298 citations · 3.3k across the 53 of their papers we have counts for
47 papers · 1 filter
The period--luminosity relation for Mira variables in the Milky Way using Gaia DR3: a further distance anchor for
Jason L. Sanders
Gaia DR3 parallaxes are used to calibrate preliminary period--luminosity relations of O-rich Mira variables in the 2MASS , and bands using a probabilistic model accoun…
Hunting for C-rich long-period variable stars in the Milky Way's bar-bulge using unsupervised classification of Gaia BP/RP spectra
Jason L. Sanders, Noriyuki Matsunaga
The separation of oxygen- and carbon-rich AGB sources is crucial for their accurate use as local and cosmological distance and age/metallicity indicators. We investigate the use of…
A machine learning approach to photometric metallicities of giant stars
Connor P. Fallows, Jason L. Sanders
Despite the advances provided by large-scale photometric surveys, stellar features - such as metallicity - generally remain limited to spectroscopic observations often of bright, n…
Mira variables in the Milky Way's nuclear stellar disc: discovery and classification
Jason L. Sanders, Noriyuki Matsunaga, Daisuke Kawata +3
The properties of the Milky Way's nuclear stellar disc give crucial information on the epoch of bar formation. Mira variables are promising bright candidates to study the nuclear s…
The extinction law in the inner deg of the Milky Way and the red clump absolute magnitude in the inner bar-bulge
Jason L. Sanders, Leigh C. Smith, Carlos González-Fernández +2
The extinction law from to microns in the inner deg of the Milky Way is measured using data from VISTA Variables in the Via Lactea, GLIMPSE and WISE. Absol…
Simulated Bars May Be Shorter But Are Not Slower Than Observed: TNG50 vs. MaNGA
Neige Frankel, Annalisa Pillepich, Hans-Walter Rix +6
Galactic bars are prominent dynamical structures within disk galaxies whose size, formation time, strength, and pattern speed influence the dynamical evolution of their hosts galax…
Self-consistent modelling of the Milky Way's Nuclear Stellar Disc
Mattia C. Sormani, Jason L. Sanders, Tobias K. Fritz +14
The Nuclear Stellar Disc (NSD) is a flattened high-density stellar structure that dominates the gravitational field of the Milky Way at Galactocentric radius $30\lesssim R\lesssim…
Evidence for sub-Chandrasekhar Type Ia supernovae from the last major merger
Jason L. Sanders, Vasily Belokurov, Kai T. F. Man
We investigate the contribution of sub-Chandrasekhar mass Type Ia supernovae to the chemical enrichment of the Gaia Sausage galaxy, the progenitor of a significant merger event in…
Keeping it Cool: Much Orbit Migration, yet Little Heating, in the Galactic Disk
Neige Frankel, Jason Sanders, Yuan-Sen Ting +1
A star in the Milky Way's disk can now be at a Galactocentric radius quite distant from its birth radius for two reasons: either its orbit has become eccentric through radial heati…
Models of Bars with Exponential Density Profiles
D. P. McGough, N. W. Evans, J. L. Sanders
We present a new model for galactic bars with exponentially falling major axis luminosity profiles and Gaussian cross-sections. This is based on the linear superposition of Gaussia…
The total stellar halo mass of the Milky Way
Alis J. Deason, Vasily Belokurov, Jason L. Sanders
We measure the total stellar halo luminosity using red giant branch (RGB) stars selected from Gaia data release 2. Using slices in magnitude, colour and location on the sky, we dec…
The Inside-out Growth of the Galactic Disk
Neige Frankel, Jason Sanders, Hans-Walter Rix +2
We quantify the inside-out growth of the Milky Way's low-alpha stellar disk, modelling the ages, metallicities and Galactocentric radii of APOGEE red clump stars with 6 < R < 13 kp…
The Biggest Splash
Vasily Belokurov, Jason L. Sanders, Azadeh Fattahi +4
Using a large sample of bright nearby stars with accurate Gaia Data Release 2 astrometry and auxiliary spectroscopy we map out the properties of the principle Galactic components s…
Transverse kinematics of the Galactic bar-bulge from VVV and Gaia
Jason L. Sanders, Leigh Smith, N. Wyn Evans +1
We analyse the kinematics of the Galactic bar-bulge using proper motions from the ESO public survey Vista Variables in the Via Lactea (VVV) and the second Gaia data release. Gaia h…
The pattern speed of the Milky Way bar from transverse velocities
Jason L. Sanders, Leigh Smith, N. Wyn Evans
We use the continuity equation to derive a method for measuring the pattern speed of the Milky Way's bar/bulge from proper motion data. The method has minimal assumptions but requi…
The hidden giant: discovery of an enormous Galactic dwarf satellite in Gaia DR2
G. Torrealba, V. Belokurov, S. E. Koposov +8
We report the discovery of a Milky Way satellite in the constellation of Antlia. The Antlia 2 dwarf galaxy is located behind the Galactic disc at a latitude of a…
The Sausage Globular Clusters
G. C. Myeong, N. W. Evans, V. Belokurov +2
The Gaia Sausage is an elongated structure in velocity space discovered by Belokurov et al. (2018) using the kinematics of metal-rich halo stars. It was created by a massive dwarf…
Isochrone ages for ~3 million stars with the second Gaia data release
Jason L. Sanders, Payel Das
We present a catalogue of distances, masses and ages for million stars in the second Gaia data release with spectroscopic parameters available from the large spectroscopic…
A two-parameter family of double-power-law biorthonormal potential-density expansions
E. J. Lilley, J. L. Sanders, N. W. Evans
Biorthonormal basis function expansions are widely used in galactic dynamics, both to study problems in galactic stability and to provide numerical algorithms to evolve collisionle…
MADE: A spectroscopic Mass, Age, and Distance Estimator for red giant stars with Bayesian machine learning
Payel Das, Jason Sanders
We present a new approach (MADE) that generates mass, age, and distance estimates of red giant stars from a combination of astrometric, photometric, and spectroscopic data. The cor…
The Shards of Centauri
G. C. Myeong, N. W. Evans, V. Belokurov +2
We use the SDSS-Gaia catalogue to search for substructure in the stellar halo. The sample comprises 62\,133 halo stars with full phase space coordinates and extends out to heliocen…
The Milky Way Halo in Action Space
G. C. Myeong, N. W. Evans, V. Belokurov +2
We analyse the structure of the local stellar halo of the Milky Way using 60000 stars with full phase space coordinates extracted from the SDSS--{\it Gaia} catalogue. We dis…
Tidal disruption of dwarf spheroidal galaxies: the strange case of Crater II
Jason L. Sanders, N. Wyn Evans, Walter Dehnen
Dwarf spheroidal galaxies of the Local Group obey a relationship between the line-of-sight velocity dispersion and half-light radius, although there are a number of dwarfs that lie…
Galaxy halo expansions: a new biorthogonal family of potential-density pairs
E. J. Lilley, J. L. Sanders, N. W. Evans +1
Efficient expansions of the gravitational field of (dark) haloes have two main uses in the modelling of galaxies: first, they provide a compact representation of numerically-constr…