Supramassive dark objects with neutron star origin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F24%3A00377947" target="_blank" >RIV/68407700:21670/24:00377947 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.109.123006" target="_blank" >https://doi.org/10.1103/PhysRevD.109.123006</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.109.123006" target="_blank" >10.1103/PhysRevD.109.123006</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Supramassive dark objects with neutron star origin

Popis výsledku v původním jazyce

Until today, the nature of dark matter (DM) remains elusive despite all our efforts. This missing matter of the Universe has not been observed by the already operating DM direct-detection experiments, but we can infer its gravitational effects. Galaxies and clusters of galaxies are most likely to contain DM trapped to their gravitational field. This leads us to the natural assumption that compact objects might contain DM too. Among the compact objects exist in galaxies, neutron stars are considered as natural laboratories, where theories can be tested, and observational data can be received. Thus, many models of DM have proposed its presence in those stars. In particular, in the present study we focus on two types of dark matter particles, namely, fermions and bosons with a mass range of [0.01-1.5] GeV and self-interaction strength in the range [10-4-10-1] MeV-1. By employing the two-fluid model, we discovered a stable area in the mass-radius diagram of a celestial formation consisting of neutron star matter and DM that is substantial in size. This formation spans hundreds of kilometers in diameter and possesses a mass equivalent to 100 or more times the solar mass. To elucidate, this entity resembles an enormous celestial body of DM, with a neutron star at its core. This implies that a supramassive stellar compact entity can exist without encountering any issues of stability and without undergoing a collapse into a black hole. In any case, the present theoretical prediction can, if combined with corresponding observations, shed light on the existence of DM and even more on its basic properties.

Název v anglickém jazyce

Supramassive dark objects with neutron star origin

Popis výsledku anglicky

Until today, the nature of dark matter (DM) remains elusive despite all our efforts. This missing matter of the Universe has not been observed by the already operating DM direct-detection experiments, but we can infer its gravitational effects. Galaxies and clusters of galaxies are most likely to contain DM trapped to their gravitational field. This leads us to the natural assumption that compact objects might contain DM too. Among the compact objects exist in galaxies, neutron stars are considered as natural laboratories, where theories can be tested, and observational data can be received. Thus, many models of DM have proposed its presence in those stars. In particular, in the present study we focus on two types of dark matter particles, namely, fermions and bosons with a mass range of [0.01-1.5] GeV and self-interaction strength in the range [10-4-10-1] MeV-1. By employing the two-fluid model, we discovered a stable area in the mass-radius diagram of a celestial formation consisting of neutron star matter and DM that is substantial in size. This formation spans hundreds of kilometers in diameter and possesses a mass equivalent to 100 or more times the solar mass. To elucidate, this entity resembles an enormous celestial body of DM, with a neutron star at its core. This implies that a supramassive stellar compact entity can exist without encountering any issues of stability and without undergoing a collapse into a black hole. In any case, the present theoretical prediction can, if combined with corresponding observations, shed light on the existence of DM and even more on its basic properties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA21-24281S" target="_blank" >GA21-24281S: Experiment IS581 "Štěpení těžkých radiaktivních svazků v reakcích (d,p)-transferu"</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

109

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

"123006-1"-"123006-11"

Kód UT WoS článku

001240759700008

EID výsledku v databázi Scopus

2-s2.0-85195395373