scholarly journals Chandrasekhar limit for rotating quark stars

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Ashadul Halder ◽  
Shibaji Banerjee ◽  
Sanjay K. Ghosh ◽  
Sibaji Raha
Keyword(s):  
Quark Stars ◽  
Chandrasekhar Limit

scholarly journals The Chandrasekhar limit for quark stars

1999 ◽  
Vol 26 (1) ◽  
pp. L1-L4 ◽  
Author(s):  
Shibaji Banerjee ◽  
Sanjay K Ghosh ◽  
Sibaji Raha
Keyword(s):  
Quark Stars ◽  
Chandrasekhar Limit

scholarly journals Stable Up-Down Quark Matter Nuggets, Quark Star Crusts, and a New Family of White Dwarfs

Galaxies ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 70
Author(s):  
Lang Wang ◽  
Jian Hu ◽  
Cheng-Jun Xia ◽  
Jian-Feng Xu ◽  
Guang-Xiong Peng ◽  
...  
Keyword(s):  
Quark Matter ◽  
White Dwarfs ◽  
Maximum Mass ◽  
Quark Star ◽  
Small Surface ◽  
New Family ◽  
Quark Stars ◽  
Down Quark ◽  
The Stability ◽  
Chandrasekhar Limit

The possible existence of stable up-down quark matter (udQM) was recently proposed, and it was shown that the properties of udQM stars are consistent with various pulsar observations. In this work we investigate the stability of udQM nuggets and found at certain size those objects are more stable than others if a large symmetry energy and a small surface tension were adopted. In such cases, a crust made of udQM nuggets exists in quark stars. A new family of white dwarfs comprised entirely of udQM nuggets and electrons were also obtained, where the maximum mass approaches to the Chandrasekhar limit.

Strange Quark Matter as Dark Matter

2019 ◽  
Vol 22 (4) ◽  
pp. 311-317
Author(s):  
Hidezumi Terazawa
Keyword(s):  
Dark Matter ◽  
Quark Matter ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Quark Stars

New forms of matter such as super-hypernuclei (strange quark matter) and superhypernuclear stars (strange quark stars) as candidates for dark matter are discussed in some detail, based on the so-called "Bodmer–Terazawa–Witten hypothesis" assuming that they are stable absolutely or quasi-stable (decaying only weakly).

Quark stars in the Einstein-Gauss–Bonnet theory: A new branch of stellar configurations

2021 ◽  
pp. 168498
Author(s):  
Takol Tangphati ◽  
Anirudh Pradhan ◽  
Abdelghani Errehymy ◽  
Ayan Banerjee
Keyword(s):  
Quark Stars

scholarly journals Color-flavor locked quark stars in energy–momentum squared gravity

2021 ◽  
Vol 31 ◽  
pp. 100774
Author(s):  
Ksh. Newton Singh ◽  
Ayan Banerjee ◽  
S.K. Maurya ◽  
Farook Rahaman ◽  
Anirudh Pradhan
Keyword(s):  
Quark Stars

scholarly journals Gluon condensates, quark matter equation of state and quark stars

1994 ◽  
Vol 63 (4) ◽  
pp. 681-688 ◽  
Author(s):  
A. Mishra ◽  
H. Mishra ◽  
P. K. Panda ◽  
S. P. Misra
Keyword(s):  
Equation Of State ◽  
Quark Matter ◽  
Quark Stars ◽  
Gluon Condensates

scholarly journals The most massive white dwarfs in the solar neighbourhood

2021 ◽  
Vol 503 (4) ◽  
pp. 5397-5408
Author(s):  
Mukremin Kilic ◽  
P Bergeron ◽  
Simon Blouin ◽  
A Bédard
Keyword(s):  
White Dwarf ◽  
White Dwarfs ◽  
Transverse Velocity ◽  
Maximum Mass ◽  
Model Calculations ◽  
Rapid Rotation ◽  
Rotation Rates ◽  
Binary Mergers ◽  
Chandrasekhar Limit

ABSTRACT We present an analysis of the most massive white dwarf candidates in the Montreal White Dwarf Database 100 pc sample. We identify 25 objects that would be more massive than $1.3\, {\rm M}_{\odot }$ if they had pure H atmospheres and CO cores, including two outliers with unusually high photometric mass estimates near the Chandrasekhar limit. We provide follow-up spectroscopy of these two white dwarfs and show that they are indeed significantly below this limit. We expand our model calculations for CO core white dwarfs up to M = 1.334 M⊙, which corresponds to the high-density limit of our equation-of-state tables, ρ = 109 g cm−3. We find many objects close to this maximum mass of our CO core models. A significant fraction of ultramassive white dwarfs are predicted to form through binary mergers. Merger populations can reveal themselves through their kinematics, magnetism, or rapid rotation rates. We identify four outliers in transverse velocity, four likely magnetic white dwarfs (one of which is also an outlier in transverse velocity), and one with rapid rotation, indicating that at least 8 of the 25 ultramassive white dwarfs in our sample are likely merger products.

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