Ext. 2612

jmramirez@yachaytech.edu.ec

Short Bio

Jose Manuel was born in Caracas Venezuela. He obtained his undergraduate Physics degree at the University of Carabobo (Venezuela) in 2000 (first of class). Then he attended to a PhD program created between the Instituto Venezolano de Investigaciones Científicas (IVIC) and the High Energy Laboratory of the NASA’s Goddard Space Flight Center in Maryland EEUU, with mentoring of Timothy Kalman and Claudio Mendoza’s group. Then earned a fellow in Germany (2006-2008) to work on X-ray Astronomy at the Max Planck Institute for Extraterrestrial Physics, and later at the Astrophysics Institute of Potsdam (2008-2011) to collaborate in the XMM Newton’s operational center of the European Spacial Agency (ESA).

He went back to Venezuela in 2012 to lead the Computational Physics laboratory at IVIC (reaching the level of Associate Researcher III) until 2017, where he has been actively collaborating with scientific groups around the world like EEUU, Germany, Mexico (CINVESTAV) and Ecuador.

Summary of Interests:

1. Xray Astronomy of Active Galactic Nuclei
2. High resolution spectroscopy of the Interstellar medium and Xray Binaries.
3. SPH simulation of accreting material i Supermassive Black Holes.
4. Gravitational colapses of Protostelar clouds.
5. Gravitational Waves Computational Description.

Current Research Projects

I am in charge of the IMPETUS project, aim at computing accretion and radiative properties of compact objects using the super computer ABACUS from the CINVESTAV, Mexico (collaborating with Professors Jaime Klapp and Leonardo Sigalotti).

Selected publications

A New Comprehensive 2-D Model of the Point Spread Functions of the XMM-Newton EPIC Telescopes: Spurious Source Suppression and Improved Positional Accu…
AM Read, SR Rosen, RD Saxton, J Ramirez
Astronomy and Astrophysics 534 (A34), 1-13

Modeling the oxygen K absorption in the interstellar medium: an XMM-Newton view of Sco X-1
J Garcia, JM Ramírez, TR Kallman, M Witthoeft, MA Bautista, C Mendoza, …
The Astrophysical Journal Letters 731 (1), L15

Physical and kinematical properties of the X-ray absorber in the broad absorption line quasar APM 08279+ 5255
JM Ramírez
Astronomy and Astrophysics 489 (1), 57-68

Chandra LETGS observation of the variable NLS1 galaxy Ark 564
JM Ramírez
Astronomy & Astrophysics 551, A95

IMPETUS: New Cloudy’s radiative tables for accretion onto a galaxy black hole
JM Ramirez-Velasquez, J Klapp, R Gabbasov, F Cruz, LDG Sigalotti
ApJS 226 (2)

impetus: Consistent SPH calculations of 3D spherical Bondi accretion onto a black hole
JM Ramírez-Velasquez, LDG Sigalotti, R Gabbasov, F Cruz, J Klapp
Monthly Notices of the Royal Astronomical Society

From large-scale to protostellar disk fragmentation into close binary stars
LDG Sigalotti, F Cruz, R Gabbasov, J Klapp, J Ramírez-Velasquez
arXiv preprint arXiv:1803.09395

Black hole shadow of a rotating scale-dependent black hole
E Contreras, Á Rincón, G Panotopoulos, P Bargueño, B Koch
Physical Review D 101 (6), 064053 (2020)

Bondi accretion for adiabatic flows onto a massive black hole with an accretion disc-The one dimensional problem
JM Ramírez-Velásquez, LDG Sigalotti, R Gabbasov, J Klapp, E Contreras
Astronomy & Astrophysics 631, A13 (2019)

Bondi accretion for adiabatic flows onto a massive black hole with an accretion disc
JM Ramírez-Velásquez, LDG Sigalotti, R Gabbasov, J Klapp, E Contreras (2019)

Black hole shadow of a rotating polytropic black hole by the Newman–Janis algorithm without complexification
E Contreras, JM Ramirez–Velasquez, Á Rincón, G Panotopoulos, …
The European Physical Journal C 79 (9), 802 (2019)

SiO2 Electronic Structure in Gas Giants’ Planetary Cores: A Density Functional Theory Approach
JM Ramírez-Velásquez, JM Salazar
International Conference on Supercomputing in Mexico, 76-85 (2019)

Solution of Schrödinger Equation Not Implementing Conventional Separation of Variables: Using the Trial and Error Brute Force Permutation Method
JM Ramírez-Velásquez, I Villegas
International Conference on Supercomputing in Mexico, 96-107 (2019)

Three Body Problem Applied to the Helium Atom System: The Independent Electron Approximation (IEA)
JM Ramírez-Velásquez, JA Sanchez
International Conference on Supercomputing in Mexico, 86-95 (2019)

Radiative non-isothermal Bondi accretion onto a massive black hole
JM Ramirez-Velasquez, LDG Sigalotti, R Gabbasov, F Cruz, J Klapp, …
arXiv preprint arXiv:1902.00360 (2019)

Correction to: Astrophysical Fluids of Novae: High Resolution Pre-decay X-Ray Spectrum of V4743 Sagittarii
JM Ramírez-Velasquez
Recent Advances in Fluid Dynamics with Environmental Applications, C1-C1 (2019)

Relativistic dust accretion onto a scale-dependent polytropic black hole
E Contreras, Á Rincón, JM Ramírez-Velasquez
The European Physical Journal C 79 (1), 1-6 (2019)