| Full text | |
| Author(s): |
Raga, A. C.
;
Osorio-Caballero, J. A.
;
Chan, R. S.
;
Esquivel, A.
;
Rodriguez-Gonzalez, A.
;
Lora, V
;
Rodriguez Ramirez, J. C.
Total Authors: 7
|
| Document type: | Journal article |
| Source: | REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA; v. 56, n. 1, p. 8-pg., 2020-04-01. |
| Abstract | |
We study self-gravitating, hydrostatic spheres with a polytropic equation of state P proportional to rho(gamma) (where gamma is the specific heat ratio of the gas), considering structures with gamma approximate to 1 as a model for molecular cloud cores with small departures from isothermality. We derive the properties (i.e., mass, radius and center to edge density ratio) as a function of gamma for the maximal stable sphere through an application of \Bonnor's stability criterion". We find that in the gamma = 1 -> 4/3 range the mass of the maximal sphere (for a given central temperature) is almost constant, and that its radius and center to edge density ratio are growing functions of gamma. We therefore have maximal stable, self-gravitating spheres with similar masses, but with increasing center to edge density contrasts for increasing departures from isothermality. (AU) | |
| FAPESP's process: | 17/12188-5 - Study of relativistic particles and high energy emissions around black hole and jet sources through MHD, particle-in-cell (PIC) and radiative transfer |
| Grantee: | Juan Carlos Rodríguez Ramírez |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |