk, C. S., Oman, K. A., Smail, I., Swinbank, A. M., Fragkoudi, F., Gadotti, D. A., Cole, S., Borsato, E., Robertson, A., Massey, R., Cao, X., & Li, R. (2025). The onset of bar formation in a massive galaxy at z ∼ 3.8. Monthly Notices of the Royal Astronomical Society, 537(2), 1163-1181. https://doi.org/10.1093/mnras/staf048

We examine the morphological and kinematical properties of SPT-2147, a strongly lensed, massive, dusty, star-forming galaxy at z = 3.762. Combining data from JWST, Hubble Space Telescope, and ALMA, we study the galaxy’s stellar emission, dust continu... Read More about The onset of bar formation in a massive galaxy at z ∼ 3.8.

A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys (2025)
Journal Article
Maus, M., Lai, Y., Noriega, H., Ramirez-Solano, S., Aviles, A., Chen, S., Fromenteau, S., Gil-Marín, H., Howlett, C., Vargas-Magaña, M., White, M., Zarrouk, P., Aguilar, J., Ahlen, S., Alves, O., Brieden, S., Brooks, D., Burtin, E., Claybaugh, T., Cole, S., …Zou, H. (2025). A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys. Journal of Cosmology and Astroparticle Physics, 2025(1), https://doi.org/10.1088/1475-7516/2025/01/134

In preparation for the next generation of galaxy redshift surveys, and in particular the year-one data release from the Dark Energy Spectroscopic Instrument (DESI), we investigate the consistency of a variety of effective field theory models that des... Read More about A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys.

Blinding scheme for the scale-dependence bias signature of local primordial non-Gaussianity for DESI 2024 (2025)
Journal Article
Chaussidon, E., de Mattia, A., Yèche, C., Aguilar, J., Ahlen, S., Brooks, D., Claybaugh, T., Cole, S., de la Macorra, A., Doel, P., Fanning, K., Gaztañaga, E., Gontcho, S. G. A., Howlett, C., Kisner, T., Lambert, A., Le Guillou, L., Manera, M., Meisner, A., Miquel, R., …Zou, H. (2025). Blinding scheme for the scale-dependence bias signature of local primordial non-Gaussianity for DESI 2024. Journal of Cosmology and Astroparticle Physics, 2025(1), Article 135. https://doi.org/10.1088/1475-7516/2025/01/135

The next generation of spectroscopic surveys is expected to achieve an unprecedented level of accuracy in the measurement of cosmological parameters. To avoid confirmation bias and thereby improve the reliability of these results, blinding procedures... Read More about Blinding scheme for the scale-dependence bias signature of local primordial non-Gaussianity for DESI 2024.

DESI Emission-line Galaxies: Unveiling the Diversity of [O ii] Profiles and Its Links to Star Formation and Morphology (2024)
Journal Article
Lan, T.-W., Prochaska, J. X., Moustakas, J., Siudek, M., Aguilar, J., Ahlen, S., Bianchi, D., Brooks, D., Claybaugh, T., Cole, S., Dawson, K., de la Macorra, A., Doel, P., Forero-Romero, J. E., Gaztañaga, E., Gontcho A Gontcho, S., Gutierrez, G., Guy, J., Honscheid, K., Kehoe, R., …Zou, H. (2024). DESI Emission-line Galaxies: Unveiling the Diversity of [O ii] Profiles and Its Links to Star Formation and Morphology. Astrophysical Journal, 977(2), Article 225. https://doi.org/10.3847/1538-4357/ad8f33

We study the [O ii] profiles of emission-line galaxies (ELGs) from the Early Data Release of the Dark Energy Spectroscopic Instrument (DESI). To this end, we decompose and classify the shape of [O ii] profiles with the first two eigenspectra derived... Read More about DESI Emission-line Galaxies: Unveiling the Diversity of [O ii] Profiles and Its Links to Star Formation and Morphology.

A comparison of pre-existing ΛCDM predictions with the abundance of JWST galaxies at high redshift (2024)
Journal Article
Lu, S., Frenk, C. S., Bose, S., Lacey, C. G., Cole, S., Baugh, C. M., & Helly, J. C. (2024). A comparison of pre-existing ΛCDM predictions with the abundance of JWST galaxies at high redshift. Monthly Notices of the Royal Astronomical Society, 536(1), 1018-1034. https://doi.org/10.1093/mnras/stae2646

Value-added catalog of physical properties for more than 1.3 million galaxies from the DESI survey (2024)
Journal Article
Siudek, M., Pucha, R., Mezcua, M., Juneau, S., Aguilar, J., Ahlen, S., Brooks, D., Circosta, C., Claybaugh, T., Cole, S., Dawson, K., de la Macorra, A., Dey, A., Dey, B., Doel, P., Font-Ribera, A., Forero-Romero, J. E., Gaztañaga, E., Gontcho A Gontcho, S., Gutierrez, G., …Zou, H. (2024). Value-added catalog of physical properties for more than 1.3 million galaxies from the DESI survey. Astronomy & Astrophysics, 691, Article A308. https://doi.org/10.1051/0004-6361/202451761

Aims. We present an extensive catalog of the physical properties of more than a million galaxies investigated with the Dark Energy Spectroscopic Instrument (DESI), one of the largest spectroscopic surveys to date. Spanning a full range of target type... Read More about Value-added catalog of physical properties for more than 1.3 million galaxies from the DESI survey.

Overview of the Fiber System for the Dark Energy Spectroscopic Instrument (2024)
Journal Article
Poppett, C., Tyas, L., Aguilar, J., Bebek, C., Bramall, D., Claybaugh, T., Edelstein, J., Fagrelius, P., Heetderks, H., Jelinsky, P., Jelinsky, S., Lafever, R., Lambert, A., Lampton, M., Levi, M. E., Martini, P., Rockosi, C., Schmoll, J., Sharples, R. M., Sirk, M., …Zhou, R. (2024). Overview of the Fiber System for the Dark Energy Spectroscopic Instrument. Astronomical Journal, 168(6), Article 245. https://doi.org/10.3847/1538-3881/ad76a4

The Dark Energy Spectroscopic Instrument (DESI) is a revolutionary instrument designed for precise measurements of cosmic distances and the investigation of dark energy. DESI utilizes 5000 optical fibers to simultaneously measure the spectra of dista... Read More about Overview of the Fiber System for the Dark Energy Spectroscopic Instrument.

Inferring the Mass Content of Galaxy Clusters with Satellite Kinematics and Jeans Anisotropic Modeling (2024)
Journal Article
Shi, R., Wang, W., Li, Z., Zhu, L., Smith, A., Cole, S., Gao, H., Chen, X., Li, Q., & Han, J. (2024). Inferring the Mass Content of Galaxy Clusters with Satellite Kinematics and Jeans Anisotropic Modeling. The Astrophysical Journal, 973(2), Article 82. https://doi.org/10.3847/1538-4357/ad64cf

Satellite galaxies can be used to indicate the dynamic mass of galaxy groups and clusters. In this study, we apply the axisymmetric Jeans Anisotropic Multi-Gaussian Expansion (JAM) modeling to satellite galaxies in 28 galaxy clusters selected from th... Read More about Inferring the Mass Content of Galaxy Clusters with Satellite Kinematics and Jeans Anisotropic Modeling.