Effects of dark matter in star formation

Arun, Kenath; Gudennavar, S. B.; Prasad, A.; Sivaram, C.

doi:10.1007/s10509-019-3511-6

Cited by 14 publications

(11 citation statements)

References 13 publications

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“…Ongoing studies have been focusing on different aspects of compact objects, including bosonic DM stars (Eby et al 2016;Lee et al 2021, in preparation), formation of neutron stars through the accretioninduced collapse of DM-admixed white dwarfs (WDs; Leung et al 2019;Zha et al 2019), tidal properties of DM-admixed neutron stars (Leung et al 2021, in preparation), thermalization of the WD core to produce a thermonuclear runaway (Bramante 2015;Acevedo & Bramante 2019;Janish et al 2019;Steigerwald et al 2019), and thermonuclear supernovae with point-mass DM cores (Leung et al 2015a). Other than compact objects, effects of DM admixture on stellar formation (Arun et al 2019) and evolution (Scott et al 2008;Freese et al 2016;Lopes & Lopes 2019) are actively investigated. In particular, the evolution of AGB stars is used to constrain the properties of axion-like particles (Dolan et al 2021).…”

Section: Dm-admixed Stellar Objectsmentioning

confidence: 99%

Delayed Detonation Thermonuclear Supernovae with an Extended Dark Matter Component

Chan

Chu

Leung

et al. 2021

ApJ

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We present spherically symmetric simulations of the thermonuclear explosion of a white dwarf admixed with an extended component of fermionic dark matter, using the deflagration model with the deflagration-detonation transition. In all the dark matter admixed models we have considered, the dark matter is left behind after the explosion as a compact dark star. The presence of dark matter lengthens the deflagration phase to produce a similar amount of iron-group elements and more thermoneutrinos. Dark matter admixed models also give dimmer but slowly declining light curves, consistent with some observed peculiar supernovae. Our results suggest a formation path for dark compact objects that mimic sub-solar-mass black holes as dark gravitational sources.Unified Astronomy Thesaurus concepts: Dark matter (353); Type Ia supernovae (1728); Hydrodynamical simulations (767); Supernova neutrinos (1666); Light curves (918) The Deflagration-Detonation Transition (DDT) as a Supernova Explosion ModelWDs are believed to be the progenitors for thermonuclear supernovae (Hillebrandt et al. 2013;Maoz et al. 2014;Livio & Mazzali 2018). However, it is not clear which kind of WDs and explosion mechanisms are responsible for such energetic events (Ruiter 2019). It is believed that most of the progenitor

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Section: Dm-admixed Stellar Objectsmentioning

confidence: 99%

Delayed Detonation Thermonuclear Supernovae with an Extended Dark Matter Component

Chan

Chu

Leung

et al. 2021

ApJ

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“…On-going studies focus on different perspectives of compact stars including bosonic DM stars (Eby et al 2016), formation of a neutron star through accretion-induced collapse of a DM-admixed white dwarf (Leung et al 2019;Zha et al 2019), thermalization of the white dwarf (WD) core to produce thermonuclear runaway (Bramante 2015;Acevedo & Bramante 2019;Janish et al 2019;Steigerwald et al 2019), and point-mass DM-admixed in thermonuclear supernovae (Leung et al 2015a). Recent studies have been made on DM-admixed pulsars (Rahman et al 2020), effects of DM admixture on star formation (Arun et al 2019), bosonic DM-admixed neutron stars with relativistic Bose-Einstein Condensation (Lee et al, in prep) and tidal Love numbers of DM-admixed neutron stars (Leung et al, in prep). DM-admixed astrophysical objects have become a new window to search for astrophysical DM.…”

Section: Dm Admixed Stellar Objectsmentioning

confidence: 99%

Delayed Detonation Thermonuclear Supernovae With An Extended Dark Matter Component

Chan,

Chu,

Leung

et al. 2020

Preprint

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We present simulations of thermonuclear supernovae admixed with an extended component of fermionic cold dark matter. We consider the explosion of a Chandrasekhar-mass white dwarf using the deflagration model with deflagration-detonation transition with spherical symmetry. The dark matter component is comparable in size with that of the normal matter, and so the system is described by two-fluid, one-dimensional Eulerian hydrodynamics. The explosion leaves all the dark matter trapped as a remnant compact dark star in all of our considered models. The presence of dark matter lengthens the deflagration phase to produce more thermo-neutrinos and similar amounts of iron-group elements compared to those of ordinary explosions with no dark matter admixture. The dark matter admixed models produce dimmer and broader light curves, which challenge the role of thermonuclear supernovae as standard candles in cosmic distance measurement. Our results also suggest a formation path of dark compact objects which mimic sub-solar-mass black holes as dark gravitational sources, through near-solar-mass dark matter admixed thermonuclear supernovae.

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“…Besides terrestrial experiments, physicists are tackling the DM problem through astrophysical observations. It is shown that in a region with a high concentration of DM particles, DM could be captured by normal matter (NM, Sulistiyowati et al 2014;Arun et al 2019). Therefore, it is natural to expect stellar objects composed of NM and DM.…”

Section: Introduction 1dark Matter-admixed Astrophysical Objectsmentioning

confidence: 99%

Accretion-induced Collapse of Dark Matter-admixed Rotating White Dwarfs: Dynamics and Gravitational-wave Signals

Chan¹,

Chu²,

Leung³

2023

Preprint

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We present two-dimensional hydrodynamic simulations of the accretion-induced collapse (AIC) of rotating white dwarfs admixed with an extended component of dark matter (DM) comprising of sub-GeV degenerate fermionic DM particles. We find that the DM component would follow the collapse of the normal matter (NM) component to become a bound DM core. Thus, we demonstrate how a DM-admixed neutron star could form through DM-admixed AIC (DMAIC) for the first time, with the dynamics of DM taken into account. The gravitational-wave (GW) signature from the DMAIC shows distinctive features. In the diffusive DM limit, the DM admixture indirectly suppresses the post-bounce spectral peak of the NM GWs. In the compact DM limit, the collapse dynamics of the DM in a Milky Way event generate GWs that are strong enough to be detectable by Advanced LIGO as continuous low-frequency (< 1000 Hz) signals after the NM core bounce. Our study not only is the first-ever computation of GW from a collapsing DM object but also provides the key features to identify DM in AIC events through future GW detections.

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Effects of dark matter in star formation

Cited by 14 publications

References 13 publications

Delayed Detonation Thermonuclear Supernovae with an Extended Dark Matter Component

Delayed Detonation Thermonuclear Supernovae with an Extended Dark Matter Component

Delayed Detonation Thermonuclear Supernovae With An Extended Dark Matter Component

Accretion-induced Collapse of Dark Matter-admixed Rotating White Dwarfs: Dynamics and Gravitational-wave Signals

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