scholarly journals Photon spectrum of asymmetric dark stars

Author(s):  
Andrea Maselli ◽  
Chris Kouvaris ◽  
Kostas D. Kokkotas

Asymmetric Dark Stars, i.e. compact objects formed from the collapse of asymmetric dark matter could potentially produce a detectable photon flux if dark matter particles self-interact via dark photons that kinetically mix with ordinary photons. The morphology of the emitted spectrum is significantly different and therefore distinguishable from a typical black-body one. Given the above and the fact that asymmetric dark stars can have masses outside the range of neutron stars, the detection of such a spectrum can be considered as a smoking gun signature for the existence of these exotic stars.

2020 ◽  
Vol 102 (6) ◽  
Author(s):  
O. Ivanytskyi ◽  
V. Sagun ◽  
I. Lopes

Author(s):  
Arun Kenath ◽  
Kiren O. V. ◽  
Sivaram C

In a recent paper we had discussed possibility of DM at high redshifts forming primordial planets composed entirely of DM to be one of the reasons for not detecting DM (as the flux of ambient DM particles would be consequently reduced). In this paper we discuss the evolution of these DM objects as the universe expands. As universe expands there will be accretion of DM, Helium and Hydrogen layers (discussed in detail) on these objects. As they accumulate more and more mass, the layers get heated up leading to nuclear reactions which burn H and He when a critical thickness is reached. In the case of heavier masses of these DM objects, matter can be ejected explosively. It is found that the time scale of ejection is smaller than those from other compact objects like neutron stars (that lead to x-ray bursts). These flashes of energy could be a possible observational signature for these dense DM objects.


2021 ◽  
Vol 32 ◽  
pp. 100796
Author(s):  
Raul Ciancarella ◽  
Francesco Pannarale ◽  
Andrea Addazi ◽  
Antonino Marcianò
Keyword(s):  

1980 ◽  
Vol 4 (1) ◽  
pp. 49-50
Author(s):  
R. A. Gingold ◽  
J. J. Monaghan

Misner Thorne and Wheeler (1973), (page 629) suggested that a freshly formed White Dwarf star of several solar masses would, if slowly — rotating, collapse to form a neutron star pancake which would become unstable and eventually produce several, possibly colliding, neutron stars.


2015 ◽  
Vol 115 (12) ◽  
Author(s):  
Isabel García García ◽  
Robert Lasenby ◽  
John March-Russell

2013 ◽  
Vol 2013 (08) ◽  
pp. 003-003 ◽  
Author(s):  
Graciela B Gelmini ◽  
Ji-Haeng Huh ◽  
Thomas Rehagen

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