Paris, 1 mar ( EFE).-A team of astronomers has been observed changes more rapidly than expected in the brightness of stars embryonic stem cells in the core of the nebula of Orion, the European Space Agency (ESA) announced today.
Images – obtained by the Spitzer of American NASA and ESA – Herschel telescopes showed in detail the stars in the Nebula formation Orion, one of the few observable to the naked seen by amateur astronomers, according to a statement.
Astronomers were surprised to discover that younger objects brightness varied up to 20% in a matter of weeks, as the process of accretion can last for years or even centuries, and “now are trying to find an explanation for this unusual phenomenon”, he added that the.
Stars are created when a dense cloud of dust and gas becomes a central core or protostar surrounded by an accretion disc (disc that surrounds a central massive object and feeds it).
Over thousands of years, the disk will fall attracted by the protostar until it reaches enough density to merge and become a star matures.
The Herschel telescope, in an investigation led by the Institute of millimeter radio astronomy (IRAM) in Granada (Spain), discovered particles of cold in the disks of young protostars to observe them in the far-infrared band.
These data were combined with archive images taken by Spitzer in the band of the infrared means that distinguished older formations and at a higher temperature, which showed variations in the brightness of objects according to their seniority.
The scientists think that the phenomenon now detected the highest speed appreciated the changes may be due to the presence of gas filaments that channel material from the external disk to the region closer to the star, which would cause this brillase.
But also provide for the possibility of that is due to the accumulation of cold material in the inner rim of the disc, which cast shadows on the outer region and oscurecerÃa it temporarily. EFE
