Decaying Neutrinos and Large-Scale Structure Formation

Bharadwaj, Somnath; Sethi, S.K.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4898

Full metadata record

DC Field	Value	Language
dc.contributor.author	Bharadwaj, Somnath	-
dc.contributor.author	Sethi, S.K.	-
dc.date.accessioned	2012-07-14T09:07:48Z	-
dc.date.available	2012-07-14T09:07:48Z	-
dc.date.issued	1998	-
dc.identifier.citation	Astrophysical Journal Supplement Series, 1998, Vol.114, p37	en
dc.identifier.issn	0067-0049	-
dc.identifier.issn	1538-4365 (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/4898	-
dc.description	Restricted Access	en
dc.description.abstract	We study the growth of density perturbations in a universe with unstable dark matter particles. The mass (m nu ) range 30 eV <= m nu <= 10 keV with lifetimes (td) in the range 107 s <= td <= 1016 s are considered. We calculate the COBE normalized matter power spectrum for these models. We find that it is possible to construct models consistent with observations for masses m nu > 50 eV by adjusting td so as to keep the quantity m2_ν({keV})td({yr}) constant at a value around 100. For m nu <= 1 keV, the power spectrum has extra power at small scales that could result in an early epoch of galaxy formation. We do not find any value of td that gives a viable model in the mass range m nu <= 50 eV. We also consider the implications of radiatively decaying neutrinos--models in which a small fraction B << 1 of neutrinos decay into photons--that could possibly ionize the intergalactic medium (IGM) at high redshift. We show that the parameter space of decaying particles that satisfies the IGM observations does not give viable models of structure formation.	en
dc.language.iso	en	en
dc.publisher	Institute of Physics	en
dc.relation.uri	http://adsabs.harvard.edu/abs/1998ApJS..114...37B	en
dc.relation.uri	http://arxiv.org/abs/astro-ph/9707143	en
dc.relation.uri	http://dx.doi.org/10.1086/313065	en
dc.rights	1998 The American Astronomical Society	en
dc.title	Decaying Neutrinos and Large-Scale Structure Formation	en
dc.type	Article	en
Appears in Collections:	Research Papers (A&A)

Files in This Item:

File	Description	Size	Format
1998_Astro Jour Suppliment Ser_Vol.114_p37.pdf Restricted Access	Restricted Access	712.96 kB	Adobe PDF	View/Open Request a copy

Show simple item record