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We present a local and transferable machine learning approach capable of predicting the real-space density response of both molecules and periodic systems to external homogeneous electric fields. The new method, SALTER, builds on the…

Chemical Physics · Physics 2023-07-19 Alan M Lewis , Paolo Lazzaroni , Mariana Rossi

There is a broad consensus from theory that stellar feedback in galaxies at high redshifts is essential to their evolution, alongside conflicting evidence in the observational literature about its prevalence and efficacy. To this end, we…

We demonstrate the feasibility and potential of using large integral field spectroscopic surveys to investigate the prevalence of galactic-scale outflows in the local Universe. Using integral field data from SAMI and the Wide Field…

We apply our two-dimensional (2D), radially self-similar steady-state accretion flow model to the analysis of hydrodynamic simulation results of supercritical accretion flows. Self-similarity is checked and the input parameters for the…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Cheng-Liang Jiao , Shin Mineshige , Shun Takeuchi , Ken Ohsuga

This paper investigates the mathematical properties of a stochastic version of the balanced 2D thermal quasigeostrophic (TQG) model of potential vorticity dynamics. This stochastic TQG model is intended as a basis for parametrisation of the…

Analysis of PDEs · Mathematics 2023-05-04 Dan Crisan , Darryl D. Holm , Oana Lang , Prince Romeo Mensah , Wei Pan

Intermediate mass protostarsprovide a bridge between theories of low- and high-mass star formation. Emerging molecular outflows can be used to determine the influence of fragmentation and multiplicity on protostellar evolution through the…

We present high resolution spectroscopic VLT observations of the outflow seen in QSO 2359-1241. These data contain absorption troughs from five resonance Fe II lines with a resolution of ~7 km/s and signal-to-noise ratio per resolution…

Astrophysics · Physics 2010-11-05 Nahum Arav , Maxwell Moe , Elisa Costantini , Kirk T. Korista , Chris Benn , Sara Ellison

Stellar feedback-driven outflows regulate the stellar formation and chemical enrichment of galaxies, yet the underlying dependence of mass outflow rate on galaxy properties remains largely unknown. We develop a simple yet comprehensive…

Astrophysics of Galaxies · Physics 2023-03-14 Yuanye Lin , Ying Zu

Absorption line studies are essential to understanding the origin, nature, and impact of starburst-driven galactic outflows. Such studies have revealed a multiphase medium with a number of poorly-understood features leading to a need to…

Astrophysics of Galaxies · Physics 2018-09-19 J'Neil Cottle , Evan Scannapieco , Marcus Bruggen

We examine metal and entropy content in galaxy groups having T_X~0.5-2 keV in cosmological hydrodynamic simulations. Our simulations include a well-constrained prescription for galactic outflows following momentum-driven wind scalings, and…

Astrophysics · Physics 2009-11-13 Romeel Davé , Benjamin D. Oppenheimer , Suresh Sivanandam

We have observed 99 mid-infrared-bright, massive young stellar objects and compact HII regions drawn from the Red MSX source (RMS) survey in the J=3$-$2 transition of $^{12}$CO and $^{13}$CO, using the James Clerk Maxwell Telescope. 89…

Solar and Stellar Astrophysics · Physics 2015-09-02 L. T. Maud , T. J. T. Moore , S. L. Lumsden , J. C. Mottram , J. S. Urquhart , M. G. Hoare

Lyman-$\alpha$ transits provide an opportunity to test models of atmospheric escape directly. However, translating observations into constraints on the properties of the escaping atmosphere is challenging. The major reason for this is that…

Earth and Planetary Astrophysics · Physics 2024-11-01 Ethan Schreyer , James. E. Owen , R. O. Parke Loyd , Ruth Murray-Clay

Quasar outflows have been posited as a mechanism to couple super-massive black holes to evolution in their host galaxies. We use multi-epoch spectra from the Hubble Space Telescope and ground-based observatories to study the outflows in…

Astrophysics of Galaxies · Physics 2018-12-05 E. A. Moravec , F. Hamann , D. M. Capellupo , S. M. McGraw , J. C. Shields , P. Rodríguez Hidalgo

We review some aspects of the bipolar molecular outflow phenomenon. In particular, we compare the morphological properties, energetics and velocity structures of outflows from high and low-mass protostars and investigate to what extent a…

Astrophysics · Physics 2007-05-23 John Richer , Debra Shepherd , Sylvie Cabrit , Rafael Bachiller , Ed Churchwell

Our ability to trace the star-forming molecular gas is important to our understanding of the Universe. We can trace this gas using CO emission, converting the observed CO intensity into the H$_2$ gas mass of the region using the CO-to-H$_2$…

Current constraints on models of galaxy evolution rely on morphometric catalogs extracted from multi-band photometric surveys. However, these catalogs are altered by selection effects that are difficult to model, that correlate in non…

Instrumentation and Methods for Astrophysics · Physics 2017-09-06 Sébastien Carassou , Valérie de Lapparent , Emmanuel Bertin , Damien Le Borgne

We use cosmological hydrodynamic simulations with stellar feedback from the FIRE project to study the physical nature of Lyman limit systems (LLSs) at z<1. At these low redshifts, LLSs are closely associated with dense gas structures…

Astrophysics of Galaxies · Physics 2017-06-21 Z. Hafen , C. -A. Faucher-Giguere , D. Angles-Alcazar , D. Keres , R. Feldmann , T. K. Chan , E. Quataert , N. Murray , P. F. Hopkins

Observations of collimated outflows in young stellar objects indicate that several features of the jets can be understood by adopting the picture of a two-component outflow, wherein a central stellar component around the jet axis is…

Astrophysics · Physics 2009-11-13 T. Matsakos , K. Tsinganos , N. Vlahakis , S. Massaglia , A. Mignone , E. Trussoni

We derive semi-analytic solutions for the thermally driven cumulative outflow from a dense stellar cluster that consists of a large number of stars with strong stellar winds, under the key assumption that their mass and energy deposition…

Solar and Stellar Astrophysics · Physics 2025-07-28 Stan Owocki

We characterize the physical properties of star-formation driven outflows in a sample of 29 local dwarf galaxies drawn from the Dwarf Galaxy Survey. We make use of Herschel/PACS archival data to search for atomic outflow signatures in the…