Comment on Article: Search for primordial black holes called off
(Nature News) — “Astrophysicist Agnieszka Cieplak of Brookhaven National Laboratory in Upton, New York, an author of the 2013 study, notes that although the mass window is all but closed, there is still a very tiny gap at just under the mass of the Moon, as the lower limit of the earlier study does not quite touch the upper limit of the present one.”
http://www.nature.com/news/search-for-primordial-black-holes-called-off-1.14551
Synopsis: Planet Search Finds No Dark Matter Black Holes
(APS Physics News) — Dark matter remains such a mystery that we’re still unsure whether it’s made of microscopic particles or macroscopic bodies. On the “macro” side, dark matter could consist of relatively small black holes that formed in the early Universe. We might detect one of these so-called primordial black holes as gravitational lenses of background stars. A new analysis of data from the Kepler mission’s search for Earth-sized planets finds no black hole lensing events. From this nondetection, the researchers, reporting inPhysical Review Letters, rule out part of the mass range previously thought still available for dark matter black hole candidates…
http://physics.aps.org/synopsis-for/10.1103/PhysRevLett.111.181302
NASA satellite could reveal if primordial black holes are dark matter
(PhysOrg.com) — The primary objective of NASA’s Kepler satellite, which was launched in March 2009 to orbit the Sun, is to search for Earth-like planets in a portion of the Milky Way galaxy. But now a team of physicists has proposed that Kepler could have a second appealing purpose: to either detect or rule out primordial black holes (PBHs) of a certain mass range as the primary constituent of dark matter.
http://www.physorg.com/news/2011-12-nasa-satellite-reveal-primordial-black.html