All Outputs (62)

The separate effect of halo mass and stellar mass on the evolution of massive disk galaxies (2024)
Journal Article
Zhou, S., Aragón-Salamanca, A., & Merrifield, M. (in press). The separate effect of halo mass and stellar mass on the evolution of massive disk galaxies. Monthly Notices of the Royal Astronomical Society, 1-13. https://doi.org/10.1093/mnras/stae1127

We analyse a sample of massive disk galaxies selected from the SDSS-IV/MaNGA survey to investigate how the evolution of these galaxies depends on their stellar and halo masses. We applied a semi-analytic spectral fitting approach to the data from dif... Read More about The separate effect of halo mass and stellar mass on the evolution of massive disk galaxies.

Where have all the low-metallicity galaxies gone? Tracing evolution in the mass-metallicity plane since a redshift of 0.7 (2023)
Journal Article
Zhou, S., Aragón-Salamanca, A., Merrifield, M., & Sampaio, V. M. (2023). Where have all the low-metallicity galaxies gone? Tracing evolution in the mass-metallicity plane since a redshift of 0.7. Monthly Notices of the Royal Astronomical Society, 527(2), 1935–1949. https://doi.org/10.1093/mnras/stad3330

Even over relatively recent epochs, galaxies have evolved significantly in their location in the mass–metallicity plane, which must be telling us something about the latter stages of galaxy evolution. In this paper, we analyse data from the LEGA-C su... Read More about Where have all the low-metallicity galaxies gone? Tracing evolution in the mass-metallicity plane since a redshift of 0.7.

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 role of mass and environment in the build-up of the quenched galaxy population since cosmic noon (2023)
Journal Article
Taylor, E., Almaini, O., Merrifield, M., Maltby, D., Wild, V., Hartley, W. G., & Rowlands, K. (2023). The role of mass and environment in the build-up of the quenched galaxy population since cosmic noon. Monthly Notices of the Royal Astronomical Society, 522(2), 2297-2306. https://doi.org/10.1093/mnras/stad1098

We conduct the first study of how the relative quenching probability of galaxies depends on environment over the redshift range 0.5 < z < 3, using data from the UKIDSS Ultra-Deep Survey. By constructing the stellar mass functions for quiescent and po... Read More about The role of mass and environment in the build-up of the quenched galaxy population since cosmic noon.

Are Milky-Way-like galaxies like the Milky Way? A view from SDSS-IV/MaNGA (2023)
Journal Article
Zhou, S., Aragón-Salamanca, A., Merrifield, M., Andrews, B. H., Drory, N., & Lane, R. R. (2023). Are Milky-Way-like galaxies like the Milky Way? A view from SDSS-IV/MaNGA. Monthly Notices of the Royal Astronomical Society, 521(4), 5810-5825. https://doi.org/10.1093/mnras/stad853

In this paper, we place the Milky Way (MW) in the context of similar-looking galaxies in terms of their star-formation and chemical evolution histories. We select a sample of 138 Milky Way analogues (MWAs) from the SDSS-IV/MaNGA survey based on their... Read More about Are Milky-Way-like galaxies like the Milky Way? A view from SDSS-IV/MaNGA.

The impact of environment on the lives of disc galaxies as revealed by SDSS-IV MaNGA (2022)
Journal Article
Zhou, S., Merrifield, M., Aragón-Salamanca, A., Brownstein, J. R., Drory, N., Yan, R., & Lane, R. R. (2022). The impact of environment on the lives of disc galaxies as revealed by SDSS-IV MaNGA. Monthly Notices of the Royal Astronomical Society, 517(3), 3723-3731. https://doi.org/10.1093/mnras/stac2913

Environment has long been known to have significant impact on the evolution of galaxies, but here we seek to quantify the subtler differences that might be found in disc galaxies, depending on whether they are isolated, the most massive galaxy in a g... Read More about The impact of environment on the lives of disc galaxies as revealed by SDSS-IV MaNGA.

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: 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.

Semi-analytic spectral fitting: simultaneously modelling the mass accumulation and chemical evolution in MaNGA spiral galaxies (2022)
Journal Article
Zhou, S., Merrifield, M., & Aragón-Salamanca, A. (2022). Semi-analytic spectral fitting: simultaneously modelling the mass accumulation and chemical evolution in MaNGA spiral galaxies. Monthly Notices of the Royal Astronomical Society, 513(4), 5446-5464. https://doi.org/10.1093/mnras/stac1279

We develop a novel semi-analytic spectral fitting approach to quantify the star-formation histories (SFHs) and chemical enrichment histories (ChEHs) of individual galaxies. We construct simple yet general chemical evolution models that account for ga... Read More about Semi-analytic spectral fitting: simultaneously modelling the mass accumulation and chemical evolution in MaNGA spiral galaxies.

Photometric Signature of Ultraharmonic Resonances in Barred Galaxies (2022)
Journal Article
Krishnarao, D., Pace, Z. J., D’Onghia, E., Aguerri, J. A. L., McClure, R. L., Peterken, T., …Lane, R. R. (2022). Photometric Signature of Ultraharmonic Resonances in Barred Galaxies. Astrophysical Journal, 929(2), Article 112. https://doi.org/10.3847/1538-4357/ac5d55

Bars may induce morphological features, such as rings, through their resonances. Previous studies suggested that the presence of "dark gaps,"or regions of a galaxy where the difference between the surface brightness along the bar major axis and that... Read More about Photometric Signature of Ultraharmonic Resonances in Barred 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.

SDSS-IV MaStar: Theoretical atmospheric parameters for the MaNGA stellar library (2021)
Journal Article
Hill, L., Thomas, D., Maraston, C., Yan, R., Neumann, J., Lundgren, A., …Beers, T. C. (2022). SDSS-IV MaStar: Theoretical atmospheric parameters for the MaNGA stellar library. Monthly Notices of the Royal Astronomical Society, 509(3), 4308-4329. https://doi.org/10.1093/mnras/stab3263

We calculate the fundamental stellar parameters effective temperature, surface gravity, and iron abundance - Teff, log g, [Fe/H] - for the final release of the Mapping Nearby Galaxies at APO (MaNGA) Stellar Library (MaStar), containing 59 266 per-vis... Read More about SDSS-IV MaStar: Theoretical atmospheric parameters for the MaNGA stellar library.

Galaxy Zoo: 3D - Crowdsourced bar, spiral, and foreground star masks for MaNGA target galaxies (2021)
Journal Article
Masters, K. L., Krawczyk, C., Shamsi, S., Todd, A., Finnegan, D., Bershady, M., …Yan, R. (2021). Galaxy Zoo: 3D - Crowdsourced bar, spiral, and foreground star masks for MaNGA target galaxies. Monthly Notices of the Royal Astronomical Society, 507(3), 3923-3935. https://doi.org/10.1093/mnras/stab2282

The challenge of consistent identification of internal structure in galaxies - in particular disc galaxy components like spiral arms, bars, and bulges - has hindered our ability to study the physical impact of such structure across large samples. In... Read More about Galaxy Zoo: 3D - Crowdsourced bar, spiral, and foreground star masks for MaNGA target galaxies.

Clusters' far-reaching influence on narrow-angle tail radio galaxies (2021)
Journal Article
de Vos, K., Hatch, N. A., Merrifield, M. R., & Mingo, B. (2021). Clusters' far-reaching influence on narrow-angle tail radio galaxies. Monthly Notices of the Royal Astronomical Society: Letters, 506(1), L55-L58. https://doi.org/10.1093/mnrasl/slab075

In order to study the ram-pressure interaction between radio galaxies and the intracluster medium, we analyse a sample of 208 highly bent narrow-angle tail radio sources (NATs) in clusters, detected by the Low-Frequency Array Two-metre Sky Survey. Fo... Read More about Clusters' far-reaching influence on narrow-angle tail radio galaxies.

An analytical model to kinematically identify thin discs in MaNGA galaxies (2021)
Journal Article
Bershady, M. A., Weijmans, A., Yang, M., Boardman, N. F., Merrifield, M., & Drory, N. (2021). An analytical model to kinematically identify thin discs in MaNGA galaxies. Monthly Notices of the Royal Astronomical Society, 504(2), 2658-2669. https://doi.org/10.1093/mnras/stab1049

We present an analytical model to identify thin discs in galaxies, and apply this model to a sample of SDSS MaNGA galaxies. This model fits the velocity and velocity dispersion fields of galaxies with regular kinematics. By introducing two parameters... Read More about An analytical model to kinematically identify thin discs in MaNGA galaxies.

Infrared lags in the light curves of AGN measured using a deep survey (2021)
Journal Article
Elmer, E., Merrifield, M., Almaini, O., Hartley, W. G., & Maltby, D. T. (2021). Infrared lags in the light curves of AGN measured using a deep survey. Monthly Notices of the Royal Astronomical Society: Letters, 503(1), L47-L50. https://doi.org/10.1093/mnrasl/slab023

Information on the structure around active galactic nuclei (AGNs) has long been derived from measuring lags in their varying light output at different wavelengths. In principle, infrared data would reach to larger radii, potentially even probing repr... Read More about Infrared lags in the light curves of AGN measured using a deep survey.

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: the “G-dwarf problem” revisited (2021)
Journal Article
Greener, M. J., Merrifield, M., Aragón-Salamanca, A., Peterken, T., Andrews, B., & Lane, R. R. (2021). SDSS-IV MaNGA: the “G-dwarf problem” revisited. Monthly Notices of the Royal Astronomical Society: Letters, 502(1), L95–L98. https://doi.org/10.1093/mnrasl/slab012

The levels of heavy elements in stars are the product of enhancement by previous stellar generations, and the distribution of this metallicity among the population contains clues to the process by which a galaxy formed. Most famously, the “G-dwarf pr... Read More about SDSS-IV MaNGA: the “G-dwarf problem” revisited.

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?.

Resolving the Disc–Halo Degeneracy – II: NGC 6946 (2020)
Journal Article
Aniyan, S., Ponomareva, A. A., Freeman, K. C., Arnaboldi, M., Gerhard, O. E., Coccato, L., …Merrifield, M. (2021). Resolving the Disc–Halo Degeneracy – II: NGC 6946. Monthly Notices of the Royal Astronomical Society, 500(3), 3579-3593. https://doi.org/10.1093/mnras/staa3106

The mass-to-light ratio (M/L) is a key parameter in decomposing galactic rotation curves into contributions from the baryonic components and the dark halo of a galaxy. One direct observational method to determine the disc M/L is by calculating the su... Read More about Resolving the Disc–Halo Degeneracy – II: NGC 6946.