A5018056816- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- Geophysics and Gravity Measurements
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
Shanghai Astronomical Observatory
2023-2024
Centro de Astrobiología
2023
National Astronomical Observatories
2017-2020
Chinese Academy of Sciences
2017-2020
University of Chinese Academy of Sciences
2019
We evaluate the capabilities of Schwarzschild's orbit-superposition method by applying it to galaxies from large scale, high resolution Illustris simulation. Nine early-type with a range triaxiality are selected, and we create mock integral field unit data for five line-of-sight projections each galaxy. Each 45 sets is taken as an independent observed Using van den Bosch's 2008 triaxial Schwarzschild implementation, assess model estimates various galaxy properties, covering mass profiles,...
Abstract We use the stellar kinematics for 2458 galaxies from MaNGA survey to explore a universal fundamental plane (UFP) described by equation <?CDATA $\mathrm{log}({{\rm{\Upsilon }}}_{e})=\mathrm{log}({S}_{0.5}^{2})-\mathrm{log}({I}_{e})-\mathrm{log}({R}_{e})+C$?> , defined logarithms of effective radius, R e ; surface brightness within Re, I dynamical mass-to-light ratio Y and total velocity parameter at ${S}_{K}^{2}={{KV}}_{{R}_{e}}^{2}+{\sigma }_{{\star }_{e}}^{2}$?> where...
In our earlier 2019 paper, we evaluated the reliability of Schwarzschild's orbit-superposition dynamical modelling method in estimating internal mass distribution, intrinsic stellar shapes and orbit distributions early-type galaxies (ETGs) taken from Illustris cosmological simulation. We now apply same techniques to integral-field survey Mapping Nearby Galaxies with APO (MaNGA), using a sample 149 ETGs range $10^{9.90}\sim10^{11.80} M_{\odot}$ made up 105 central 44 satellite galaxies. find...
Abstract We apply the barred Schwarzschild method developed by Tahmasebzadeh et al. (2022) to a S0 galaxy, NGC 4371, observed IFU instruments from TIMER and ATLAS3D projects. construct gravitational potential combining fixed black hole mass, spherical dark matter halo, stellar mass distribution deprojected 3.6 μm S4G image considering an axisymmetric disk triaxial bar. independently modelled kinematic data ATLAS3D. Both models fit remarkably well. find consistent bar pattern speed two sets...
We employ a recently developed population-orbit superposition technique to simultaneously fit the stellar kinematic and age maps of 82 CALIFA spiral galaxies obtain ages stars in different dynamical structures. first evaluated capabilities this method on CALIFA-like mock data created from Auriga simulations. The recovered mean dynamically cold, warm, hot components match true values well, with an observational error up 20% maps. For galaxies, we find that all increase mass t cold ~ 2.2 Gyr,...
We employ a recently developed population-orbit superposition technique to simultaneously fit the stellar kinematic and age maps of 82 CALIFA spiral galaxies obtain ages stars in different dynamical structures. first evaluated capabilities this method on CALIFA-like mock data created from Auriga simulations. The recovered mean dynamically cold, warm, hot components match true values well, with an observational error up $20\%$ maps. For galaxies, we find that all increase mass...
We use the stellar kinematics for $2458$ galaxies from MaNGA survey to explore dynamical scaling relations between mass $M_{\star}$ and total velocity parameter at effective radius, $R_e$, defined as $S_{K}^{2}=KV_{R_e}^{2}+σ_{\star_e}^{2}$, which combines rotation $V_{R_e}$, dispersion $σ_{\star_e}$. confirm that spheroidal spiral follow same $M_{\star}-S_{0.5}$ relation with lower scatter than $M_{\star}-V_{R_e}$ $M_{\star}-σ_{\star_e}$ ones. also a more general Universal Fundamental Plane...
Galaxy formation entails the hierarchical assembly of mass, along with condensation baryons and ensuing, self-regulating star formation. The stars form a collisionless system whose orbit distribution retains dynamical memory that can constrain galaxy's history. ordered-rotation dominated orbits near maximum circularity $\lambda_z \simeq1$ random-motion low \simeq0$ are called kinematically cold hot, respectively. fraction on `cold' orbits, compared to `hot' speaks directly quiescence or...
We apply the barred Schwarzschild method developed by Tahmasebzadeh et al. (2022) to a S0 galaxy, NGC 4371, observed IFU instruments from TIMER and ATLAS3D projects. construct gravitational potential combining fixed black hole mass, spherical dark matter halo, stellar mass distribution deprojected $3.6$ $\mu$m S$^4$G image considering an axisymmetric disk triaxial bar. create two sets of independent models, fitting kinematic data derived ATLAS3D, separately. The models fit all remarkably...