0 Assigned ID: 1758 ----- Attempting Submission 1 (Fri Apr 09 00:07:58 GMT 2021) ----- HST Phase I Proposal 1758 successfully submitted. Receipt: # 1758-1 ----- Attempting Submission 2 (Fri Apr 09 15:17:42 GMT 2021) ----- Outflows from galaxies are known to have a significant impact on the physical processes driving star formation and the evolution of galaxies. These winds are complex, so outflows must be observed at sub-kpc scales to tie wind properties with local driving sources. The Large Magellanic Cloud offers an opportunity to resolve star-formation-driven outflows at the right scales: it is face on, lacks an AGN, and individual sources are resolved in stars, gas, and dust. We propose an Archival Legacy program to map the LMC's galactic wind (and any inflows) using high-quality STIS and COS absorption-line observations along 140 sightlines to O, B, and WR stars together with a wealth of ancillary HI, H-alpha, and O VI observations. Using the detailed profiles of absorption in multiphase diagnostic UV ions, we will (1) characterize the ionization state and kinematics of the wind, (2) measure its covering fraction, mass distribution, and outflow rate, and (3) assess the impact of the 30 Doradus starburst on the flow. We will compare the observed LMC winds with new constrained-realization simulations of the Milky Way/Magellanic system to disentangle these outflows from surrounding coronal gas. We will release high-level data products, including science-ready databases of line measurements, customized packages of ancillary data, simulated maps and spectra, and visualization tools. This large-scale, resolved census of the LMC's outflow will fill a critical gap in our knowledge of how winds work with an unprecedentedly large sample of measurements right at the scale of the driving forces, in a galaxy where all the major influences can be resolved. PI Kat Barger has considerable expertise spanning multiple wavelength bands, including radio (HI 21-cm) and optical emission-line spectroscopy, and UV absorption-line spectroscopy with HST COS/STIS. She has led and is leading numerous projects on the circumgalactic medium gas of the Milky Way, Magellanic Clouds, and Andromeda. She is currently leading the HST 15161 project entitled "The fate of infalling gas during its final approach onto the Milky Way disk and the HST 16219 project entitled "Exploring the origin of the M31-M33 filament". She has additionally lead the efforts which confirmed that the LMC outflows are associated with a galacitc wind in her Barger et al. 2016 study and she supervised the Ciampa et al. 2021 project in which her Ph.D. student mapped the LMC's wind in H-alpha emission. She will led the overall project efforts of this proposed Legacy Archive study. CoI Andrew Fox, Frances Cashman, Nicolas Lehner, Chris Howk, and Jason Tumlinson are experts in UV absorption-line spectroscopy and have substantial amount experience investigating the gas cycle in the Milky Way, the Magellanic Clouds, and distant galaxies. Fox has also led numerous HST projects, including HST 12604 entitled "Ionization in the Magellanic Stream: A Case Study of Galactic Accretion" and HST 13840 entitled "The Smith Cloud: Galactic or Extragalactic?". CoIs Fox and Cashman have considerable experience running Cloudy radiative transfer models and will be leading those efforts. Lehner has led numerous HST projects and is currently leading the Absorption Maps In the Gas of Andromeda (AMIGA) project HST 14268 to map the circumgalactic medium of M31. Both CoIs Lehner and Howk have lead studies on the LMC outflows, including Howk et al. 2002, Lehner et al. 2007, 2009. CoI Tumlinson is a leader in the circumgalactic medium community and is the leader of the COS Halos team (HST 9874, 11598, 12248, 13033). These CoI will help with the UV spectroscopic analysis and interpreting the results. CoI Krishnarao is an experienced spectroscopist in radio (HI 21-cm) and optical emission-line spectroscopy and HST UV absorption-line spectroscopy. He has lead numerous projects on the Milky Way's interstellar medium and Seyfert flare. With CoI Fox, he is leading the efforts on HST project 16363 (PI D'Onghia) to search for the LMC's corona using background QSOs off the side of the LMC. Krishnarao is also a principle member fo the WHAM team. He will lead our night only reduction, kriging efforts, and the python package for reading, analyzing, and visualizing our data products. CoI McClure-Griffiths is a leader in the HI-21 cm community, who lead the GASS survey and is a principle leader in the ongoing GASKAP survey. She has lead numerous projects on the circumgalactic medium of the Magellanic Clouds. She will lead the HI GASKAP efforts on this project. CoI D'Onghia has led numerous galaxy simulation projects, including 3D hydrodynamical simulations on the galactic outflows of the LMC while in embedded in an ambient halo medium (Bustard+2018 & 2019, which was her graduate student). These simulations included ram-pressure stripping and cosmic ray driven feedback. And CoI Lucchini has specifically lead LMC based simulations that includes the this galaxy traveling through the Milky Way's halo (Lucchini et al. 2020). These CoIs will lead the hydrodynamical simulation efforts. They will help us to disentangle the LMC's and MW's halo from our HST observations using mock spectroscopic observations of their simulations as a guide. Additionally, they will help us place constraints on the physical distance along the line of sight that the outflows have likely reached and on the velocity evolution of the ejected material so that we can better determine the mass, mass-flow rate, and mass loading factor of the wind. Galaxies 0 Legacy false false true false false SUPPORTED