Results 111 to 120 of about 168,724 (208)

Entropy of the Universe and Hierarchical Dark Matter. [PDF]

Entropy (Basel), 2022
Frampton PH.
europepmc   +1 more source

On Finding Black Holes in Photometric Microlensing Surveys

The Astrophysical Journal
There are expected to be millions of isolated black holes in the galaxy resulting from the deaths of massive stars. Measuring the abundance and properties of this remnant population would shed light on the end stages of stellar evolution and the ...
Zofia Kaczmarek, Peter McGill, Scott E. Perkins, William A. Dawson, Macy Huston, Ming-Feng Ho, Natasha S. Abrams, Jessica R. Lu   +7 more
doaj   +1 more source

Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky. [PDF]

Nat Astron, 2023
Goobar A, Johansson J, Schulze S, Arendse N, Carracedo AS, Dhawan S, Mörtsell E, Fremling C, Yan L, Perley D, Sollerman J, Joseph R, Hinds KR, Meynardie W, Andreoni I, Bellm E, Bloom J, Collett TE, Drake A, Graham M, Kasliwal M, Kulkarni SR, Lemon C, Miller AA, Neill JD, Nordin J, Pierel J, Richard J, Riddle R, Rigault M, Rusholme B, Sharma Y, Stein R, Stewart G, Townsend A, Vinko J, Wheeler JC, Wold A.   +37 more
europepmc   +1 more source

Gravitational Microlensing by Globular Clusters

, 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. Although the expected rate of microlensing events is small, such observations can lead to very useful results.
Jetzer, Philippe, Strässle, Marcus, Wandeler, Ursula   +2 more
openaire   +3 more sources

Probing Red Giant Atmospheres with Gravitational Microlensing

, 2019
Gravitational microlensing provides a new technique for studying the surfaces of distant stars.;Microlensing events are detected in real time and can be followed up with precision photometry and spectroscopy.
Loeb, Abraham, Sasselov, Dimitar, Heyrovsky, David   +2 more
core   +1 more source

Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey. IV. Lens Mass and Distance Measurements

The Astronomical Journal
As part of the Galactic Bulge Time Domain Survey (GBTDS), the Nancy Grace Roman Galactic Exoplanet Survey (RGES) will use microlensing to discover cold outer planets and free-floating planets not bound to stars.
Sean K. Terry, Etienne Bachelet, Farzaneh Zohrabi, Himanshu Verma, Alison Crisp, Macy J. Huston, Carissma McGee, Matthew Penny, Natasha S. Abrams, Michael D. Albrow, Jay Anderson, Fatemeh Bagheri, Jean-Philippe Beaulieu, Andrea Bellini, David P. Bennett, Galen Bergsten, T. Dex Bhadra, Aparna Bhattacharya, Ian A. Bond, Valerio Bozza, Christopher Brandon, Sebastiano Calchi Novati, Sean Carey, Jessie Christiansen, William DeRocco, B. Scott Gaudi, Jon Hulberg, Stela Ishitani Silva, Sinclaire E. Jones, Eamonn Kerins, Somayeh Khakpash, Katarzyna Kruszyńska, Casey Lam, Jessica R. Lu, Amber Malpas, Shota Miyazaki, Przemek Mróz, Arjun Murlidhar, David Nataf, Marz Newman, Greg Olmschenk, Radek Poleski, Clément Ranc, Nicholas J. Rattenbury, Krzysztof Rybicki, Vito Saggese, Jennifer Sobeck, Keivan G. Stassun, Alexander P. Stephan, Rachel A. Street, Takahiro Sumi, Daisuke Suzuki, Aikaterini Vandorou, Meet Vyas, Jennifer C. Yee, Weicheng Zang, Keming Zhang, (Roman Galactic Exoplanet Survey Project Infrastructure Team)   +57 more
doaj   +1 more source

Finding Planets via Gravitational Microlensing

This preprint will be published in: Handbook of Exoplanets 2nd edition, edited by Hans Deeg and Juan Antonio Belmonte, Springer Nature Switzerland AG, reproduced with permission of Springer Nature Switzerland ...
Rektsini, Natalia E., Batista, Virginie
openaire   +2 more sources

Finite-Size Gravitational Microlenses

The Astrophysical Journal, 1996
The finite size of a gravitational microlens may have an effect on the observed amplification of a background point source. The mechanism is occlusion of one or more of the source images by the opaque bulk material of the lens as it travels in front of the source.
openaire   +1 more source

Studying planet populations by gravitational microlensing

, 2010
The 'most curious' effect of the bending of light by the gravity of stars has evolved into a successful technique unlike any other for studying planets within the Milky Way and even other galaxies. With a sensitivity to cool planets around low-mass stars
Dominik, Martin
core   +1 more source

Exoplanet search with gravitational microlensing

, 2011
. Different regimes of gravitational lensing depend on lens masses and roughly correspond to angular distance between images. If a gravitational lens has a typical stellar mass, this regime is named microlensing because the typical angular distance ...
G Ingrosso, S Calchi Novati, A A Nucita, F De Paolis, A F Zakharov   +4 more
core