Results 1 to 10 of about 11,068 (191)

New Constraints on Quasar Broad Absorption and Emission Line Regions from Gravitational Microlensing [PDF]

Frontiers in Astronomy and Space Sciences, 2017
Gravitational microlensing is a powerful tool allowing one to probe the structure of quasars on sub-parsec scale. We report recent results, focusing on the broad absorption and emission line regions.
Damien Hutsemékers, Lorraine Braibant, Dominique Sluse, Timo Anguita, René Goosmann   +4 more
doaj   +2 more sources

The gravitational mass of Proxima Centauri measured with SPHERE from a microlensing event [PDF]

, 2018
Proxima Centauri, our closest stellar neighbour, is a low-mass M5 dwarf orbiting in a triple system. An Earth-mass planet with an 11 day period has been discovered around this star.
Almenara, J. -M., Avenhaus, H., Desidera, S., Enia, A., Girard, J., Giro, E., Gluck, L., Gratton, R., Janson, M., Kervella, P., Lagadec, E., Langlois, M., Mesa, D., Milli, J., Perrot, C., Ramos, J., Roux, A., Sahu, K., Schlieder, J. -E., Thalmann, C., Vigan, A., Zurlo, A.   +21 more
core   +2 more sources

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

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   +2 more sources

Probing the effect of gravitational microlensing on the measurements of the Rossiter-McLaughlin effect [PDF]

, 2013
In general, in the studies of transit light-curves and the Rossiter-McLaughlin (RM), the contribution of the planet's gravitational microlensing is neglected.
Boué, G., Figueira, P., Haghighipour, N., Oshagh, M., Santos, N. C.   +4 more
core   +3 more sources

The First Model-independent Chromatic Microlensing Search: No Evidence in the Gravitational Wave Catalog of LIGO–Virgo–KAGRA

The Astrophysical Journal
The lensing of gravitational waves (GWs) due to intervening matter distribution in the Universe can lead to chromatic and achromatic signatures in the wave-optics and geometrical-optics limit, respectively.
Aniruddha Chakraborty, Suvodip Mukherjee
doaj   +2 more sources

Studies of relativistic effects with radioastron space mission [PDF]

Serbian Astronomical Journal, 2007
In the review we discuss possible studies of GR phenomena such as gravitational microlensing and shadow analysis with the forthcoming RadioAstron space mission.
Zakharov A.F.
doaj   +1 more source

MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert

The Astronomical Journal, 2023
We analyze the MOA-2020-BLG-208 gravitational microlensing event and present the discovery and characterization of a new planet, MOA-2020-BLG-208Lb, with an estimated sub-Saturn mass.
Greg Olmschenk, David P. Bennett, Ian A. Bond, Weicheng Zang, Youn Kil Jung, Jennifer C. Yee, Etienne Bachelet, Leading authors, Fumio Abe, Richard K. Barry, Aparna Bhattacharya, Hirosane Fujii, Akihiko Fukui, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Rintaro Kirikawa, Iona Kondo, Naoki Koshimoto, Yutaka Matsubara, Sho Matsumoto, Shota Miyazaki, Brandon Munford, Yasushi Muraki, Arisa Okamura, Clément Ranc, Nicholas J. Rattenbury, Yuki Satoh, Takahiro Sumi, Daisuke Suzuki, Taiga Toda, Paul J. Tristram, Aikaterini Vandorou, Hibiki Yama, The MOA Collaboration, Michael D. Albrow, Sang-Mok Cha, Sun-Ju Chung, Andrew Gould, Cheongho Han, Kyu-Ha Hwang, Dong-Jin Kim, Hyoun-Woo Kim, Seung-Lee Kim, Chung-Uk Lee, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, Yoon-Hyun Ryu, In-Gu Shin, Yossi Shvartzvald, The KMTNet Collaboration, Grant Christie, Tony Cooper, John Drummond, Jonathan Green, Steve Hennerley, Jennie McCormick, L. A. G. Monard, Tim Natusch, Ian Porritt, Thiam-Guan Tan, The MicroFUN Collaboration, Shude Mao, Dan Maoz, Matthew T. Penny, Wei Zhu, The MAP Follow-Up Collaboration, V. Bozza, Arnaud Cassan, Martin Dominik, Markus Hundertmark, R. Figuera Jaimes, K. Kruszyńska, K. A. Rybicki, R. A. Street, Y. Tsapras, Joachim Wambsganss, Ł. Wyrzykowski, P. Zieliński, The OMEGA Collaboration, Gioia Rau   +82 more
doaj   +1 more source

Optical and Near-infrared Continuum Emission Region Size Measurements in the Lensed Quasar FBQ J0951+2635

The Astrophysical Journal, 2023
We present 10 seasons of Sloan Digital Sky Survey r -band monitoring observations and five seasons of H -band observations of the two-image system FBQ J0951+2635 from the Kaj Strand Astrometric Reflector at the United States Naval Observatory, Flagstaff ...
Angelica B. Rivera, Christopher W. Morgan, Steven M. Florence, Scott E. Dahm, Frederick J. Vrba, Trudy M. Tilleman, Matthew A. Cornachione, Emilio E. Falco   +7 more
doaj   +1 more source

Mass Production of 2021 KMTNet Microlensing Planets II

The Astronomical Journal, 2023
We continue our program of publishing all planets (and possible planets) found by eye in 2021 Korea Microlensing Telescope Network (KMTNet) online data. We present four planets (KMT-2021-BLG-0712Lb, KMT-2021-BLG-0909Lb, KMT-2021-BLG-2478Lb, and KMT-2021 ...
Yoon-Hyun Ryu, In-Gu Shin, Hongjing Yang, Andrew Gould, Michael D. Albrow, Sun-Ju Chung, Cheongho Han, Kyu-Ha Hwang, Youn Kil Jung, Yossi Shvartzvald, Jennifer C. Yee, 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   +19 more
doaj   +1 more source

Defocusing gravitational microlensing [PDF]

, 1996
We introduce the notion of defocusing gravitational lens considering a MACHO located behind a light source with respect to an observer. The consequence of defocusing effect is a temporal variability of star luminosity which produces a gap instead of a ...
A A Marino, Alard C, Binney J, Blioh P V, Byrd P F, Carr B J, G Marmo, Harwit M, Hawking S W, Kaiser R, Paczynski B, Padmanabhan T, Papapetrou A, Peebles P J E, R de Ritis, Refsdal S, S Capozziello, Schneider P, Schneider P, Schneider P, Udalski A, V I Man'ko, Wald R M   +22 more
core   +3 more sources