Gravitational blueshift from a collapsing object

Gravitational blueshift from a collapsing object

We discuss a counterintuitive phenomenon of classical general relativity, in which a significant fraction of the radiation emitted by a collapsing object and detected by a distant observer may be blueshifted rather than redshifted. The key-point is that when the radiation propagates inside the colla...

Full description

Bibliographic Details
Main Authors: Lingyao Kong, Daniele Malafarina, Cosimo Bambi
Format: Article
Language:English
Published: Elsevier 2015-02-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269314008934
id doaj-57791ddb8f9141b589eeaa8b6f2bc5d6
record_format Article
spelling doaj-57791ddb8f9141b589eeaa8b6f2bc5d62020-11-24T21:59:58ZengElsevierPhysics Letters B0370-26932015-02-017418286Gravitational blueshift from a collapsing objectLingyao Kong0Daniele Malafarina1Cosimo Bambi2Center for Field Theory and Particle Physics & Department of Physics, Fudan University, 200433 Shanghai, ChinaCenter for Field Theory and Particle Physics & Department of Physics, Fudan University, 200433 Shanghai, ChinaCorresponding author.; Center for Field Theory and Particle Physics & Department of Physics, Fudan University, 200433 Shanghai, ChinaWe discuss a counterintuitive phenomenon of classical general relativity, in which a significant fraction of the radiation emitted by a collapsing object and detected by a distant observer may be blueshifted rather than redshifted. The key-point is that when the radiation propagates inside the collapsing body, it is blueshifted, and this time interval may be sufficiently long for the effect to be larger than the later redshift due to the propagation in the vacuum exterior, from the surface of the body to the distant observer. Unfortunately, the phenomenon can unlikely have direct observational implications, but it is interesting by itself as a pure relativistic effect.http://www.sciencedirect.com/science/article/pii/S0370269314008934
collection DOAJ
language English
format Article
sources DOAJ
author Lingyao Kong
Daniele Malafarina
Cosimo Bambi
spellingShingle Lingyao Kong
Daniele Malafarina
Cosimo Bambi
Gravitational blueshift from a collapsing object
Physics Letters B
author_facet Lingyao Kong
Daniele Malafarina
Cosimo Bambi
author_sort Lingyao Kong
title Gravitational blueshift from a collapsing object
title_short Gravitational blueshift from a collapsing object
title_full Gravitational blueshift from a collapsing object
title_fullStr Gravitational blueshift from a collapsing object
title_full_unstemmed Gravitational blueshift from a collapsing object
title_sort gravitational blueshift from a collapsing object
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2015-02-01
description We discuss a counterintuitive phenomenon of classical general relativity, in which a significant fraction of the radiation emitted by a collapsing object and detected by a distant observer may be blueshifted rather than redshifted. The key-point is that when the radiation propagates inside the collapsing body, it is blueshifted, and this time interval may be sufficiently long for the effect to be larger than the later redshift due to the propagation in the vacuum exterior, from the surface of the body to the distant observer. Unfortunately, the phenomenon can unlikely have direct observational implications, but it is interesting by itself as a pure relativistic effect.
url http://www.sciencedirect.com/science/article/pii/S0370269314008934
work_keys_str_mv AT lingyaokong gravitationalblueshiftfromacollapsingobject
AT danielemalafarina gravitationalblueshiftfromacollapsingobject
AT cosimobambi gravitationalblueshiftfromacollapsingobject
_version_ 1725846137754091520

Similar Items