Indonesian University Space Research Association

Indonesian University Space Research Association

Persatuan Universitas Riset Antariksa di Indonesia

IUSRA is an independent, nonprofit research corporation where the combined efforts of in-house talent and university-based expertise merge to advance space science and technology. 

STRENGTHS & CAPABILITIES Today and Future, IUSRA works across a wide spectrum of disciplines stemming from the range of challenges originally posed by the space program. From biomedicine to astrophysics, from basic research to facility management and operations, IUSRA is helping enable the study of the Universe from ground, airborne, and orbiting observatories, the study of Earth from space-based platforms, the development of advanced technologies for complex spacecraft, the human exploration of space by astronauts, and much more.

IUSRA Future VISION

The IUSRA business paradigm is to engage the creativity and authoritative expertise of university faculty and their students and deliver to customers sophisticated, forward-looking solutions, on schedule and within budget.

IUSRA objectively focuses on sponsor needs in these key areas:
 * Fundamental Research
 * Engineering & Technology Development
 * Operations & Management
 * Workforce Development

Universities are also a part of IUSRA's governance structure. 500 universities, all major research institutions, provide oversight solely as a public service. All IUSRA activities are conducted without bias or preference.

Neutrino radiation from dense matter

Armen Sedrakian
Institute for Theoretical Physics,
T¨ubingen University, D-72076 T¨ubingen, Germany
February 5, 2008
Abstract
This article provides a concise review of the problem of neutrino radiation from dense matter.
The subjects addressed include quantum kinetic equations for neutrino transport, collision integrals
describing neutrino radiation through charged and neutral current interactions, radiation rates from
pair-correlated baryonic and color superconducting quark matter.

http://arxiv.org/pdf/astro-ph/0701017.pdf

Evolution of spiral galaxies in modified gravity

By: O. Tiret and F. Combes
Observatoire de Paris, LERMA, 61 Av. de l’Observatoire, F-75014, Paris, France
Received 26/09/2006/ 08/12/2006

ABSTRACT

We compare N-body simulations of isolated galaxies performed in both frameworks of modified Newtonian dynamics (MOND) and Newtonian gravity with dark matter (DM). We have developed a multigrid code able to efficiently solve the modified Poisson equation derived from the Lagrangian formalism AQUAL. We take particular care of the boundary conditions that are a crucial point in MOND. The 3-dimensional dynamics of initially identical stellar discs is studied in both models. In Newtonian gravity the live DM halo is chosen to fit the rotation curve of the MOND galaxy. For the same value of the Toomre parameter (QT ), galactic discs in MOND develop a bar instability sooner than in the DM model. In a second phase the MOND bars weaken while the DM bars continue to grow by exchanging angular momentum with the halo. The bar pattern speed evolves quite differently in the two models: there is no dynamical friction on the MOND bars so they keep a constant pattern speed while the DM bars slow down significantly. This
affects the position of resonance like the corotation and the peanut. The peanut lobes in the DM model move radially outward while they keep the same position in MOND. Simulations of (only stellar) galaxies of different types on the Hubble sequence lead to a statistical bar frequency that is closer to observations for the MOND than the DM model. Key words. Galaxies: general — Galaxies: kinematics and dynamics — Galaxies: spiral — Galaxies: structure — Cosmology: dark matter

http://arxiv.org/pdf/astro-ph/0701011.pdf