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5 results for “galaxies: interactions”
Interactive Visualizations for: "Virgo Filaments II: Catalog and First Results on the Effect of Filaments on galaxy properties"
<p>This deposit includes 13 HTML 3D interactive visualizations of filaments and galaxies investigated in the accepted article, "<em>Virgo Filaments II: Catalog and First Results on the Effect of Filaments on galaxy properties</em>" by Castignani et al. (accepted, 20-Oct-2021).</p> <p>The specific files correspond to the filaments listed in Table 2 of the accepted manuscript:</p> <table align="left"> <caption>Tabulated HTML files and filaments</caption> <thead> <tr> <th scope="col">HTML File</th> <th scope="col">Filament (Table 2)</th> </tr> </thead> <tbody> <tr> <td> <p>SG_cube_Virgo_Serpens_Filament.html</p> </td> <td> <p>Serpens F.</p> </td> </tr> <tr> <td> <p>SG_cube_Virgo_Coma_Berenices_Filament.html</p> </td> <td> <p>Coma Berenices F.</p> </td> </tr> <tr> <td> <p>SG_cube_VirgoIII_Filament.html</p> </td> <td> <p>VirgoIII F.</p> </td> </tr> <tr> <td> <p>SG_cube_Ursa_Major_Cloud.html</p> </td> <td> <p>Ursa Major Cloud</p> </td> </tr> <tr> <td> <p>SG_cube_NGC5353_4_Filament.html</p> </td> <td> <p>NGC5353/4 F.</p> </td> </tr> <tr> <td> <p>SG_cube_Leo_Minor_Filament.html</p> </td> <td> <p>Leo Minor F.</p> </td> </tr> <tr> <td> <p>SG_cube_LeoII_B_Filament.html</p> </td> <td> <p>LeoII B F.</p> </td> </tr> <tr> <td> <p>SG_cube_Canes_Venatici_Filament.html</p> </td> <td> <p>Canes Venatici F</p> </td> </tr> <tr> <td> <p>SG_cube_W-M_Sheet.html</p> </td> <td> <p>W-M Sheet</p> </td> </tr> <tr> <td> <p>SG_cube_Virgo_Draco_Filament.html</p> </td> <td> <p>Draco F.</p> </td> </tr> <tr> <td> <p>SG_cube_Virgo_Bootes_Filament.html</p> </td> <td> <p>Bootes F.</p> </td> </tr> <tr> <td> <p>SG_cube_Leo_Minor_B_Filament.html</p> </td> <td> <p>Leo Minor B F.</p> </td> </tr> <tr> <td> <p>SG_cube_LeoII_A_Filament.html</p> </td> <td> <p>LeoII A F.</p> </td> </tr> </tbody> </table> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p>For each visualization galaxies within 2 Mpc are color-coded by the 3D local density, and galaxies with separations greater than 2 Mpc are shown with the grey points. The filament spine is shown with the black curve.</p> <p>The files were created with plotly.js v1.58.4.</p> <p> </p>
Advanced PySPAM: An Infrastructure to Constrain Underlying Interacting Galaxy Parameters Synthetic Results
<p>This database contains the results for the Chapter 3 of DOR's thesis. For a full description of these results and the way they were built, please see <em>Link to be added on publication</em>.</p> <p>The aim of this Chapter was to use MCMC methods with a fast, efficient simulation algorithm (APySPAM) to constrain the underyling parameters of observed interacting galaxy systems. This algorithm used a Chi-Squared distance minimisation between morphology distributions of observed and simulated images to constrain 13 underlying parameters of galaxy interaction. We applied our algorithm to to 50 of the 62 systems described in <a href="https://ui.adsabs.harvard.edu/abs/2016MNRAS.459..720H/abstract">Holincheck et al. (2016).</a></p> <p>We opted to use the Holincheck et al. sample as the underlying parameters of these systems had already been constrained using a Citizen Science project named <a href="https://mergers.galaxyzoo.org/">Galaxy Zoo: Mergers</a>. This gave us a ground truth to which compare our constraints to. We created synthetic observations of each image, and then ran our MCMC over them, achieving constraint across the sample and parameter space. However, when applied to observational data (we opted to use SDSS images of these systems) we are unable to constrain the full parameter space. This is particularily true of the orientations of the interacting system and their relative sizes.</p> <p>Exploring using velocity information in our constraints find that we improve almost all our constrains considerably. Therefore, adding in spectroscopic information to this method could drastically improve it. The main limitation of this approach, however, is computation time with each system taking approximately 20 hours on a well parallelised HPC to converge. Alternatives to improve performance lie in simulation based inference (SBI, an introduction can be found <a href="https://arxiv.org/pdf/2009.08459">here</a>) or including the use of GPUs (such as done by NVIDEA in fluid dynamics <a href="https://developer.nvidia.com/blog/ai-powered-simulation-tools-for-surrogate-modeling-engineering-workflows-with-siml-ai-and-nvidia-modulus/">here</a>)</p> <p>The results are portrayed as corner plots, with contour plots showing the distribution of likelihoods found in each MCMC run and the histograms on the side showing the marginalised posterior distributions.</p>
The TELPERION Survey for Extended Emission Regions around AGN: a strongly-interacting and merging galaxy sample
<p>FITS files of narrowband and broadband images used in the search of the TELPERION merging-galaxy sample for AGN-ionized extended [O III] clouds, and confirming longslit spectrum as described in the manuscript. A full list of observation sites and dates, and guide to file names, are in the file 000Readme.txt</p> <p>Analysis is in the paper of the same title submitted to the Monthly Notices of the Royal Astronomical Society.</p> <p> </p>
Data for: Harnessing the Hubble Space Telescope Archives: A Catalogue of 21,926 Interacting Galaxies
<p>This repository contains the data released in the paper "Harnessing the Hubble Space Telescope Archives: A Catalogue of 21,926 Interacting Galaxies"<em> </em>(DOI: <a href="https://ui.adsabs.harvard.edu/abs/2023ApJ...948...40O/abstract">10.3847/1538-4357/acc0ff</a>).</p> <p>We release the catalogue of interacting galaxies found in this work, as well as any objects of interest found during the visual inspection stage of de-contamination. Each catalogue contains the SourceID, Right Ascension, Declination and the "Status" of each object. The status shows whether an object has appeared in the astrophysical literature prior to this work. <strong>Each catalogue is contained in a .csv file</strong>.</p> <p>The exception to this is the interacting galaxy catalogue itself, which also contains the Zoobot prediction of each source to be an interacting galaxy.</p> <p>We also include the images that correspond to each catalogue. <strong>These are contained within the .tar.gz files in the repository.</strong> Each .tar.gz filename corresponds to the catalogue .csv filename. The individual filenames are the SourceIDs of the corresponding objects.</p> <p>Please note: These images have been saved as 150x150 gray images using only the F814W filter of the <em>HST</em>. Different dimension images/multi-band photometry will have to be found by the user. When input into our Zoobot model, these had been resized to 300x300.</p> <p>Please also note: <strong>Each sub-category of object has</strong> <strong>only been classified visually</strong>.</p> <p>A list of the catalogue definitions is below:</p> <ol> <li>agn-catalogue - Catalogue of sources containing an Active Galactic Nuclei or a Quasar.</li> <li>groups-catalogue - Catalogue of sources containing a Galaxy Group.</li> <li>high_z-catalogue - Catalogue of sources containing high redshift galaxies.</li> <li>interacting-catalogue - Catalogue of sources predicted to be interacting galaxies. This is the main catalogue.</li> <li>jellyfish-catalogue - Catalogue of sources containing a Jellyfish galaxy.</li> <li>jets-catalogue - Catalogue of sources containing a galaxy with a jet.</li> <li>lenses-catalogue - Catalogue of sources containing a gravitational lense.</li> <li>ly-catalogue - Catalogue of sources which are Lyman-Alpha galaxies.</li> <li>overlap-catalogue - Catalogue of sources which contain two galaxies which overlap by projection, but are not interacting.</li> <li>planetary-catalogue - Catalogue of sources which contain edge on planetary disks.</li> <li>radio-catalogue - Catalogue of sources which contain a radio source/jet.</li> <li>ring-catalogue - Catalogue of sources which contain ring galaxies.</li> <li>submillimetre-dusty-catalogue - Catalogue of sources which contain submillimetre or dusty galaxies.</li> <li>supernova-catalogue - Catalogue of sources which contain a supernova remnant.</li> <li>unknown-catalogue - Catalogue of sources which could not be classified visually.</li> <li>ysc-catalogue - Catalogue of sources which contain a Young Stellar Cluster.</li> <li>yso-catalogue - Catalogue of sources which contain a Young Stellar Object.</li> </ol>
Using Galaxy to Perform Large-Scale Interactive Data Analyses - An update
<p>Datasets and workflows supporting the protocols described in the article "Using Galaxy to Perform Large‐Scale Interactive Data Analyses - An update".</p>
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