A.M. Mourao, Jose P. S. Lemos, Ana M. Mourao, Luis Teodoro,'s Astronomy and astrophysics: recent developments: proceedings PDF

By A.M. Mourao, Jose P. S. Lemos, Ana M. Mourao, Luis Teodoro, Roberto Ugoccioni

ISBN-10: 9810246994

ISBN-13: 9789810246990

This quantity discusses a number of the fresh theoretical and observational advancements that experience major implications for astronomy and astrophysics. the most subject matters are (i) cosmology, (ii) gravitational wave astronomy and gravitational physics, (iii) stellar astrophysics, and (iv) lively galactic nuclei and disk accretion. There also are contributions at the sun procedure.

Show description

Read or Download Astronomy and astrophysics: recent developments: proceedings of the 10th Portuguese meeting: CENTRA, Lisbon, Portugal, 27-28 July 2000 PDF

Best physics books

Get Finite element analysis: thermomechanics of solids PDF

Finite aspect modeling has built into the most vital instruments at an engineer's disposal, specifically in purposes regarding nonlinearity. whereas engineers dealing with such functions can have entry to strong desktops and finite point codes, too frequently they lack the robust starting place in finite aspect research (FEA) that nonlinear difficulties require.

Download PDF by W. H. T. Loh (auth.), W. H. T. Loh (eds.): Re-entry and Planetary Entry Physics and Technology: I /

Over the last decade, a speedy development of data within the box of re-entry and planetary access has ended in many major advances necessary to the scholar, engineer and scientist. the aim of supplying this direction is to make to be had to them those contemporary major advances in physics and know-how.

Extra info for Astronomy and astrophysics: recent developments: proceedings of the 10th Portuguese meeting: CENTRA, Lisbon, Portugal, 27-28 July 2000

Example text

The magnitude of ac is plotted in Fig. 24 as a function of nucleus size and heliocentric distance. There are many weaknesses in this simple calculation and many papers have been written to refine it since Whipple’s (1950) classic exposition. Still, the essential point is that very large particles, if they exist in the nucleus, Kuiper Belt and Comets: An Observational Perspective 41 Fig. 24. 04) sublimating water ice nuclei as a function of heliocentric distance for nucleus radii from 1 to 100 km (as marked).

The model also predicts that the range of colors observed should vary with KBO size, because the timescale for collisional resurfacing varies with object size while τcr does not. Again, this violates the observations. The model has been extended by the addition of color variations owing to possible outgassing effects [31] but the problems remain. Collisional resurfacing is unlikely to be responsible for the color dispersion of the KBOs, although it could conceivably be a contributing factor. Tegler and Romanishin reported that the colors of KBOs were not just dispersed over a wide range but were bimodally distributed [145].

In STM, the thermal emission is assumed to emanate from a spherical body in which the surface temperature is set by instantaneous equilibrium with sunlight and where the effects of rotation are unimportant. This could mean that the surface heat retention is very small, so that heat is lost before rotation carries it away from the day-side, or it could mean that the rotation vector points exactly at the Sun, so that rotation does not change the surface heating pattern. 01 50 100 150 200 250 300 Radius [km] Fig.

Download PDF sample

Astronomy and astrophysics: recent developments: proceedings of the 10th Portuguese meeting: CENTRA, Lisbon, Portugal, 27-28 July 2000 by A.M. Mourao, Jose P. S. Lemos, Ana M. Mourao, Luis Teodoro, Roberto Ugoccioni


by Daniel
4.2

Rated 4.24 of 5 – based on 7 votes