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Limits on the abundance of galactic planets from 5 years of PLANET observations
journal contribution
posted on 2023-05-16, 12:55 authored by Albrow, MD, An, J, Jean-Philippe BeaulieuJean-Philippe Beaulieu, Caldwell, JAR, DePoy, DL, Dominik, M, Gaudi, BS, Gould, A, Greenhill, JG, Kym HillKym Hill, Kane, S, Martin, R, Menzies, J, Naber, RM, Pel, JW, Pogge, RW, Pollard, KR, Sackett, PD, Sahu, KC, Vermaak, P, Vreeswijk, PM, Watson, RD, Williams, AWe search for signatures of planets in 43 intensively monitored microlensing events that were observed between 1995 and 1999. Planets would be expected to cause a short-duration (∼1 day) deviation on the smooth, symmetric light curve produced by a single lens. We find no such anomalies and infer that less than one-third of the ∼0.3 M ⊙ stars that typically comprise the lens population have Jupiter mass companions with semimajor axes in the range of 1.5 AU < a < 4 AU. Since orbital periods of planets at these radii are 3-15 yr, the outer portion of this region is currently difficult to probe with any other technique.
History
Publication title
The Astrophysical JournalVolume
556Pagination
L113-L116ISSN
0004-637XDepartment/School
School of Natural SciencesPublisher
The University of Chicago PressPlace of publication
ChicagoRepository Status
- Restricted