Research Repository

See what's under the surface


Tidal interactions and mergers in intermediate redshift EDisCS clusters (2018)
Journal Article
Deger, S., Rudnick, G., Kelkar, K., Aragón-Salamanca, A., Desai, V., Lotz, J. M., …Zaritsky, D. (2018). Tidal interactions and mergers in intermediate redshift EDisCS clusters. Astrophysical Journal, 869(1), doi:10.3847/1538-4357/aaeb87

We study the fraction of tidal interactions and mergers with well identified observability timescales (fTIM) in group, cluster, and accompanying field galaxies and its dependence on redshift (z), cluster velocity dispersion (sigma) and environment an... Read More

A direct test of density wave theory in a grand design spiral galaxy (2018)
Journal Article
Peterken, T. G., Merrifield, M. R., Aragón-Salamanca, A., Drory, N., Krawczyk, C. M., Masters, K. L., …Westfall, K. B. (2018). A direct test of density wave theory in a grand design spiral galaxy. Nature Astronomy, doi:10.1038/s41550-018-0627-5

The exact nature of the arms of spiral galaxies is still an open question1. It has been widely assumed that spiral arms in galaxies with two distinct symmetrical arms are the products of density waves that propagate around the disk, with the spiral a... Read More

SDSS-IV MaNGA: the formation of S0 galaxies (2018)
Journal Article
Fraser-McKelvie, A., Aragon-Salamanca, A., Merrifield, M., Tabor, M., Bernardi, M., Drory, N., …Argudo-Fernandez, M. (2018). SDSS-IV MaNGA: the formation of S0 galaxies. Monthly Notices of the Royal Astronomical Society, 481(4), (5580–5591). doi:10.1093/mnras/sty2563. ISSN 0035-8711

Gas stripping of spiral galaxies or mergers are thought to be the formation mechanisms of lenticular galaxies. In order to determine the conditions in which each scenario dominates, we derive stellar populations of both the bulge and disk regions of... Read More

SDSS-IV MaNGA: uncovering the angular momentum content of central and satellite early-type galaxies (2018)
Journal Article
Greene, J., Leauthaud, A., Emsellem, E., Ge, J., Aragón-Salamanca, A., Greco, J., …van den Bosch, F. (2018). SDSS-IV MaNGA: uncovering the angular momentum content of central and satellite early-type galaxies. Astrophysical Journal, 852(1), doi:10.3847/1538-4357/aa9bde. ISSN 0004-637X

We study 379 central and 159 satellite early-type galaxies with two-dimensional kinematics from the integral field survey Mapping Nearby Galaxies at APO (MaNGA) to determine how their angular momentum content depends on stellar and halo mass. Using t... Read More

Sloan Digital Sky Survey IV: mapping the Milky Way, nearby galaxies, and the distant universe (2017)
Journal Article
Blanton, M. R., Bershady, M. A., Abolfathi, B., Albareti, F. D., Prieto, C. A., Almeida, A., …Merrifield, M. R. (2017). Sloan Digital Sky Survey IV: mapping the Milky Way, nearby galaxies, and the distant universe. Astronomical Journal, 154(1), doi:10.3847/1538-3881/aa7567

We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high re... Read More