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44 papers · 2 filters
The origin of the diverse morphologies and kinematics of Milky Way-mass galaxies in the FIRE-2 simulations
Shea Garrison-Kimmel, Philip F. Hopkins, Andrew Wetzel +11
We use hydrodynamic cosmological zoom-in simulations from the FIRE project to explore the morphologies and kinematics of fifteen Milky Way (MW)-mass galaxies. Our sample ranges fro…
Discrete Effects in Stellar Feedback: Individual Supernovae, Hypernovae, and IMF Sampling in Dwarf Galaxies
Kung-Yi Su, Philip F. Hopkins, Christopher C. Hayward +6
Using high-resolution simulations from the FIRE-2 (Feedback In Realistic Environments) project, we study the effects of discreteness in stellar feedback processes on the evolution…
Reconciling observed and simulated stellar halo masses
Robyn E. Sanderson, Shea Garrison-Kimmel, Andrew Wetzel +6
We use cosmological hydrodynamical simulations of Milky-Way-mass galaxies from the FIRE project to evaluate various strategies for estimating the mass of a galaxy's stellar halo fr…
ALMA Detection of Bipolar Outflows: Evidence for Low Mass Star Formation within 1pc of Sgr A*
F. Yusef-Zadeh, M. Wardle, D. Kunneriath +3
We report the discovery of 11 bipolar outflows within a projected distance of 1pc from Sgr A* based on deep ALMA observations of CO, H30 and SiO (5-4) lines with sub-arcs…
On the rate of black hole binary mergers in galactic nuclei due to dynamical hardening
Nathan W. C. Leigh, Aaron M. Geller, B. McKernan +9
We assess the contribution of dynamical hardening by direct three-body scattering interactions to the rate of stellar-mass black hole binary (BHB) mergers in galactic nuclei. We de…
SWAG Water Masers in the Galactic Center
Juergen Ott, Nico Krieger, Matthew Rickert +4
The Galactic Center contains large amounts of molecular and ionized gas as well as a plethora of energetic objects. Water masers are an extinction-insensitive probe for star format…
The origin of ultra diffuse galaxies: stellar feedback and quenching
T. K. Chan, D. Kereš, A. Wetzel +5
We test if the cosmological zoom-in simulations of isolated galaxies from the FIRE project reproduce the properties of ultra diffuse galaxies. We show that stellar feedback-generat…
Optical Polarimetric and Near-Infrared Photometric Study of the RCW95 Galactic HII Region
Jaime Vargas-González, Alexandre Roman-Lopes, Fabio Pereira Santos +4
We carried out an optical polarimetric study in the direction of the RCW95 star forming region in order to probe the sky-projected magnetic field structure by using the distributio…
The Survey of Water and Ammonia in the Galactic Center (SWAG): Molecular Cloud Evolution in the Central Molecular Zone
Nico Krieger, Jürgen Ott, Henrik Beuther +21
The Survey of Water and Ammonia in the Galactic Center (SWAG) covers the Central Molecular Zone (CMZ) of the Milky Way at frequencies between 21.2 and 25.4 GHz obtained at the Aust…
Stellar feedback strongly alters the amplification and morphology of galactic magnetic fields
Kung-Yi Su, Christopher C. Hayward, Philip F. Hopkins +3
Using high-resolution magnetohydrodynamic simulations of idealized, non-cosmological galaxies, we investigate how cooling, star formation, and stellar feedback affect galactic magn…
Radiative cooling of swept up gas in AGN-driven galactic winds and its implications for molecular outflows
Alexander J. Richings, Claude-Andre Faucher-Giguere
We recently used hydro-chemical simulations to demonstrate that molecular outflows observed in luminous quasars can be explained by molecule formation within the AGN wind. However,…
Modelling chemical abundance distributions for dwarf galaxies in the Local Group: the impact of turbulent metal diffusion
Ivanna Escala, Andrew Wetzel, Evan N. Kirby +6
We investigate stellar metallicity distribution functions (MDFs), including Fe and -element abundances, in dwarf galaxies from the Feedback in Realistic Environments (FIRE) proj…
The Redshift Completeness of Local Galaxy Catalogs
S. R. Kulkarni, D. A. Perley, A. A. Miller
There is considerable interest in understanding the demographics of galaxies within the local universe (defined, for our purposes, as the volume within a radius of 200 Mpc or z<0.0…
Simulating galaxies in the reionization era with FIRE-2: morphologies and sizes
Xiangcheng Ma, Philip F. Hopkins, Michael Boylan-Kolchin +7
We study the morphologies and sizes of galaxies at z>5 using high-resolution cosmological zoom-in simulations from the Feedback In Realistic Environments project. The galaxies show…
Stacked star formation rate profiles of bursty galaxies exhibit 'coherent' star formation
Matthew E. Orr, Christopher C. Hayward, Erica J. Nelson +6
In a recent work based on 3200 stacked H maps of galaxies at , Nelson et al.~find evidence for `coherent star formation': the stacked SFR profiles of galaxies above (b…
The CARMA 3mm Survey of the Inner of the Central Molecular Zone
Marc W. Pound, Farhad Yusef-Zadeh
The Central Molecular Zone (CMZ) of the Galactic Center has to date only been fully mapped at mm wavelengths with singledish telescopes, with resolution about 30 (…
The multiphase circumgalactic medium traced by low metal ions in EAGLE zoom simulations
Benjamin D. Oppenheimer, Joop Schaye, Robert A. Crain +2
We explore the circumgalactic metal content traced by commonly observed low ion absorbers, including C II, Si II, Si III, Si IV, and Mg II. We use a set of cosmological hydrodynami…
Disrupted Globular Clusters and the Gamma-Ray Excess in the Galactic Centre
Giacomo Fragione, Fabio Antonini, Oleg Y. Gnedin
The Fermi Large Area Telescope has provided the most detailed view toward the Galactic Centre (GC) in high-energy gamma rays. Besides the interstellar emission and point-source con…
Measuring filament orientation: a new quantitative, local approach
C. -E. Green, J. R. Dawson, M. R. Cunningham +3
The relative orientation between filamentary structures in molecular clouds and the ambient magnetic field provides insight into filament formation and stability. To calculate the…
Black Holes on FIRE: Stellar Feedback Limits Early Feeding of Galactic Nuclei
Daniel Anglés-Alcázar, Claude-André Faucher-Giguère, Eliot Quataert +5
We introduce massive black holes (BHs) in the Feedback In Realistic Environments project and perform high-resolution cosmological hydrodynamic simulations of quasar-mass halos ($M_…
First Observation of the Submillimeter Polarization Spectrum in a Translucent Molecular Cloud
Peter C. Ashton, Peter A. R. Ade, Francesco E. Angilè +27
Polarized emission from aligned dust is a crucial tool for studies of magnetism in the ISM and a troublesome contaminant for studies of CMB polarization. In each case, an understan…
How To Model Supernovae in Simulations of Star and Galaxy Formation
Philip F. Hopkins, Andrew Wetzel, Dusan Keres +6
We study the implementation of mechanical feedback from supernovae (SNe) and stellar mass loss in galaxy simulations, within the Feedback In Realistic Environments (FIRE) project.…
TRES Survey of Variable Diffuse Interstellar Bands
Charles J. Law, Dan Milisavljevic, Kyle N. Crabtree +8
Diffuse interstellar bands (DIBs) are absorption features commonly observed in optical/near-infrared spectra of stars and thought to be associated with polyatomic molecules that co…
SIDM on FIRE: Hydrodynamical Self-Interacting Dark Matter simulations of low-mass dwarf galaxies
Victor H. Robles, James S. Bullock, Oliver D. Elbert +7
We compare a suite of four simulated dwarf galaxies formed in 10 haloes of collisionless Cold Dark Matter (CDM) with galaxies simulated in the same haloes with an…