Article
Astronomy & Astrophysics
Qian-Hui Chen, Kathryn Grasha, Andrew J. Battisti, Lisa J. Kewley, Barry F. Madore, Mark Seibert, Jeff A. Rich, Rachael L. Beaton
Summary: The study investigates the metallicity gradients in five nearby galaxies using the TYPHOON/PrISM survey and finds that galactic bars play a significant role in mixing material and affecting the radial migration in galaxies. It also identifies cases where the bar flattens or drives a steeper metallicity gradient.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Estrella Florido, Almudena Zurita, Enrique Perez-Montero
Summary: This study uses a sample of 536 H ii regions in nearby spiral galaxies to obtain new empirical calibrations of several strong-line indices to estimate nitrogen-to-oxygen abundance ratio. The study shows strong correlations between all indices and log (N/O) based on T-e, even stronger than with 12 + log (O/H). N2O2 is the most strongly correlated index, and a second-order polynomial provides the best fit to the log (N/O)-N2O2 relation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Z. S. Hemler, Paul Torrey, Jia Qi, Lars Hernquist, Mark Vogelsberger, Xiangcheng Ma, Lisa J. Kewley, Dylan Nelson, Annalisa Pillepich, Ruediger Pakmor, Federico Marinacci
Summary: The study presents radial gas-phase, mass-weighted metallicity profiles and gradients of the TNG50 star-forming galaxy population at redshifts z = 0-3, finding predominantly negative gradients with a roughly constant growth rate with redshift. While there is a weak correlation between gradient steepness and galaxy stellar mass, this correlation disappears when normalizing the gradients by a characteristic radius defined by the galactic star formation distribution. The study also compares TNG50 gradients with those observed in high-redshift galaxies and highlights the need for simulation models to incorporate more powerful radial gas mixing mechanisms within the ISM to match potential observations from future telescopes like JWST and ELT.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Alex M. Garcia, Paul Torrey, Z. S. Hemler, Lars Hernquist, Lisa J. Kewley, Erica J. Nelson, Kathryn Grasha, Henry R. M. Zovaro, Qian-Hui Chen
Summary: We present radial gas-phase metallicity profiles, gradients, and break radii in star-forming galaxies at redshift z = 0-3 using the TNG50-1 simulation. The profiles reveal a steep inner gradient and a flat outer gradient, with a break radius marking the transition region. We find that the break radius shows a positive trend with mass that weakens with redshift, and when normalized by stellar half-mass radius, the relation with mass and redshift becomes weaker.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
M. A. Lara-Lopez, L. S. Pilyugin, J. Zaragoza-Cardiel, I. A. Zinchenko, O. Lopez-Cruz, S. P. O'Sullivan, M. E. De Rossi, S. Dib, L. E. Garduno, M. Rosado, M. Sanchez-Cruces, M. Valerdi
Summary: This paper explores the connection between SNRs and H I holes in NGC 6946, as well as their physical implications on observational optical properties. The study finds that SNRs are concentrated at the rims of H I holes, and the rims also exhibit enhanced star formation rate and extinction. Additionally, the oxygen abundance and ionization parameter show hints of enhancement on the rims, suggesting induced star formation.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
L. S. Pilyugin, G. Tautvaisiene, M. A. Lara-Lopez
Summary: Researchers searched for Milky Way-like galaxies among a sample of approximately 500 galaxies. They considered the stellar mass, optical radius, rotation velocity, central oxygen abundance, and abundance at the optical radius as the characteristics of the candidate galaxies. If a candidate galaxy had values close to that of the Milky Way, it was referred to as a structural Milky Way analogue. The similarity of oxygen abundance in two galaxies suggested a similarity in their chemical evolution. By considering the structural and evolutionary characteristics, four galaxies were identified as Milky Way twins.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
A. Zurita, E. Florido, F. Bresolin, I Perez, E. Perez-Montero
Summary: This study investigates the radial distribution of metals in the gas-phase of spiral galaxies with and without bars, finding that the difference in slope depends on galaxy luminosity. The results suggest different abundance gradients for barred and unbarred galaxies, with the former having shallower gradients in the whole luminosity range. This study reconciles previous conflicting findings and discusses the implications for disc evolution and radial mixing induced by bars and spiral arms.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
A. Zurita, E. Florido, F. Bresolin, E. Perez-Montero, I Perez
Summary: Recent studies have shown a decreased importance of galactic bars in affecting the radial metallicity profiles in spiral galaxies compared to results from the 1990s. This research has collected a large sample of HII region emission-line fluxes from 51 nearby galaxies to revisit the impact of bars on the radial metal distribution in spirals. The methodology used is homogeneous across the entire data sample and includes the analysis of chemical abundances, structural parameters of bars and discs, galactocentric distances, and radial abundance profiles.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
F. Pistis, A. Pollo, M. Scodeggio, M. Figueira, A. Durkalec, K. Malek, A. Iovino, D. Vergani, S. Salim
Summary: This study focuses on comparing galaxy samples with different characteristics and examines the effects of selection biases on the fundamental metallicity relation (FMR). The results show that the median metallicities of samples at z similar to 0 and z similar to 0.7 are consistent, taking into account the biases. The study also reveals the influence of biases on the FMR projections.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
K. A. Lutz, A. Saintonge, B. Catinella, L. Cortese, F. Eisenhauer, C. Kramer, S. M. Moran, L. J. Tacconi, B. Vollmer, J. Wang
Summary: By analyzing longslit spectra of galaxies, it was found that local metallicity is correlated with global HI mass fraction, and the primary driver of metallicity gradients appears to be stellar mass surface density.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Matthew E. Orr, Blakesley Burkhart, Andrew Wetzel, Philip F. Hopkins, Ivanna A. Escala, Allison L. Strom, Paul F. Goldsmith, Jorge L. Pineda, Christopher C. Hayward, Sarah R. Loebman
Summary: We studied the azimuthal variations in gas-phase metallicity profiles in Milky Way-mass disc galaxies using simulated data from the FIRE-2 cosmological zoom-in simulation suite. Our findings showed that the spiral arms exhibit a pattern of metal rich and metal poor regions, with variations of less than or similar to 0.1 dex. This pattern persists even with different strengths of metal mixing, suggesting that it emerges from physics above the sub-grid scale. Local enrichment does not seem to be the dominant source of these variations, as there is no correlation with local star formation. Instead, the arms act as freeways, channeling relatively metal poor gas inward and relatively enriched gas outward.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Nimisha Kumari, Roberto Maiolino, James Trussler, Filippo Mannucci, Giovanni Cresci, Mirko Curti, Alessandro Marconi, Francesco Belfiore
Summary: This study extends the Fundamental Metallicity Relation (FMR) to galaxies classified as non-star-forming in the BPT diagrams, finding that galaxies with higher-than-main-sequence SFR are more metal-poor than their counterparts on the main sequence, while low-mass galaxies have higher metallicities than their main sequence counterparts.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Michael J. Greener, Alfonso Aragon-Salamanca, Michael Merrifield, Thomas Peterken, Elizaveta Sazonova, Roan Haggar, Dmitry Bizyaev, Joel R. Brownstein, Richard R. Lane, Kaike Pan
Summary: We archaeologically investigate the evolution of metallicity in both stellar and gaseous components of spiral galaxies of differing masses using SDSS-IV MaNGA survey data. We directly measure the metallicity evolution of the stellar component by analyzing absorption-line spectra and infer the variation in gas metallicity over cosmic time based on the established relationship between gas metallicity, stellar mass, and star formation rate. Our analysis of 1619 spiral galaxies reveals that the metallicity of lower-mass galaxies increases together in both stellar and gaseous components, while in higher-mass systems, the average stellar metallicity does not increase in step with the inferred gas metallicity and actually decreases over time.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Michael J. Greener, Michael Merrifield, Alfonso Aragon-Salamanca, Thomas Peterken, Brett Andrews, Richard R. Lane
Summary: The heavy elements in stars are influenced by previous stellar generations, providing insight into galaxy formation. High-mass spirals typically exhibit a shortage of low-metallicity stars, suggesting a common history of gas accretion with the Milky Way. In contrast, low-mass spirals do not show a G-dwarf problem, indicating a metallicity distribution consistent with a closed box model.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Thomas G. Williams, Kathryn Kreckel, Francesco Belfiore, Brent Groves, Karin Sandstrom, Francesco Santoro, Guillermo A. Blanc, Frank Bigiel, Mederic Boquien, Melanie Chevance, Enrico Congiu, Eric Emsellem, Simon C. O. Glover, Kathryn Grasha, Ralf S. Klessen, Eric Koch, J. M. Diederik Kruijssen, Adam K. Leroy, Daizhong Liu, Sharon Meidt, Hsi-An Pan, Miguel Querejeta, Erik Rosolowsky, Toshiki Saito, Patricia Sanchez-Blazquez, Eva Schinnerer, Andreas Schruba, Elizabeth J. Watkins
Summary: Understanding the spatial distribution of metals within galaxies can help us study the processes of chemical enrichment and mixing in the interstellar medium. Mapping the 2D distribution of metals in 19 star-forming galaxies using Gaussian Process Regression revealed significant variations in 12 galaxies. The study found that the evolutionary state and current star formation activity of galaxies may be the strongest indicators of the homogeneity of the metal distribution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Agronomy
Michail L. Giannitsopoulos, Paul J. Burgess, Matthew J. Bell, Goetz M. Richter, Cairistiona F. E. Topp, Julie Ingram, Taro Takahashi
Summary: This study developed a grass yield simulation model for England and Wales, called LINGRA-N-Plus, and evaluated its strengths and weaknesses as a teaching tool. Feedback from students and practitioners led to improvements in user interface and the addition of new algorithms, expanding the scope of the model without reducing comprehension. The model was found to be beneficial for understanding the effects of decisions on grass yields.
GRASS AND FORAGE SCIENCE
(2023)
Article
Astronomy & Astrophysics
Egidijus Kukstas, Michael L. Balogh, Ian G. McCarthy, Yannick M. Bahe, Gabriella De Lucia, Pascale Jablonka, Benedetta Vulcani, Devontae C. Baxter, Andrea Biviano, Pierluigi Cerulo, Jeffrey C. Chan, M. C. Cooper, Ricardo Demarco, Alexis Finoguenov, Andreea S. Font, Chris Lidman, Justin Marchioni, Sean McGee, Adam Muzzin, Julie Nantais, Lyndsay Old, Irene Pintos-Castro, Bianca Poggianti, Andrew M. M. Reeves, Gregory Rudnick, Florian Sarron, Remco van der Burg, Kristi Webb, Gillian Wilson, Howard K. C. Yee, Dennis Zaritsky
Summary: Recent observations have shown that the environmental quenching of galaxies at z ≈ 1 is different from that in the local Universe. However, the physical origin of these differences is still unclear. In this study, we compare three state-of-the-art simulations with observations to gain insight into the evolution of environmental quenching. We find that while the simulations generally reproduce the stellar content of galaxies in the field, they struggle to capture the observed quenching of satellites in the cluster environment.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
T-Y Cheng, H. Dominguez Sanchez, J. Vega-Ferrero, C. J. Conselice, M. Siudek, A. Aragon-Salamanca, M. Bernardi, R. Cooke, L. Ferreira, M. Huertas-Company, J. Krywult, A. Palmese, A. Pieres, A. A. Plazas Malagon, A. Carnero Rosell, D. Gruen, D. Thomas, D. Bacon, D. Brooks, D. J. James, D. L. Hollowood, D. Friedel, E. Suchyta, E. Sanchez, F. Menanteau, F. Paz-Chinchon, G. Gutierrez, G. Tarle, I Sevilla-Noarbe, I Ferrero, J. Annis, J. Frieman, J. Garcia-Bellido, J. Mena-Fernandez, K. Honscheid, K. Kuehn, L. N. da Costa, M. Gatti, M. Raveri, M. E. S. Pereira, M. Rodriguez-Monroy, M. Smith, M. Carrasco Kind, M. Aguena, M. E. C. Swanson, N. Weaverdyck, P. Doel, R. Miquel, R. L. C. Ogando, R. A. Gruendl, S. Allam, S. R. Hinton, S. Dodelson, S. Bocquet, S. Desai, S. Everett, V Scarpine
Summary: This article compares two largest galaxy morphology catalogues, which classify early- and late-type galaxies at intermediate redshift. The catalogues were built using deep learning (CNNs) applied to Dark Energy Survey data. Despite methodological differences, the agreement between the two catalogues is excellent up to i < 19, showing reliable CNN predictions for samples one magnitude fainter than the training sample limit.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Syeda Lammim Ahad, Yannick M. Bahe, Henk Hoekstra
Summary: The study explores the challenges in detecting and interpreting the diffuse light within galaxy groups and clusters. It finds that the brightest galaxy in a group is not always at the center of the gravitational potential, leading to potential miscentring. However, this miscentring has minimal impact on the average mass density and surface brightness profiles.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Edoardo Altamura, Scott T. Kay, Richard G. Bower, Matthieu Schaller, Yannick M. Bahe, Joop Schaye, Josh Borrow, Imogen Towler
Summary: Recent cosmological simulations predict high entropy levels in the intra-cluster medium, contradicting X-ray observations. This study investigates the impact of different sub-grid models on the central entropy and profile shape in zoom-in cosmological simulations using the EAGLE galaxy formation model. The results indicate that changes in the sub-grid models can affect the entropy levels and profile shape.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Regina Sarmiento, Marc Huertas-Company, Johan H. Knapen, Hector Ibarra-Medel, Annalisa Pillepich, Sebastian F. Sanchez, Alina Boecker
Summary: Modern astronomical observations provide valuable information about nearby galaxies, but they can only capture the present-day state of the Universe. Cosmological simulations allow us to study the past processes that galaxies have undergone. This study aims to connect the past events with present-day galactic properties by using hydro-cosmological simulations to generate a mock MaNGA sample for stellar population analysis.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Thomas W. -S. Holoien, Vera L. Berger, Jason T. Hinkle, L. Galbany, Allison L. Strom, Patrick J. Vallely, Joseph P. Anderson, Konstantina Boutsia, K. D. French, Christopher S. Kochanek, Hanindyo Kuncarayakti, Joseph D. Lyman, Nidia Morrell, Jose L. Prieto, Sebastian F. Sanchez, K. Z. Stanek, Gregory L. Walth
Summary: We analyze 44 low-luminosity host galaxies of Type Ia supernovae using emission lines to measure metallicities and star formation rates. There is no significant evidence that the star formation activity and metallicities of the galaxies in our sample are different from similar galaxies. We find two outlier galaxies with high metallicities, but their other properties are consistent with general galaxies.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
David J. Setton, Biprateep Dey, Gourav Khullar, Rachel Bezanson, Jeffrey A. Newman, Jessica N. Aguilar, Steven Ahlen, Brett H. Andrews, David Brooks, Axel de la Macorra, Arjun Dey, Sarah Eftekharzadeh, Andreu Font-Ribera, Satya Gontcho Gontcho, Anthony Kremin, Stephanie Juneau, Martin Landriau, Aaron Meisner, Ramon Miquel, John Moustakas, Alan Pearl, Francisco Prada, Gregory Tarle, Malgorzata Siudek, Benjamin Alan Weaver, Zhimin Zhou, Hu Zou
Summary: We analyze a sample of over 17,000 red galaxies to study their contribution to the massive galaxy population at different redshifts. Using deep spectra, we identify a significant population of recently quenched galaxies that have transitioned to a quiescent state within the past billion years. These galaxies make up a growing fraction of the massive galaxy population over time. By quantifying the stellar mass formation rate of each galaxy, we find that the percentage of recently quenched galaxies increases with redshift, with some galaxies forming over 50% of their stellar mass within the past billion years. This unprecedented dataset offers valuable insights into the quenching process of massive galaxies.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
V Avila-Reese, H. Ibarra-Medel, I Lacerna, A. Rodriguez-Puebla, J. A. Vazquez-Mata, S. F. Sanchez, H. M. Hernandez-Toledo, C. Cannarozzo
Summary: Using fossil record analysis, we studied the evolutionary behaviors of 'red and dead' elliptical galaxies. We reconstructed the radial gradients in mass-to-luminosity ratio, color, and specific star formation rate. Our findings suggest that these galaxies evolved quasi-passively after an early dissipative phase and experienced radial photometric changes due to inside-out quenching. The reversal of these changes coincides with the global quenching of the galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
N. Osorio-Clavijo, O. Gonzalez-Martin, S. F. Sanchez, M. Guainazzi, I. Cruz-Gonzalez
Summary: A complete demographic of active galactic nuclei (AGNs) is necessary to understand the Universe's evolution. Optical surveys estimate AGNs' local population to be around 4%, biased towards bright sources. To complement this, X-ray emission can be used to detect AGNs not affected by host galaxy attenuation. By using Chandra's X-ray data, this study adds to the AGN population from the optical CALIFA survey, finding 34 new bona fide AGNs and 23 AGN candidates, potentially increasing the CALIFA survey's AGN population to 7-10%.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Nathan Roche, Jose M. Vilchez, Jorge Iglesias-Paramo, Polychronis Papaderos, Sebastian F. Sanchez, Carolina Kehrig, Salvador Duarte Puertas
Summary: Using PMAS Integral Field Unit, the southern component of the starburst galaxy NGC 4861, Markarian 59, was observed. The observations reveal a giant nebula and a concentration of stars with strong H a emission indicating a high star-formation rate. Spectral analysis suggests a bimodal star formation history, with Mrk 59 formed in ongoing starbursts. The emission mapping shows He II 4686 emission originating from both the central nebula and a more extended area.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Yeny Garay-Solis, Jorge K. Barrera-Ballesteros, Dario Colombo, Sebastian F. Sanchez, Alejandra Z. Lugo-Aranda, Vicente Villanueva, Tony Wong, Alberto D. Bolatto
Summary: Galactic interactions and mergers play a crucial role in galaxy evolution. Analyzing the data from 236 star-forming CALIFA galaxies, we find that interactions and mergers lead to an increase in the fraction of molecular gas in the center of galaxies compared to isolated ones. Our results suggest that the change in star formation efficiency is the main driver for the enhancement or suppression of central star formation, except in merging galaxies where the increased star formation appears to be driven by an increase in molecular gas. We propose that gravitational torques from interactions and mergers transport cold molecular gas inwards, increasing the gas fraction without necessarily increasing star formation.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Caleb Lammers, Kartheik G. Iyer, Hector Ibarra-Medel, Camilla Pacifici, Sebastian F. Sanchez, Sandro Tacchella, Joanna Woo
Summary: By comparing 279 low-redshift AGN galaxies with inactive control galaxies, researchers reconstructed nonparametric star formation histories and found that AGN feedback can suppress star formation in the central regions.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Yixian Cao, Tony Wong, Alberto D. Bolatto, Adam K. Leroy, Erik Rosolowsky, Dyas Utomo, Sebastian F. Sanchez, Jorge K. Barrera-Ballesteros, Rebecca C. Levy, Dario Colombo, Leo Blitz, Stuart N. Vogel, Johannes Puschnig, Vicente Villanueva, Monica Rubio
Summary: This article presents (CO)-C-13 (J=1->0) observations for the EDGE-CALIFA survey, detecting (CO)-C-13 in 41 galaxies via integrated line flux and in 30 galaxies via integrated line intensity. The line ratio R-12/13 is systematically compared with the properties of stars and ionized gas, with higher R-12/13 values found in interacting galaxies. The global R-12/13 slightly increases with infrared color but appears insensitive to other host-galaxy properties. The radial profiles of R-12/13 are flat across the sample and show a weak correlation with gas and stellar properties. These findings suggest that R-12/13 is not a sensitive tracer for ISM properties in complex galaxy environments.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2023)
Article
Astronomy & Astrophysics
Pablo Corcho-Caballero, Yago Ascasibar, Luca Cortese, Sebastian F. Sanchez, Angel R. Lopez-Sanchez, Amelia Fraser-McKelvie, Tayyaba Zafar
Summary: The relationship between the mechanisms that cause the rapid quenching of star-forming systems and the properties of the overall galaxy population are still difficult to determine. In this study, we investigate the physical properties of galaxies in the MaNGA and SAMI surveys at different stages of their star formation history. By comparing galaxies with recent quenching signatures to the rest of the low star-forming and active population, we find that recently quenched galaxies are compact and low-mass satellite systems with higher metallicities than their long-lived counterparts. This study emphasizes the importance of distinguishing between old and recently quenched galaxies in order to understand the mechanisms driving galaxy evolution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)