Astrophysics at the University of Hull

2D-Galactic chemical evolution: The role of the spiral density wave (2019)
Journal Article
Mollá, M., Wekesa, S., Cavichia, O., Díaz, I., Gibson, B. K., Rosales-Ortega, F. F., Ascasibar, Y., Wamalwa, D. S., & Sánchez, S. F. (2019). 2D-Galactic chemical evolution: The role of the spiral density wave. Monthly notices of the Royal Astronomical Society, 490(1), 665-682. https://doi.org/10.1093/mnras/stz2537

© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We present a 2D chemical evolution code applied to a Milky Way type Galaxy, incorporating the role of spiral arms in shaping azimuthal abundance v... Read More about 2D-Galactic chemical evolution: The role of the spiral density wave.

Heterogeneity of inverted calcium II H:K ratio cluster galaxies (2019)
Journal Article
Pimbblet, K. A., Crossett, J. P., & Fraser-McKelvie, A. (2019). Heterogeneity of inverted calcium II H:K ratio cluster galaxies. Monthly notices of the Royal Astronomical Society, 490(1), 455-466. https://doi.org/10.1093/mnras/stz2549

© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society The ratio of calcium II H plus H∊ to calcium II K inverts as a galaxy stellar population moves from being dominated by older stars to possessing mor... Read More about Heterogeneity of inverted calcium II H:K ratio cluster galaxies.

A direct measurement of the 17O(α,γ)21Ne reaction in inverse kinematics and its impact on heavy element production (2019)
Journal Article
Taggart, M. P., Akers, C., Laird, A. M., Hager, U., Ruiz, C., Hutcheon, D. A., Bentley, M. A., Brown, J. R., Buchmann, L., Chen, A. A., Chen, J., Chipps, K. A., Choplin, A., D'Auria, J. M., Davids, B., Davis, C., Diget, C. A., Erikson, L., Fallis, J., Fox, S. P., …Williams, M. (2019). A direct measurement of the 17O(α,γ)21Ne reaction in inverse kinematics and its impact on heavy element production. Physics letters. B, 798, Article 134894. https://doi.org/10.1016/j.physletb.2019.134894

© 2019 The Authors During the slow neutron capture process in massive stars, reactions on light elements can both produce and absorb neutrons thereby influencing the final heavy element abundances. At low metallicities, the high neutron capture rate... Read More about A direct measurement of the 17O(α,γ)21Ne reaction in inverse kinematics and its impact on heavy element production.

Redshift measurement through star formation (2019)
Journal Article
Lindholmer, M. O., & Pimbblet, K. A. (2019). Redshift measurement through star formation. Astronomy and Astrophysics, 629, Article A7. https://doi.org/10.1051/0004-6361/201833046

© ESO 2019. In this work we use the property that, on average, star formation rate increases with redshift for objects with the same mass - the so called galaxy main sequence - to measure the redshift of galaxy clusters. We use the fact that the gene... Read More about Redshift measurement through star formation.

NuGrid stellar data set - III. Updated low-mass AGB models and s-process nucleosynthesis with metallicities Z = 0.01, Z = 0.02, and Z = 0.03 (2019)
Journal Article
Battino, U., Tattersall, A., Lederer-Woods, C., Herwig, F., Denissenkov, P., Hirschi, R., Trappitsch, R., den Hartogh, J. W., & Pignatari, M. (2019). NuGrid stellar data set - III. Updated low-mass AGB models and s-process nucleosynthesis with metallicities Z = 0.01, Z = 0.02, and Z = 0.03. Monthly notices of the Royal Astronomical Society, 489(1), 1082-1098. https://doi.org/10.1093/mnras/stz2158

© 2019 Oxford University Press. All rights reserved. The production of the neutron-capture isotopes beyond iron that we observe today in the Solar system is the result of the combined contribution of the r-process, the s-process, and possibly the i-p... Read More about NuGrid stellar data set - III. Updated low-mass AGB models and s-process nucleosynthesis with metallicities Z = 0.01, Z = 0.02, and Z = 0.03.

Extended X-ray study of M49: The frontier of the Virgo cluster (2019)
Journal Article
Su, Y., Kraft, R. P., Nulsen, P. E. J., Jones, C., Maccarone, T. J., Mernier, F., Lovisari, L., Sheardown, A., Randall, S. W., Roediger, E., Fish, T. M., Forman, W. R., & Churazov, E. (2019). Extended X-ray study of M49: The frontier of the Virgo cluster. Astronomical Journal, 158(1), Article 6. https://doi.org/10.3847/1538-3881/ab1d51

The M49 group, residing outside the virial radius of the Virgo cluster, is falling onto the cluster from the south. We report results from deep XMM-Newton mosaic observations of M49. Its hot gas temperature is 0.8 keV at the group center and rises to... Read More about Extended X-ray study of M49: The frontier of the Virgo cluster.

Using failed supernovae to constrain the Galactic r-process element production (2019)
Journal Article
Wehmeyer, B., Wehmeyer, B., Fröhlich, C., Fröhlich, C., Côté, B., Côté, B., Pignatari, M., Pignatari, M., Thielemann, F.-K., & Thielemann, F. K. (2019). Using failed supernovae to constrain the Galactic r-process element production. Monthly notices of the Royal Astronomical Society, 487(2), 1745-1753. https://doi.org/10.1093/mnras/stz1310

Rapid neutron capture process (r-process) elements have been detected in a large fraction of metal-poor halo stars, with abundances relative to iron (Fe) that vary by over two orders of magnitude. This scatter is reduced to less than a factor of 3 in... Read More about Using failed supernovae to constrain the Galactic r-process element production.

Neutron star mergers might not be the only source of r-process elements in the Milky Way (2019)
Journal Article
Côté, B., Eichler, M., Arcones, A., Hansen, C. J., Simonetti, P., Frebel, A., Fryer, C. L., Pignatari, M., Reichert, M., Belczynski, K., & Matteucci, F. (2019). Neutron star mergers might not be the only source of r-process elements in the Milky Way. The Astrophysical journal, 875(2), 106. https://doi.org/10.3847/1538-4357/ab10db

Probing the origin of r-process elements in the universe represents a multidisciplinary challenge. We review the observational evidence that probes the properties of r-process sites, and address them using galactic chemical evolution simulations, bin... Read More about Neutron star mergers might not be the only source of r-process elements in the Milky Way.

Evolution of the stellar mass function and infrared luminosity function of galaxies since z = 1.2 (2019)
Journal Article
Beare, R., Brown, M. J., Pimbblet, K., & Taylor, E. N. (2019). Evolution of the stellar mass function and infrared luminosity function of galaxies since z = 1.2. The Astrophysical journal, 873(1), Article 78. https://doi.org/10.3847/1538-4357/ab041a

© 2019. The American Astronomical Society. All rights reserved. We measured evolution of the K-band luminosity function and stellar mass function (SMF) for red and blue galaxies at z < 1.2 using a sample of 353 594 I < 24 galaxies in 8.26 square degr... Read More about Evolution of the stellar mass function and infrared luminosity function of galaxies since z = 1.2.

Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster - a post-merger scenario (2019)
Journal Article
Lyskova, N., Churazov, E., Zhang, C., Forman, W., Jones, C., Dolag, K., Roediger, E., & Sheardown, A. (2019). Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster - a post-merger scenario. Monthly notices of the Royal Astronomical Society, 485(2), 2922-2934. https://doi.org/10.1093/mnras/stz597

We study a merger of the NGC 4839 group with the Coma cluster using X-ray observations from the XMM–Newton and Chandra telescopes. X-ray data show two prominent features: (i) a long (∼600 kpc in projection) and bent tail of cool gas trailing (towards... Read More about Close-up view of an ongoing merger between the NGC 4839 group and the Coma cluster - a post-merger scenario.