164 citations · 264 across the 14 of their papers we have counts for
14 papers
History of Globulettes in the Milky Way
Tiia Grenman, Erik Elfgren, Hans Weber
Globulettes are small (radii kAU) dark dust clouds, seen against the background of bright nebulae. A majority of the objects have planetary mass. These objects may be a sour…
Dusty globules in the Crab Nebula
Tiia Grenman, Gösta F. Gahm, Erik Elfgren
From existing broad-band images obtained with the Hubble Space Telescope, we located 92 globules, for which we derived positions, dimensions, orientations, extinctions, masses, pro…
Are there indications of compositeness of leptons and quarks in CERN LEP data?
Erik Elfgren, Sverker Fredriksson
The ``preon-trinity'' model for the compositeness of leptons, quarks and heavy vector bosons predicts several new heavy leptons and quarks. Three of them can be produced in $e^{+}e…
Using Monte Carlo to optimize variable cuts
Erik Elfgren
A Monte Carlo method to optimize cuts on variables is presented and evaluated. The method gives a much higher signal to noise ratio than does a manual choice of cuts.
Mass limits for heavy neutrinos
Erik Elfgren, Sverker Fredriksson
Neutrinos heavier than GeV are not excluded by particle physics data. Stable neutrinos heavier than this might contribute to the cosmic gamma ray background through…
Dust Distribution during Reionization
Erik Elfgren, Francois-Xavier Désert, Bruno Guiderdoni
The dust produced by the first generation of stars will be a foreground to cosmic microwave background. In order to evaluate the effect of this early dust, we calculate the power s…