A search for stellar obscuration events due to dark clouds

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dc.contributor.authorDrake, AJ
dc.contributor.authorCook, KH
dc.date.accessioned2025-01-21T01:09:22Z
dc.date.available2025-01-21T01:09:22Z
dc.date.issued2003
dc.description.abstractThe recent detections of a large population of faint submillimeter sources, an excess halo gamma-ray background, and the extreme scattering events observed for extragalactic radio sources have been explained as being due to baryonic dark matter in the form of small, dark gas clouds. In this paper, we present the results of a search for the transient stellar obscurations such clouds are expected to cause. We examine the MACHO project light curves of 48 x 10(6) stars toward the Galactic bulge, Large Magellanic Cloud, and Small Magellanic Cloud for the presence of dark cloud extinction events. We find no evidence for a population of dark gas clouds with A(V) > 0.2 in the masses range from similar to10(-4) to 2 x 10(-2) M-., in either the Galactic disk or halo. However, it is possible that such dark cloud populations could exist if they are clustered in regions away from the observed lines of sight.
dc.fuente.origenWOS
dc.identifier.issn0004-637X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96575
dc.identifier.wosidWOS:000182943500023
dc.issue.numero1
dc.language.isoen
dc.pagina.final288
dc.pagina.inicio281
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.subjectdark matter
dc.subjectdust, extinction
dc.subjectGalaxy : halo
dc.subjectISM : clouds
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleA search for stellar obscuration events due to dark clouds
dc.typeartículo
dc.volumen589
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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