Results 31 to 40 of about 10,420 (207)

Improved Detection Rates for Close Binaries Via Astrometric Observations of Gravitational Microlensing Events [PDF]

, 1999
In addition to constructing a Galactic matter mass function free from the bias induced by the hydrogen-burning limit, gravitational microlensing allows one to construct a mass function which is less affected by the problem of unresolved binaries (Gaudi &
Alard C., Ansari R., Ansari R., Cheongho Han, Dominik M., Duquennoy A., Kroupa P., Kyongae Chang, Paczynski B., Schneider P., Udalski A., Witt H., Zhao H.   +12 more
core   +3 more sources

OGLE-2019-BLG-1180Lb: Discovery of a Wide-orbit Jupiter-mass Planet around a Late-type Star

The Astronomical Journal, 2023
We report on the discovery and analysis of the planetary microlensing event OGLE-2019-BLG-1180 with a planet-to-star mass ratio q ∼ 0.003. The event OGLE-2019-BLG-1180 has unambiguous cusp-passing and caustic-crossing anomalies, which were caused by a ...
Sun-Ju Chung, Andrzej Udalski, Jennifer C. Yee, Andrew Gould, Leading Authors, Michael D. Albrow, Youn Kil Jung, Kyu-Ha Hwang, Cheongho Han, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, Hongjing Yang, Weicheng Zang, Sang-Mok Cha, Dong-Jin Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, The KMTNet collaboration, Radek Poleski, Przemek Mróz, Jan Skowron, Michał K. Szymański, Igor Soszyński, Paweł Pietrukowicz, Szymon Kozłowski, Krzysztof Ulaczyk, Krzysztof A. Rybicki, Patryk Iwanek, Marcin Wrona, Mariusz Gromadzki, The OGLE collaboration   +35 more
doaj   +1 more source

Gravitational microlensing and the galactic halo [PDF]

Physical Review D, 1996
By means of extensive galactic modeling we study the implications of the more than eighty microlensing events that have now been observed for the composition of the dark halo of the Galaxy, as well as for other properties of the Galaxy. We take the Galaxy to be comprised of luminous and dark disk components, a bulge, and a dark halo consisting of both ...
Gates, Evalyn I., Gyuk, Geza, Turner, Michael S.   +2 more
openaire   +3 more sources

Microlensing Events from Measurements of the Deflection Angle [PDF]

, 1996
Microlensing events are now regularly being detected by monitoring the flux of a large number of potential sources and measuring the combined magnification of the images.
Hog E., Jordi Miralda-Escudé, Marley M. S., Paczynski B., Refsdal S., Shao M., Turon C., Udalski A.   +7 more
core   +2 more sources

Gravitational microlensing as a test of stellar model atmospheres [PDF]

, 2002
We present calculations illustrating the potential of gravitational microlensing to discriminate between classical models of stellar surface brightness profiles and the recently computed ``Next Generation'' models of Hauschildt et al.
Albrow, Albrow, Bogdanov, Bontz, Claret, D. Valls-Gabaud, Davis, Gould, Gould, H. M. Bryce, Hauschildt, Hauschildt, Heyrovský, M. A. Hendry, Nemiroff, Orosz, Simmons, Valls-Gabaud, Van Hamme, Witt, Witt, Wittkowski   +21 more
core   +3 more sources

Blending in Gravitational Microlensing Experiments: Source Confusion And Related Systematics [PDF]

, 2007
Gravitational microlensing surveys target very dense stellar fields in the local group. As a consequence the microlensed source stars are often blended with nearby unresolved stars.
Afonso, Alard, Albrow, Alcock, Alcock, Alcock, Alcock, Alcock, Alcock, Binney, Bond, Buchalter, Dominik, Evans, Evans, Gaudi, Goldberg, Goldberg, Gould, Gould, Gould, Hamadache, Han, Han, Han, Han, Han, Holtzman, James, Jaroszyński, Jaroszyński, Jiang, Kamionkowski, Kim, Kozłowski, Mao, Mao, Martin C. Smith, Nemiroff, Paczyński, Palanque-Delabrouille, Park, Poindexter, Popowski, Przemysław Woźniak, Rattenbury, Schechter, Shude Mao, Smith, Smith, Smith, Sumi, Sumi, Sumi, Takahiro Sumi, Udalski, Udalski, Udalski, Udalski, Witt, Wood, Woźniak, Woźniak, Woźniak, Woźniak, Zhao   +65 more
core   +2 more sources

Detecting Multiplanetary Systems with Gravitational Microlensing and the Roman Space Telescope

The Astronomical Journal, 2023
It is plausible that most of the Stars in the Milky Way Galaxy, like the Sun, consist of planetary systems, instead of a single planet. Out of the estimately discovered 3980 planet-hosting stars, about 860 of them are known to be multiplanetary systems ...
Hossein Fatheddin, Sedighe Sajadian
doaj   +1 more source

Compressive Sensing Based Space Flight Instrument Constellation for Measuring Gravitational Microlensing Parallax

Signals, 2022
In this work, we provide a compressive sensing architecture for implementing on a space based observatory for detecting transient photometric parallax caused by gravitational microlensing events.
Asmita Korde-Patel, Richard K. Barry, Tinoosh Mohsenin   +2 more
doaj   +1 more source

Real-Time Detection Of Gravitational Microlensing [PDF]

Symposium - International Astronomical Union, 1996
Real-time detection of microlensing has moved from proof of concept in 1994 (Udalski et al. 1994a, Alcock et al. 1994) to a steady stream of events this year. Global dissemination of these events by the MACHO and OGLE collaborations has made possible intensive photometric and spectroscopic follow up from widely dispersed sites confirming the ...
Pratt, M. R., Alcock, C., Allsman, R. A., Alves, D., Axelrod, T. S., Becker, A., Bennett, D. P., Cook, K. H., Freeman, K. C., Griest, K., Guern, J., Lehner, M., Marshall, S. L., Peterson, B. A., Quinn, P. J., Reiss, D., Rodgers, A. W., Stubbs, C., Sutherland, W., Welch, D.   +19 more
openaire   +2 more sources

Gravitational Microlensing near Caustics. I. Folds [PDF]

The Astrophysical Journal, 2002
37 pages, 7 figures. Revised version includes an expanded discussion of applications. Accepted to ApJ, to appear in the August 1, 2002 issue (v574)
Gaudi, B. Scott, Petters, A. O.
openaire   +2 more sources