| Name: | Zenia Zuraiq |
| Affiliation: | Indian Institute of Science |
| Conference ID : | ASI2024_430 |
| Title : | Simulating super-Chandrasekhar white dwarf from main sequence star: Exploring stellar evolution codes STARS and MESA |
| Authors : | Zenia Zuraiq1, Banibrata Mukhopadhyay1, Achal Kumar1,2, Surendra Bhattarai3, Alexander J. Hackett4, Arnab Sarkar4, Christopher A. Tout4 |
| Authors Affiliation: | 1 Zenia Zuraiq, Banibrata Mukhophyay, Achal Kumar Affiliation (Indian Institute of Science, Bangalore - 560012, India)
2 Achal Kumar Affiliation (University of Florida, Florida - 32611, United States of America)
3 Surendra Bhattarai Affiliation (Indian Institute of Science Education and Research, Kolkata - 741246, India)
4 Alexander J. Hackett, Arnab Sarkar, Christopher A. Tout Affiliation (University of Cambridge, Cambridge - CB3 0HA, United Kingdom)
|
| Mode of Presentation: | Poster |
| Abstract Category : | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract : | Over the last few decades, there has been considerable interest in the massive compact stars:
neutron stars and white dwarfs, prompted by many direct and indirect observations. For neutron
stars, the interest gravitates from the pulsar observations: PSR J1614-2230, PSR J0348+0432,
PSR J0740+6620, PSR J0952-0607, all of them exhibiting mass more than 2 Msun. On the other hand, several overluminous peculiar type Ia supernovae, e.g. SNLS-03D3bb, argue their respective progenitor to be a significantly super-Chandrasekhar white dwarf with a super-Chandrasekhar mass-limit. In addition, the gravitational wave observation GW190814 argues for a plausible neutron star with a mass of about 2.6 Msun. Our group, for more than a decade, has been actively working on the theoretical possibility of massive compact stars, more massive than their conventional value/limit. One of the well-tested avenues considered towards it is through the presence of star's magnetic field. In this work, we numerically simulate the evolution of magnetized main sequence stars of mass less than or equal to 10 Msun, passing through various phases including AGB, and leading to magnetized white dwarfs. We implement one-dimensional stellar evolution codes, STARS and MESA, both with their appropriate modification including magnetic fields and cooling, towards this venture. On several occasions, our simulation exhibits stable super-Chandrasekhar magnetized white dwarfs as the end-product of the evolution. We also explore appropriate field decay and the subsequent fate of the star, which might indeed lead to the over-luminous type Ia supernova. |
