172 citations · 1.1k across the 30 of their papers we have counts for
28 papers · 1 filter
Uncovering the origin of complex velocity distributions in edge-on disc galaxies
Sophie Townson, Marie Martig, Robert J. J. Grand +3
Stellar line-of-sight velocity distributions are a powerful tool for studying galaxy kinematics and formation history, with multiple-peaked LOSVDs often indicating the presence of…
Semiresolved Stellar Populations as Distance Indicators
Ignacio Martín-Navarro, Patricia Iglesias Navarro, Francesco La Barbera +13
Galaxy distances are central to our understanding of the Universe. Despite the success of existing approaches, independent and complementary methods remain valuable for testing sys…
FASTAR -- II. Semi-resolved evolutionary stellar population models
Ignacio Martín-Navarro, Alexandre Vazdekis, Luis Peralta de Arriba +12
Standard evolutionary synthesis models rely on the assumption of a fully sampled stellar initial mass function (IMF). Under this assumption, the age, chemical composition, and IMF…
FASTAR -- I. Continuous and differentiable evolutionary stellar population models
Ignacio Martín-Navarro, Alexandre Vazdekis, Luis Peralta de Arriba +11
The development of evolutionary stellar population models is central to interpreting observations of galaxies in terms of astrophysical quantities. Stellar population models must t…
Tracing the dynamical and structural complexity of spiral galaxy centres
Iris Breda, Glenn van de Ven, Sabine Thater +7
The formation of late-type galaxies has traditionally been described via two pathways: one producing pressure-supported classical bulges, the other rotationally supported pseudo-bu…
Glance: A Comprehensive Framework for Galactic Archaeology
Iris Breda, Glenn van de Ven, Sabine Thater +8
A central topic in extragalactic astronomy is understanding the formation and evolutionary histories of galaxies. These systems often comprise multiple structural components with d…
Orbital decomposition of the nuclear regions in the early-type galaxy FCC 47: Unveiling the nuclear cluster origin
Julia Lamprecht, Anja Feldmeier-Krause, Mariya Lyubenova +8
Nuclear star clusters (NSCs) are among the densest stellar systems in the Universe and often coexist with supermassive black holes (SMBHs) at galaxy centres. While SMBH formation h…
3D Full Spectrum Fitting: Algorithm Comparison
Prashin Jethwa, Simon Hubmer, Ronny Ramlau +1
Full spectrum fitting is the prevailing method for extracting stellar kinematic and population measurements from 1D galaxy spectra. 3D methods refer to analysis of Integral Field S…
Large-Scale Stellar Age-Velocity Spiral Pattern in NGC 4030
Iris Breda, Glenn van de Ven, Sabine Thater +11
The processes driving the formation and evolution of late-type galaxies (LTGs) continue to be a debated subject in extragalactic astronomy. Investigating stellar kinematics, especi…
Isotopic abundance of carbon in the DLA towards QSO B1331+170
Dinko Milaković, John K. Webb, Paolo Molaro +19
Chemical evolution models predict a gradual build-up of C in the universe, based on empirical nuclear reaction rates and assumptions on the properties of stellar populations…
Schwarzschild Modeling of Barred S0 Galaxy NGC 4371
Behzad Tahmasebzadeh, Ling Zhu, Juntai Shen +15
We apply the barred Schwarzschild method developed by Tahmasebzadeh et al. (2022) to a barred S0 galaxy, NGC 4371, observed by IFU instruments from the TIMER and ATLAS3D projects.…
Dynamical modelling of ATLAS galaxies
Sabine Thater, Prashin Jethwa, Edward J. Lilley +3
Triaxial dynamical models of massive galaxies observed in the ATLAS3D project can provide new insights into the complex evolutionary processes that shape galaxies. The ATLAS3D surv…
Effect of the initial mass function on the dynamical SMBH mass estimate in the nucleated early-type galaxy FCC 47
Sabine Thater, Mariya Lyubenova, Katja Fahrion +4
Supermassive black holes (SMBHs) and nuclear star clusters (NSCs) co-exist in many galaxies. While the formation history of the black hole is essentially lost, NSCs preserve their…
Uncertainty-Aware Blob Detection with an Application to Integrated-Light Stellar Population Recoveries
Fabian Parzer, Prashin Jethwa, Alina Boecker +3
Context. Blob detection is a common problem in astronomy. One example is in stellar population modelling, where the distribution of stellar ages and metallicities in a galaxy is in…
On the robustness of triaxial Schwarzschild modelling: The effects of correcting the orbit mirroring
Sabine Thater, Prashin Jethwa, Behzad Tahmasebzadeh +13
In the past 15 years, the triaxial Schwarzschild orbit-superposition code by van den Bosch et al. (2008) has been widely applied to study the dynamics of galaxies. Recently, Quenne…
What to expect when using globular clusters as tracers of the total mass distribution in Milky Way-mass galaxies
Meghan E. Hughes, Prashin Jethwa, Michael Hilker +8
Dynamical models allow us to connect the motion of a set of tracers to the underlying gravitational potential, and thus to the total (luminous and dark) matter distribution. They a…
Disentangling the formation history of galaxies via population-orbit superposition: method validation
Ling Zhu, Glenn van de Ven, Ryan Leaman +9
We present population-orbit superposition models for external galaxies based on Schwarzschild's orbit-superposition method, by tagging the orbits with age and metallicity. The mode…
Two Ultra-Faint Milky Way Stellar Systems Discovered in Early Data from the DECam Local Volume Exploration Survey
S. Mau, W. Cerny, A. B. Pace +56
We report the discovery of two ultra-faint stellar systems found in early data from the DECam Local Volume Exploration survey (DELVE). The first system, Centaurus I (DELVE J1238-40…
The Pisces Plume and the Magellanic Wake
Vasily Belokurov, Alis J. Deason, Denis Erkal +5
Using RR Lyrae stars in the Gaia Data Release 2 and Pan-STARRS1 we study the properties of the Pisces Overdensity, a diffuse sub-structure in the outer halo of the Milky Way. We sh…
A faint halo star cluster discovered in the Blanco Imaging of the Southern Sky Survey
S. Mau, A. Drlica-Wagner, K. Bechtol +13
We present the discovery of a faint, resolved stellar system, BLISS J0321+0438 (BLISS 1), found in Dark Energy Camera data from the first observing run of the Blanco Imaging of the…
Stellar streams around the Magellanic Clouds in 4D
Camila Navarrete, Vasily Belokurov, Márcio Catelan +7
We carried out a spectroscopic follow-up program of the four new stellar stream candidates detected by Belokurov & Koposov (2016) in the outskirts of the Large Magellanic Cloud (LM…
Snake in the Clouds: A new nearby dwarf galaxy in the Magellanic bridge
Sergey E. Koposov, Matthew G. Walker, Vasily Belokurov +9
We report the discovery of a nearby dwarf galaxy in the constellation of Hydrus, between the Large and the Small Magellanic Clouds. Hydrus 1 is a mildy elliptical ultra-faint syste…
Ships Passing in the Night: Spectroscopic Analysis of Two Ultra-Faint Satellites in the Constellation Carina
T. S. Li, J. D. Simon, A. B. Pace +21
We present Magellan/IMACS, Anglo-Australian Telescope/AAOmega+2dF, and Very Large Telescope/GIRAFFE+FLAMES spectroscopy of the CarinaII (Car II) & Carina III (Car III) dwarf galaxy…
Discovery of a thin stellar stream in the SLAMS survey
P. Jethwa, G. Torrealba, C. Navarrete +8
We report the discovery of a thin stellar stream - which we name the Jet stream - crossing the constellations of Hydra and Pyxis. The discovery was made in data from the SLAMS surv…