Results 91 to 100 of about 10,480 (204)

GRAVITATIONAL MICROLENSING AND EXTENDED SOURCE MODELS

Odessa Astronomical Publications, 2014
We perform statistical simulations of light curves of extended microlensed sources having different brightness distribution in the source plane. We generated a set of realizations of lensing point mass system that takes into account an external shear ...
V. M. Sliusar, V. I. Zhdanov
doaj   +1 more source

Fractal Algorithm for Multiple-lens Analyses

The Astrophysical Journal
A microlensing exoplanet search is a unique method for finding planets orbiting distant stars. However, in the past, the method used to analyze microlensing data could not deal with complex lens systems. The number of lenses was limited to three or less.
F. Abe
doaj   +1 more source

Gravitational Microlensing by Globular Clusters [PDF]

, 1998
Stars in globular clusters can act either as sources for MACHOs (Massive Astrophysical Compact Halo Objects) located along the line of sight or as lenses for more distant background stars.
Jetzer, P., Strässle, M., Wandeler, U.
core   +1 more source

Compact object detection in self-lensing binary systems with a main-sequence star

, 2010
Detecting compact objects by means of their gravitational lensing effect on an observed companion in a binary system has already been suggested almost four decades ago.
A. Mehrabi, Abe, Afonso, Albrow, Belczynski, Bennett, Bennett, Beskin, Bozza, Bozza, Campbell, Chabrier, Chandrasekhar, Cunningham, Demircan, Dominik, Dominik, Dyson, Einstein, Einstein, Gould, Gould, Hurley, Hwang, Jørgensen, Kleinman, M. Dominik, Maeder, Mao, Mathieu, Milsztajn, Paczyński, Popowski, Rahvar, S. Rahvar, Sumi, Udalski, Weber, Witt   +38 more
core   +1 more source

Gravitational microlensing—A report on the MACHO project [PDF]

Reviews of Modern Physics, 1999
There is abundant evidence that the mass of the Universe is dominated by dark matter of unknown form. The MACHO project is one of several teams searching for the dark matter around our Galaxy in the form of Massive Compact Halo Objects (MACHOs).
openaire   +2 more sources

Casting Light on Degeneracies: A Comprehensive Study of Lightcurve Variations in Microlensing Events OGLE-2017-BLG-0103 and OGLE-2017-BLG-0192

The Astronomical Journal
This study investigates orbital parallax in gravitational microlensing events, focusing on OGLE-2017-BLG-0103 and OGLE-2017-BLG-0192. For events with timescales ≤60 days, a Jerk-Parallax degeneracy arises due to high Jerk velocity ( $\tilde{{v}_{j ...
Sarang Shah
doaj   +1 more source

Cosmological distance indicators

, 2018
We review three distance measurement techniques beyond the local universe: (1) gravitational lens time delays, (2) baryon acoustic oscillation (BAO), and (3) HI intensity mapping.
A. Agnello, A. Eigenbrod, A. Goobar, A. Hojjati, A. Hojjati, A. More, A. Oscoz, A.G. Riess, A.M. Martin, A.S. Tagore, B.J. Brewer, C. Alcock, C. Grillo, C. Hazard, C. McCully, C. Vanderriest, C. Vuissoz, C. Vuissoz, C.D. Fassnacht, C.D. Fassnacht, C.D. Fassnacht, C.E. Rusu, C.L. Bennett, C.S. Kochanek, C.S. Kochanek, C.W. Morgan, D. Paraficz, D. Sluse, D. Walsh, D.A. Goldstein, D.A. Goldstein, D.H. Weinberg, D.J. Eisenstein, D.J. Eisenstein, E. Eulaers, E. Giannini, E. Jullo, E.E. Falco, E.O. Ofek, E.R. Switzer, F. Courbin, F. Courbin, F. Courbin, F.B. Abdalla, G. Dobler, G. Dobler, G. Efstathiou, G. Golse, G.C.F. Chen, H. Lin, H.J. Seo, H.J. Seo, I. Burud, I. Burud, I. Burud, I. Jee, I. Momcheva, J. Fohlmeister, J. Fohlmeister, J. Hjorth, J. Huchra, J. Lehar, J.R. Shaw, J.R. Shaw, J.W. Nightingale, K. Bandura, K. Liao, K.C. Wong, K.S. Dawson, K.W. Masui, K.W. Masui, L. Amendola, L. Anderson, L. Oldham, L.B. Newburgh, L.J. Hainline, L.L.R. Williams, L.V.E. Koopmans, L.V.E. Koopmans, L.V.E. Koopmans, L.V.E. Koopmans, M. Barnabè, M. Barnabè, M. Cappellari, M. Jauzac, M. Oguri, M. Oguri, M. Oguri, M. Schmidt, M. Sereno, M. Takada, M. Tegmark, M. Tegmark, M. Tewes, M. Tewes, M.A. Zwaan, M.J. Drinkwater, N. Cantale, N. Kaiser, N.A. Grogin, O. Wucknitz, P. Bull, P. Jakobsson, P. Magain, P. Magain, P. Saha, P. Schneider, P. Schneider, P. Schneider, P. Schneider, P. Young, P.A.R. Ade, P.J. Marshall, P.J.E. Peebles, P.L. Kelly, P.L. Kelly, P.L. Kelly, P.L. Schechter, R. Adam, R. Barkana, R. Blandford, R. Blandford, R. Fadely, R. Gavazzi, R. Kawamata, R. Kormann, R.B. Wayth, S. Birrer, S. Cole, S. Dye, S. Hilbert, S. Rathna Kumar, S. Rathna Kumar, S. Refsdal, S. Vegetti, S. Wallington, S. Wyithe, S.A. Rodney, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.J. Warren, S.S. Tie, T. Kundić, T. Matsubara, T. Okumura, T. Okumura, T. Treu, T.C. Chang, T.C. Chang, T.E. Collett, V. Bonvin, V. Bonvin, V.N. Shalyapin, W. Hu, W.L. Freedman, W.N. Colley, X. Fernández, Y. Xu, Y.W. Liao, Z.S. Greene, É. Aubourg   +166 more
core   +1 more source

Influence of Microlensing on Spectral Anomalies of the Lensed Objects

Open Astronomy, 2011
Here we consider the influence of microlensing on the spectrum of a lensed object with the angular size 5 μas accepting that the composite emission of this object originates from three different regions arranged around its center.
Simić S., Popović L. Č., Jovanović P.   +2 more
doaj   +1 more source

How Rare Are TESS Free-floating Planets?

The Astrophysical Journal Letters
Recently, Kunimoto et al. claimed that a short-lived signal in the Transiting Exoplanet Survey Satellite (TESS) Sector 61 database was possibly caused by a microlensing event with a terrestrial-mass free-floating planet (FFP) lens.
Hongjing Yang, Weicheng Zang, Tianjun Gan, Renkun Kuang, Andrew Gould, Shude Mao   +5 more
doaj   +1 more source

Gravitational microlensing in Verlinde's emergent gravity

Physics Letters B, 2017
We propose gravitational microlensing as a way of testing the emergent gravity theory recently proposed by Eric Verlinde [1]. We consider two limiting cases: the dark mass of maximally anisotropic pressures (Case I) and of isotropic pressures (Case II ...
Lei-Hua Liu, Tomislav Prokopec
doaj   +1 more source