Isolated Galaxies versus Interacting Pairs with MaNGA by María del Carmen Argudo Fernández, Fangting Yuan, Shiyin Shen, Jun Yin, Ruixiang Chang, Shuai Feng

“…We find that the central part of the isolated galaxy is composed by older stellar population (~2 Gyr) than in the outskirts (~7 Gyr). …”
Get full text

Dominant dark matter and a counter rotating disc: MUSE view of the low luminosity S0 galaxy NGC 5102 by Mitzkus, M, Cappellari, M, Walcher, C

“…<p>The kinematics and stellar populations of the low-mass nearby S0 galaxy NGC 5102 are studied from integral field spectra taken with the Multi-Unit Spectroscopic Explorer. …”

Improved dynamical constraints on the mass of the central black hole in NGC 404 by Nguyen, D, Seth, A, den Brok, M, Neumayer, N, Cappellari, M, Barth, A, Caldwell, N, Williams, B, Binder, B

“…We then redetermine the dynamical black hole mass in NGC 404 including modeling of the nuclear stellar populations. We combine HST/STIS spectroscopy with WFC3 images to create a local color-M/L relation derived from stellar population modeling of the STIS data. …”

Nuclear Properties of Nearby Spiral Galaxies from Hubble Space Telescope NICMOS imaging and STIS Spectroscopy by Hughes, M, Axon, D, Atkinson, J, Alonso-Herrero, A, Scarlata, C, Marconi, A, Batcheldor, D, Binney, J, Capetti, A, Carollo, C, Dressel, L, Gerssen, J, Macchetto, D, Maciejewski, W, Merrifield, M, Ruiz, M, Sparks, W, Stiavelli, M, Tsvetanov, Z

“…Using R-H and J-H colors and equivalent widths of H-alpha emission (from the STIS spectra) we investigate the nature of the stellar population with evolutionary models. Under the assumption of hot stars ionizing the gas, as opposed to a weak AGN, we find that there are young stellar populations (~10-20 Myr) however these data do not allow us to determine what percentage of the total nuclear stellar population they form. …”

Rejuvenation of spiral bulges by Thomas, D, Davies, R

“…We seek to understand whether the stellar populations of galactic bulges show fingerprints of secular evolution triggered by the presence of the disc. …”

Far-ultraviolet to Far-infrared Spectral Energy Distribution Modeling of the Star Formation History across M31 by Denis A. Leahy, Jakob Hansen, Andrew M. Hopkins

“…The SEDs are modeled using the Cigale SED fitting code with old and young stellar populations. The old stellar population has an age of 12 Gyr across M31 but has longer formation times at further distances from the center. …”
Get full text

Nuclear properties of nearby spiral galaxies from Hubble Space Telescope NICMOS imaging and STIS spectroscopy by Hughes, M, Axon, D, Atkinson, J, Alonso-Herrero, A, Scarlata, C, Marconi, A, Batcheldor, D, Binney, J, Capetti, A, Carollo, C, Dressel, L, Gerssen, J, Macchetto, D, Maciejewski, W, Merrifield, M, Ruiz, M, Sparks, W, Stiavelli, M, Tsvetanov, Z

“…Using R - H and J - H colors and equivalent widths of Hα emission (from the STIS spectra), we investigate the nature of the stellar population with evolutionary models. Under the assumption of hot stars ionizing the gas, as opposed to a weak active galactic nucleus (AGN), we find that there are young stellar populations (∼ 10-20 Myr); however, these data do not allow us to determine what percentage of the total nuclear stellar population they form. …”

Probing the nature of the G1 clump stellar overdensity in the outskirts of M31 by Faria, D, Johnson, R, Ferguson, AMN, Irwin, M, Ibata, R, Johnston, K, Lewis, G, Tanvir, N

“…We discuss the nature of the G1 clump in light of these new stellar population constraints and argue that the combination of stellar content and physical size make it unlikely that the structure is the remnant of an accreted dwarf galaxy. …”

The kinematics and morphology of the H-I in gas-poor galaxies by Oosterloo, T, Morganti, R, de Zeeuw, P, McDermid, R, Krajnovic, D, Cappellari, M, Kenn, F, Weijmans, A, Sarzi, M

“…We do not find a trend between the presence of Hi and the global age of the stellar population or with the global dynamical characteristics of the galaxies. …”

A z = 1.82 analog of local ultra-massive elliptical galaxies by Onodera, M, Daddi, E, Gobat, R, Cappellari, M, Arimoto, N, Renzini, A, Yamada, Y, McCracken, H, Mancini, C, Capak, P, Carollo, M, Cimatti, A, Giavalisco, M, Ilbert, O, Kong, X, Lilly, S, Motohara, K, Ohta, K, Sanders, D, Scoville, N, Tamura, N, Taniguchi, Y

“…We present observations of a very massive galaxy at z = 1.82 that show that its morphology, size, velocity dispersion, and stellar population properties are fully consistent with those expected for passively evolving progenitors of today's giant ellipticals. …”

The SWELLS survey - IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy by Barnabè, M, Dutton, A, Marshall, P, Auger, M, Brewer, B, Treu, T, Bolton, A, Koo, D, Koopmans, L

“…Comparing the tightly constrained gravitational stellar mass inferred from the combined analysis with that inferred from stellar population modelling of the galaxies' colours, and accounting for an expected cold gas fraction of 20 ± 10 per cent, we determine a preference for a Chabrier IMF over Salpeter IMF by a Bayes factor of 5.7 (corresponding to substantial evidence). …”

MRC B1221-423: a compact steep-spectrum radio source in a merging galaxy by Johnston, H, Hunstead, R, Cotter, G, Sadler, E

“…We analyse the images of the galaxy and its companion pixel-by-pixel, first using colour-magnitude diagrams and then fitting stellar population models to the spectral energy distributions (SEDs) of each pixel. …”

NGC 1266 AS A LOCAL CANDIDATE FOR RAPID CESSATION OF STAR FORMATION by Alatalo, K, Nyland, K, Graves, G, Deustua, S, Griffin, K, Duc, P, Cappellari, M, McDermid, R, Davis, T, Crocker, A, Young, L, Chang, P, Scott, N, Cales, S, Bayet, E, Blitz, L, Bois, M, Bournaud, F, Bureau, M, Davies, R, de Zeeuw, P, Emsellem, E, Khochfar, S, Krajnovic, D, Kuntschner, H

“…Both the SAURON maps of stellar population age and the Swift UVOT observations demonstrate the presence of young (&lt;1 Gyr) stellar populations within the central 1 kpc, while existing Combined Array for Research in Millimeter-Wave Astronomy CO(1-0) maps indicate that the sites of current star formation are constrained to only the inner few hundred parsecs of the galaxy. …”

Gamma-ray emission from early-type stars interacting with AGN jets by Araudo Anabella T., Bosch-Ramon Valentí, Romero Gustavo E.

“…This radiation may be significant, and its detection might yield information on the properties of the stellar population in the galaxy nucleus, as well as on the relativistic jet. …”
Get full text

Recent progress in the theoretical modelling of Cepheids and RR Lyrae stars by Marconi Marcella

“…Cepheids and RR Lyrae are among the most important primary distance indicators to calibrate the extragalactic distance ladder and excellent stellar population tracers, for Population I and Population II, respectively. …”
Get full text

The Age Distribution of Stellar Orbit Space Clumps by Verena Fürnkranz, Hans-Walter Rix, Johanna Coronado, Rhys Seeburger

“…Here, we develop and illustrate a new approach that can estimate robust stellar population ages for such groups of stars. This first entails projecting the predetermined action-angle distribution into the 5D space of positions, parallaxes, and proper motions, where much larger samples of likely members can be identified over a much wider range of the CMD. …”
Get full text

A DEEPER LOOK AT LEO IV: STAR FORMATION HISTORY AND EXTENDED STRUCTURE by Sand, David J., Seth, Anil, Olszewski, Edward W., Willman, Beth, Zaritsky, Dennis, Kallivayalil, Nitya

“…Studying both the spatial distribution and frequency of Leo IV's "blue plume" stars reveals evidence for a young (~2 Gyr) stellar population which makes up ~2% of its stellar mass. …”
Get full text

The SAURON project - XXI. The spatially resolved UV-line strength relations of early-type galaxies by Jeong, H, Yi, S, Bureau, M, Davies, R, Bacon, R, Cappellari, M, de Zeeuw, P, Emsellem, E, Falcon-Barroso, J, Krajnovic, D, Kuntschner, H, McDermid, R, Peletier, R, Sarzi, M, van den Bosch, R, van de Ven, G

“…We have also derived logarithmic internal radial colour, measured line strength and derived stellar population gradients for each galaxy and again found a strong dependence of the FUV -V and FUV - NUV colour gradients on both the Mgb line strength and the metallicity gradients for galaxies with old stellar populations. …”

Simulating supermassive black hole mass measurements for a sample of ultramassive galaxies using ELT/HARMONI high-spatial-resolution integral-field stellar kinematics by Nguyen, DD, Cappellari, M, Pereira-Santaella, M

“…As the earliest relics of star formation episodes of the Universe, the most massive galaxies are the key to our understanding of the stellar population, cosmic structure, and supermassive black hole (SMBH) evolution. …”

Astronomical Data Resources for Binary and Multiple Stars by Kovaleva D.

“…Binary stars form a significant part of stellar population. They are registered and observed by a number of methods. …”
Get full text