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Title: Numerical Simulations of a Jet–Cloud Collision and Starburst: Application to Minkowski’s Object

Abstract

In this work, we present results of three-dimensional, multi-physics simulations of an AGN jet colliding with an intergalactic cloud. The purpose of these simulations is to assess the degree of "positive feedback," i.e., jet-induced star formation, that results. We have specifically tailored our simulation parameters to facilitate a comparison with recent observations of Minkowski's Object (MO), a stellar nursery located at the termination point of a radio jet coming from galaxy NGC 541. As shown in our simulations, such a collision triggers shocks, which propagate around and through the cloud. These shocks condense the gas and under the right circumstances may trigger cooling instabilities, creating runaway increases in density, to the point that individual clumps can become Jeans unstable. Our simulations provide information about the expected star formation rate, total mass converted to H I, H 2, and stars, and the relative velocity of the stars and gas. Finally, our results confirm the possibility of jet-induced star formation, and agree well with the observations of MO.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4];  [1]
  1. College of Charleston, SC (United States). Department of Physics & Astronomy
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Univ. of California, Berkeley, CA (United States). Astronomy Department; Eureka Scientific, Inc., Oakland, CA (United States)
  4. National Radio Astronomy Observatory, Charlottesville, VA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1438764
Report Number(s):
LLNL-JRNL-724661
Journal ID: ISSN 1538-4357
Grant/Contract Number:
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 850; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; galaxies: individual (Minkowski’s Object); galaxies: jets; hydrodynamics; intergalactic medium; shock waves

Citation Formats

Fragile, P. Chris, Anninos, Peter, Croft, Steve, Lacy, Mark, and Witry, Jason W. L.. Numerical Simulations of a Jet–Cloud Collision and Starburst: Application to Minkowski’s Object. United States: N. p., 2017. Web. doi:10.3847/1538-4357/aa95c6.
Fragile, P. Chris, Anninos, Peter, Croft, Steve, Lacy, Mark, & Witry, Jason W. L.. Numerical Simulations of a Jet–Cloud Collision and Starburst: Application to Minkowski’s Object. United States. doi:10.3847/1538-4357/aa95c6.
Fragile, P. Chris, Anninos, Peter, Croft, Steve, Lacy, Mark, and Witry, Jason W. L.. Thu . "Numerical Simulations of a Jet–Cloud Collision and Starburst: Application to Minkowski’s Object". United States. doi:10.3847/1538-4357/aa95c6.
@article{osti_1438764,
title = {Numerical Simulations of a Jet–Cloud Collision and Starburst: Application to Minkowski’s Object},
author = {Fragile, P. Chris and Anninos, Peter and Croft, Steve and Lacy, Mark and Witry, Jason W. L.},
abstractNote = {In this work, we present results of three-dimensional, multi-physics simulations of an AGN jet colliding with an intergalactic cloud. The purpose of these simulations is to assess the degree of "positive feedback," i.e., jet-induced star formation, that results. We have specifically tailored our simulation parameters to facilitate a comparison with recent observations of Minkowski's Object (MO), a stellar nursery located at the termination point of a radio jet coming from galaxy NGC 541. As shown in our simulations, such a collision triggers shocks, which propagate around and through the cloud. These shocks condense the gas and under the right circumstances may trigger cooling instabilities, creating runaway increases in density, to the point that individual clumps can become Jeans unstable. Our simulations provide information about the expected star formation rate, total mass converted to H I, H2, and stars, and the relative velocity of the stars and gas. Finally, our results confirm the possibility of jet-induced star formation, and agree well with the observations of MO.},
doi = {10.3847/1538-4357/aa95c6},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 850,
place = {United States},
year = {Thu Nov 30 00:00:00 EST 2017},
month = {Thu Nov 30 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 30, 2018
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