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jhunt2021.yml
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jhunt2021.yml
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title: JHunt 2021
index: jhunt2021
visible: false
descr: >
<p>The simulations presented here are Models D1, D2, M1 and M2 from Hunt et al. (2021). They are freely available, but please cite Hunt et al. (2021) if you use them! Currently available are the snapshots presented in the paper, but we intend to make the full time evolution available (at 9.77 Myr intervals) available shortly.</p>
<p>For the dark matter particles we provide x, y, z (kpc), v_x, v_y, v_z (km/s), mass (Solar mass), and particle ID. For the stellar particles, we provide as above, but also include actions, angles and frequencies derived with Agama (<a class="underline" target="_blank" rel="noopener" href="https://ui.adsabs.harvard.edu/abs/2019MNRAS.482.1525V/abstract">Vasiliev 2019</a>): J_R, J_phi, J_z (kpc km/s), theta_R, theta_phi, theta_z (radians) and Omega_R, Omega_phi, Omega_z (km/s /kpc).</p>
<p>Model D1 is an isolated Milky Way like disc galaxy based on Model MWb from <a class="underline" target="_blank" rel="noopener" href="https://ui.adsabs.harvard.edu/abs/2005ApJ...631..838W/abstract">Widrow & Dubinski (2005)</a>. It remains stable against bar and spiral formation for several Gyr. We present snapshot 200 on Flathub for comparison with the merger model M1 as an example of the un-perturbed galaxy.</p>
<p>Model D2 is an isolated disc galaxy based on Model MWa from <a class="underline" target="_blank" rel="noopener" href="https://ui.adsabs.harvard.edu/abs/2005ApJ...631..838W/abstract">Widrow & Dubinski (2005)</a>. It forms a bar and transient spiral structure. We present snapshot 549 on Flathub for comparison with the merger model M2 as an example of the un-perturbed galaxy.</p>
<p>Model M1 is the merger of the L2 dwarf galaxy from <a class="underline" target="_blank" rel="noopener" href="https://ui.adsabs.harvard.edu/abs/2018MNRAS.481..286L/abstract">Laporte et al. (2018)</a> into Model D1. This is an excellent test case for the structure and kinematics induced by the merger, as the disc otherwise remains stable. We present step 702 on Flathub as the `present day’ snapshot, where the dwarf is closest to the location of Sgr in the Milky Way.</p>
<p>Model M2 is the merger of the L2 dwarf galaxy from <a class="underline" target="_blank" rel="noopener" href="https://ui.adsabs.harvard.edu/abs/2018MNRAS.481..286L/abstract">Laporte et al. (2018)</a> into Model D2. This is a violent merger which creates a thick disc and inner halo from the dwarf remnant. We present snapshot 557 on Flathub as the ‘final’ state of the system.</p>
<p>Note that these models are not intended to be accurate reproductions of the Milky Way - Sgr system, merely test cases for the dynamical processes involved in Disc-dwarf mergers. See Bennet, Bovy & Hunt (2021) for our attempts to better match observations of the Milky Way - Sagittarius dwarf galaxy merger.</p>
count: 4686066326
settings:
index:
number_of_shards: 32
key:
- model
- ID # bug in D1-stellar
- z # iffy
fields:
- name: model
type: byte
flag: required
enum:
- M1-dark
- M1-stellar
- M2-dark
- M2-stellar
- D1-dark
- D1-stellar
- D2-dark
- D2-stellar
- name: snapshot
type: short
ingest: _attribute
flag: top
terms: true
- name: time
type: float
ingest: _attribute
flag: hidden
- name: Mass
units: '\(M_\odot\)'
type: float
descr: particle mass
- name: ''
type: float
title: position
units: kpc
sub:
- name: 'x'
units: kpc
type: float
descr: position in x
- name: 'y'
units: kpc
type: float
descr: position in y
- name: 'z'
units: kpc
type: float
descr: position in z
- name: ''
type: float
title: velocity
units: kpc
sub:
- name: v_x
units: km/s
type: float
descr: velocity in x
- name: v_y
units: km/s
type: float
descr: velocity in y
- name: v_z
units: km/s
type: float
descr: velocity in z
- name: ID
type: long
descr: particle ID
- name: J_R
units: km/s kpc
type: float
descr: radial action
ingest: _optional
- name: J_phi
units: km/s kpc
type: float
descr: azimuthal action
ingest: _optional
- name: J_z
units: km/s kpc
type: float
descr: vertical action
ingest: _optional
- name: Omega_R
units: km/s /kpc
type: float
descr: radial frequency
ingest: _optional
- name: Omega_phi
units: km/s /kpc
type: float
descr: azimuthal frequency
ingest: _optional
- name: Omega_z
units: km/s /kpc
type: float
descr: vertical frequency
ingest: _optional
- name: Theta_R
units: radians
type: float
descr: radial angle
ingest: _optional
- name: Theta_phi
units: radians
type: float
descr: azimuthal angle
ingest: _optional
- name: Theta_z
units: radians
type: float
descr: vertical angle
ingest: _optional
- name: R
units: kpc
type: float
descr: Galactocentric radius
ingest: _optional
- name: phi
units: radians
type: float
descr: Galactocentric azimuth
ingest: _optional
- name: v_R
units: km/s
type: float
descr: Galactocentric radial velocity
ingest: _optional
- name: v_phi
units: km/s
type: float
descr: Galactocentric azimuthal velocity
ingest: _optional