We study the implications for NGC 891 of the decaying Dark matter (DDM) hypothesis which states that dark matter decays into hydrogen-ionizing photons on a time-scale of 1023 s. We are able to derive many details of the observed Hα emission of this galaxy using only its rotation curve and properties of our own very similar Galaxy. We also use the hypothesis to determine the distance and the peculiar velocity of NGC 891 and obtain agreement with an independent estimate of those quantities. The detailed agreement of the consequences of the DDM hypothesis with observations of NGC 891 provides strong support for this hypothesis. (author)
Dark Matter Decay and the Spiral Galaxy NGC891 / Sciama, D. W.; Salucci, P.. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 247:3(1990), pp. 506-509.
Dark Matter Decay and the Spiral Galaxy NGC891
Salucci, P.
1990-01-01
Abstract
We study the implications for NGC 891 of the decaying Dark matter (DDM) hypothesis which states that dark matter decays into hydrogen-ionizing photons on a time-scale of 1023 s. We are able to derive many details of the observed Hα emission of this galaxy using only its rotation curve and properties of our own very similar Galaxy. We also use the hypothesis to determine the distance and the peculiar velocity of NGC 891 and obtain agreement with an independent estimate of those quantities. The detailed agreement of the consequences of the DDM hypothesis with observations of NGC 891 provides strong support for this hypothesis. (author)I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
