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Exploring galaxy evolution time-scales in clusters: insights from the projected phase space (2024)
Journal Article
Sampaio, V. M., De Carvalho, R. R., Aragón-Salamanca, A., Merrifield, M. R., Ferreras, I., & Cornwell, D. J. (2024). Exploring galaxy evolution time-scales in clusters: insights from the projected phase space. Monthly Notices of the Royal Astronomical Society, 532(1), 982-994. https://doi.org/10.1093/mnras/stae1533

Galaxies infalling into clusters undergo both star-formation quenching and morphological transformation due to environmental effects. We investigate these processes and their timescales using a local sample of 20,191 cluster and 11,674 field galaxies... Read More about Exploring galaxy evolution time-scales in clusters: insights from the projected phase space.

The localization of galaxy groups in close proximity to galaxy clusters using cosmic web nodes (2023)
Journal Article
Cornwell, D. J., Kuchner, U., Gray, M. E., Aragón-Salamanca, A., Pearce, F. R., Cui, W., & Knebe, A. (2024). The localization of galaxy groups in close proximity to galaxy clusters using cosmic web nodes. Monthly Notices of the Royal Astronomical Society, 527(1), 23-34. https://doi.org/10.1093/mnras/stad3205

We investigate the efficacy of using the cosmic web nodes identified by the DisPerSE topological filament finder to systematically identify galaxy groups in the infall regions around massive clusters. The large random motions and infall velocities of... Read More about The localization of galaxy groups in close proximity to galaxy clusters using cosmic web nodes.

The co-evolution of strong AGN and central galaxies in different environments (2023)
Journal Article
Sampaio, V. M., Aragón-Salamanca, A., Merrifield, M. R., De Carvalho, R. R., Zhou, S., & Ferreras, I. (2023). The co-evolution of strong AGN and central galaxies in different environments. Monthly Notices of the Royal Astronomical Society, 524(4), 5327–5339. https://doi.org/10.1093/mnras/stad2211

We exploit a sample of 80 000 Sloan Digital Sky Survey central galaxies to investigate the effect of active galactic nucleus (AGN) feedback on their evolution. We trace the demographics of optically selected AGN (Seyferts) as a function of their inte... Read More about The co-evolution of strong AGN and central galaxies in different environments.

The probability of identifying the cosmic web environment of galaxies around clusters motivated by the Weave Wide Field Cluster Survey (2023)
Journal Article
Cornwell, D. J., Aragón-Salamanca, A., Kuchner, U., Gray, M. E., Pearce, F. R., & Knebe, A. (2023). The probability of identifying the cosmic web environment of galaxies around clusters motivated by the Weave Wide Field Cluster Survey. Monthly Notices of the Royal Astronomical Society, 524(2), 2148–2160. https://doi.org/10.1093/mnras/stad1949

Upcoming wide-field spectroscopic surveys will observe galaxies in a range of cosmic web environments in and around galaxy clusters. In this paper, we test and quantify how successfully we will be able to identify the environment of individual galaxi... Read More about The probability of identifying the cosmic web environment of galaxies around clusters motivated by the Weave Wide Field Cluster Survey.

The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation (2023)
Journal Article
Jin, S., Trager, S. C., Dalton, G. B., Aguerri, J. A. L., Drew, J. E., Falcón-Barroso, J., …Zurita, C. (2024). The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation. Monthly Notices of the Royal Astronomical Society, 530(3), 2688-2730. https://doi.org/10.1093/mnras/stad557

WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for the William Herschel Telescope, saw first light in late 2022. WEAVE comprises a new 2-deg field-of-view prime-focus corrector system, a nearly 1000-multiplex fibre pos... Read More about The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation.

Lessons learned from the two largest Galaxy morphological classification catalogues built by convolutional neural networks (2022)
Journal Article
Cheng, T. Y., Domínguez Sánchez, H., Vega-Ferrero, J., Conselice, C. J., Siudek, M., Aragón-Salamanca, A., …Scarpine, V. (2023). Lessons learned from the two largest Galaxy morphological classification catalogues built by convolutional neural networks. Monthly Notices of the Royal Astronomical Society, 518(2), 2794–2809. https://doi.org/10.1093/mnras/stac3228

We compare the two largest galaxy morphology catalogues, which separate early- and late-type galaxies at intermediate redshift. The two catalogues were built by applying supervised deep learning (convolutional neural networks, CNNs) to the Dark Energ... Read More about Lessons learned from the two largest Galaxy morphological classification catalogues built by convolutional neural networks.

Forecasting the success of the WEAVE Wide-Field Cluster Survey on the extraction of the cosmic web filaments around galaxy clusters (2022)
Journal Article
Cornwell, D. J., Kuchner, U., Aragón-Salamanca, A., Gray, M. E., Pearce, F. R., Aguerri, J. A. L., …Trager, S. C. (2022). Forecasting the success of the WEAVE Wide-Field Cluster Survey on the extraction of the cosmic web filaments around galaxy clusters. Monthly Notices of the Royal Astronomical Society, 517(2), 1678–1694. https://doi.org/10.1093/mnras/stac2777

Next-generation wide-field spectroscopic surveys will observe the infall regions around large numbers of galaxy clusters with high sampling rates for the first time. Here we assess the feasibility of extracting the large-scale cosmic web around clust... Read More about Forecasting the success of the WEAVE Wide-Field Cluster Survey on the extraction of the cosmic web filaments around galaxy clusters.

SDSS-IV MaNGA: the chemical co-evolution of gas and stars in spiral galaxies (2022)
Journal Article
Greener, M. J., Aragón-Salamanca, A., Merrifield, M., Peterken, T., Sazonova, E., Haggar, R., …Pan, K. (2022). SDSS-IV MaNGA: the chemical co-evolution of gas and stars in spiral galaxies. Monthly Notices of the Royal Astronomical Society, 516(1), 1275–1288. https://doi.org/10.1093/mnras/stac2355

We investigate archaeologically how the metallicity in both stellar and gaseous components of spiral galaxies of differing masses evolve with time, using data from the SDSS-IV MaNGA survey. For the stellar component, we can measure this evolution dir... Read More about SDSS-IV MaNGA: the chemical co-evolution of gas and stars in spiral galaxies.

SDSS-IV MaNGA: How the stellar populations of passive central galaxies depend on stellar and halo mass (2022)
Journal Article
Oyarzun, G. A., Bundy, K., Westfall, K. B., Tinker, J. L., Belfiore, F., Argudo-Fernandez, M., …Zhang, K. (2022). SDSS-IV MaNGA: How the stellar populations of passive central galaxies depend on stellar and halo mass. Astrophysical Journal, 933(1), Article 88. https://doi.org/10.3847/1538-4357/ac7048

We analyze spatially resolved and co-added SDSS-IV MaNGA spectra with signal-to-noise ratio ∼100 from 2200 passive central galaxies (z ∼ 0.05) to understand how central galaxy assembly depends on stellar mass (M*) and halo mass (Mh). We control for s... Read More about SDSS-IV MaNGA: How the stellar populations of passive central galaxies depend on stellar and halo mass.

SDSS-IV MaNGA: Cannibalism Caught in the Act - On the Frequency of Occurrence of Multiple Cores in Brightest Cluster Galaxies (2022)
Journal Article
Hsu, Y. H., Lin, Y. T., Huang, S., Nelson, D., Rodriguez-Gomez, V., Lai, H. T., …Schneider, D. P. (2022). SDSS-IV MaNGA: Cannibalism Caught in the Act - On the Frequency of Occurrence of Multiple Cores in Brightest Cluster Galaxies. Astrophysical Journal, 933(1), Article 61. https://doi.org/10.3847/1538-4357/ac6d66

Although it is generally accepted that massive galaxies form in a two-phased fashion, beginning with a rapid mass buildup through intense starburst activities followed by primarily dry mergers that mainly deposit stellar mass at outskirts, the late t... Read More about SDSS-IV MaNGA: Cannibalism Caught in the Act - On the Frequency of Occurrence of Multiple Cores in Brightest Cluster Galaxies.

The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar, and APOGEE-2 Data (2022)
Journal Article
Abdurro’uf, Accetta, K., Aerts, C., Silva Aguirre, V., Ahumada, R., Ajgaonkar, N., …Zhu, K. (2022). The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar, and APOGEE-2 Data. Astrophysical Journal Supplement, 259(2), Article 35. https://doi.org/10.3847/1538-4365/ac4414

This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the complete release of the Mapping Nearby Galaxies at Apache Point Observatory (M... Read More about The Seventeenth Data Release of the Sloan Digital Sky Surveys: Complete Release of MaNGA, MaStar, and APOGEE-2 Data.

An inventory of galaxies in cosmic filaments feeding galaxy clusters: galaxy groups, backsplash galaxies, and pristine galaxies (2021)
Journal Article
Kuchner, U., Haggar, R., Aragón-Salamanca, A., Pearce, F. R., Gray, M. E., Rost, A., …Yepes, G. (2022). An inventory of galaxies in cosmic filaments feeding galaxy clusters: galaxy groups, backsplash galaxies, and pristine galaxies. Monthly Notices of the Royal Astronomical Society, 510(1), 581-592. https://doi.org/10.1093/mnras/stab3419

Galaxy clusters grow by accreting galaxies from the field and along filaments of the cosmic web. As galaxies are accreted they are affected by their local environment before they enter (pre-processing), and traverse the cluster potential. Observation... Read More about An inventory of galaxies in cosmic filaments feeding galaxy clusters: galaxy groups, backsplash galaxies, and pristine galaxies.

H α-based star formation rates in and around z ∼ 0.5 EDisCS clusters (2021)
Journal Article
Cooper, J. R., Rudnick, G. H., Brammer, G. G., Desjardins, T., Mann, J. L., Weiner, B. J., …Zaritsky, D. (2022). H α-based star formation rates in and around z ∼ 0.5 EDisCS clusters. Monthly Notices of the Royal Astronomical Society, 509(4), 5382-5398. https://doi.org/10.1093/mnras/stab3184

We investigate the role of environment on star formation rates (SFRs) of galaxies at various cosmic densities in well-studied clusters. We present the star-forming main sequence for 163 galaxies in four EDisCS clusters in the range 0.4 < z < 0.7. We... Read More about H α-based star formation rates in and around z ∼ 0.5 EDisCS clusters.

From blue cloud to red sequence: Evidence of morphological transition prior to star formation quenching (2021)
Journal Article
Sampaio, V. M., De Carvalho, R. R., Ferreras, I., Aragón Salamanca, A., & Parker, L. C. (2022). From blue cloud to red sequence: Evidence of morphological transition prior to star formation quenching. Monthly Notices of the Royal Astronomical Society, 509(1), 567-585. https://doi.org/10.1093/mnras/stab3018

We present a study of a sample of 254 clusters from the SDSS-DR7 Yang Catalogue and an auxiliary sample of field galaxies to perform a detailed investigation on how galaxy quenching depends on both environment and galaxy stellar mass. Our samples are... Read More about From blue cloud to red sequence: Evidence of morphological transition prior to star formation quenching.

Galaxy Morphological Classification Catalogue of the Dark Energy Survey Year 3 data with Convolutional Neural Networks (2021)
Journal Article
Cheng, T.-Y., Conselice, C. J., Aragón-Salamanca, A., Aguena, M., Allam, S., Andrade-Oliveira, F., …To, C. (2021). Galaxy Morphological Classification Catalogue of the Dark Energy Survey Year 3 data with Convolutional Neural Networks. Monthly Notices of the Royal Astronomical Society, 507(3), 4425-4444. https://doi.org/10.1093/mnras/stab2142

We present in this paper one of the largest galaxy morphological classification catalogues to date, including over 20 million of galaxies, using the Dark Energy Survey (DES) Year 3 data based on Convolutional Neural Networks (CNN). Monochromatic i-ba... Read More about Galaxy Morphological Classification Catalogue of the Dark Energy Survey Year 3 data with Convolutional Neural Networks.

Beyond the Hubble Sequence - Exploring Galaxy Morphology with Unsupervised Machine Learning (2021)
Journal Article
Cheng, T.-Y., Huertas-Company, M., Conselice, C. J., Aragón-Salamanca, A., Robertson, B. E., & Ramachandra, N. (2021). Beyond the Hubble Sequence - Exploring Galaxy Morphology with Unsupervised Machine Learning. Monthly Notices of the Royal Astronomical Society, 503(3), 4446-4465. https://doi.org/10.1093/mnras/stab734

We explore unsupervised machine learning for galaxy morphology analyses using a combination of feature extraction with a vector-quantised variational autoencoder (VQ-VAE) and hierarchical clustering (HC). We propose a new methodology that includes: (... Read More about Beyond the Hubble Sequence - Exploring Galaxy Morphology with Unsupervised Machine Learning.

Cosmic filaments in galaxy cluster outskirts: quantifying finding filaments in redshift space (2021)
Journal Article
Kuchner, U., Aragón-Salamanca, A., Rost, A., Pearce, F. R., Gray, M. E., Cui, W., …Yepes, G. (2021). Cosmic filaments in galaxy cluster outskirts: quantifying finding filaments in redshift space. Monthly Notices of the Royal Astronomical Society, 503(2), 2065-2076. https://doi.org/10.1093/mnras/stab567

Inferring line-of-sight distances from redshifts in and around galaxy clusters is complicated by peculiar velocities, a phenomenon known as the "Fingers of God" (FoG). This presents a significant challenge for finding filaments in large observational... Read More about Cosmic filaments in galaxy cluster outskirts: quantifying finding filaments in redshift space.

Size, shade or shape? The contribution of galaxies of different types to the star-formation history of the Universe from SDSS-IV MaNGA (2021)
Journal Article
Peterken, T., Aragón-Salamanca, A., Merrifield, M., Avila-Reese, V., Boardman, N. F., Sánchez, H. D., …Brownstein, J. R. (2021). Size, shade or shape? The contribution of galaxies of different types to the star-formation history of the Universe from SDSS-IV MaNGA. Monthly Notices of the Royal Astronomical Society, 502(3), 3128–3143. https://doi.org/10.1093/mnras/stab268

SDSS-IV MaNGA: when is morphology imprinted on galaxies? (2020)
Journal Article
Peterken, T., Merrifield, M., Aragón-Salamanca, A., Avila-Reese, V., Boardman, N. F., Drory, N., & Lane, R. R. (2021). SDSS-IV MaNGA: when is morphology imprinted on galaxies?. Monthly Notices of the Royal Astronomical Society: Letters, 500(1), L42-L46. https://doi.org/10.1093/mnrasl/slaa179

It remains an open question as to how long ago the morphology that we see in a present-day galaxy was typically imprinted. Studies of galaxy populations at different redshifts reveal that the balance of morphologies has changed over time, but such sn... Read More about SDSS-IV MaNGA: when is morphology imprinted on galaxies?.