Conformable fractional isothermal gas spheres

نویسندگان

چکیده

The isothermal gas sphere is well known as a powerful tool to model many problems in astrophysics, physics, chemistry, and engineering. This singular differential equation has not an exact solution solved only by numerical approximate methods. In the present paper within framework of Newtonian hydrostatic equilibrium, we have developed general analytical formulations for fractional sphere. To obtain expressions mass, radius, density, besides sphere, used conformable calculus. Using series expansion method, obtained recurrences relation, which allows us determine coefficients. comparison with ones parameter α=1 good dimensionless up x ≃ 3.2, beyond this value, diverges. We applied combination Euler-Abel Pade techniques accelerate series, therefore accelerated converge desired value. analyzed some physical parameters typical neutron stars such mass-radius pressure ratio different models. found that current models had smaller volumes masses than both context modified Rienmann-Liouville derivatives integer one.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Ostrowski type inequalities involving conformable fractional integrals

In the article, we establish several Ostrowski type inequalities involving the conformable fractional integrals. As applications, we find new inequalities for the arithmetic and generalized logarithmic means.

متن کامل

Conformable fractional Dirac system on time scales

We study the conformable fractional (CF) Dirac system with separated boundary conditions on an arbitrary time scale [Formula: see text]. Then we extend some basic spectral properties of the classical Dirac system to the CF case. Eventually, some asymptotic estimates for the eigenfunction of the CF Dirac eigenvalue problem are obtained on [Formula: see text]. So, we provide a constructive proced...

متن کامل

Multi-step conformable fractional differential transform method for solving and stability of the conformable fractional differential systems

‎In this article‎, ‎the multi-step conformable fractional differential transform method (MSCDTM) is applied to give approximate solutions of the conformable fractional-order differential systems‎. ‎Moreover‎, ‎we check the stability of conformable fractional-order L\"{u} system with the MSCDTM to demonstrate the efficiency and effectiveness of the proposed procedure.

متن کامل

Multi-step conformable fractional differential transform method for solving and stability of the conformable fractional differential systems

In this article‎, ‎the multi-step conformable fractional differential transform method (MSCDTM) is applied to give approximate solutions of the conformable fractional-order differential systems‎. ‎Moreover‎, ‎we check the stability of conformable fractional-order L"{u} system with the MSCDTM to demonstrate the efficiency and effectiveness of the proposed procedure.

متن کامل

Gravitational instability of finite isothermal spheres

We investigate the stability of bounded self-gravitating systems in the canonical ensemble by using a thermodynamical approach. Our study extends the earlier work of Padmanabhan [ApJ Supp. 71, 651 (1989)] in the microcanonical ensemble. By studying the second variations of the free energy, we find that instability sets in precisely at the point of minimum temperature in agreement with the theor...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: New Astronomy

سال: 2021

ISSN: ['1384-1076', '1384-1092']

DOI: https://doi.org/10.1016/j.newast.2020.101511