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pro vyhledávání: '"Lam, Casey Y."'
Most galaxies, including the Milky Way, harbor a central supermassive black hole (SMBH) weighing millions to billions of solar masses. Surrounding these SMBHs are dense regions of stars and stellar remnants, such as neutron stars and black holes. Neu
Externí odkaz:
http://arxiv.org/abs/2310.17707
Autor:
Perkins, Scott Ellis, McGill, Peter, Dawson, William, Abrams, Natasha S., Lam, Casey Y., Ho, Ming-Feng, Lu, Jessica R., Bird, Simeon, Pruett, Kerianne, Golovich, Nathan, Chapline, George
From the formation mechanisms of stars and compact objects to nuclear physics, modern astronomy frequently leverages surveys to understand populations of objects to answer fundamental questions. The population of dark and isolated compact objects in
Externí odkaz:
http://arxiv.org/abs/2310.03943
Autor:
Lam, Casey Y., Lu, Jessica R.
There are expected to be $\sim 10^8$ isolated black holes (BHs) in the Milky Way. OGLE-2011-BLG-0462/MOA-2011-BLG-191 (OB110462) is the only such BH with a mass measurement to date. However, its mass is disputed: Lam et al. (2022a,b) measured a lower
Externí odkaz:
http://arxiv.org/abs/2308.03302
Autor:
Lam, Casey Y., Abrams, Natasha, Andrews, Jeff, Bachelet, Etienne, Bahramian, Arash, Bennett, David, Bozza, Valerio, Broekgaarden, Floor, Chakrabarti, Sukanya, Dawson, William, El-Badry, Kareem, Fishbach, Maya, Fragione, Giacomo, Gaudi, Scott, Gautam, Abhimat, Hirai, Ryosuke, Holz, Daniel, Hosek Jr., Matthew, Huston, Macy, Jayasinghe, Tharindu, Johnson, Samson, Kawata, Daisuke, Koshimoto, Naoki, Lu, Jessica R., Mandel, Ilya, Miyazaki, Shota, Mróz, Przemek, Naoz, Smadar, Ranc, Clément, Rowan, Dominick, Schödel, Rainer, Shenar, Tomer, Simon, Josh, Street, Rachel, Sumi, Takahiro, Suzuki, Daisuke, Terry, Sean
Although there are estimated to be 100 million isolated black holes (BHs) in the Milky Way, only one has been found so far, resulting in significant uncertainty about their properties. The Galactic Bulge Time Domain Survey provides the only opportuni
Externí odkaz:
http://arxiv.org/abs/2306.12514
Autor:
Rose, Sam, Lam, Casey Y., Lu, Jessica R., Medford, Michael, Hosek Jr., Matthew W., Abrams, Natasha S., Ramey, Emily, Vasylyev, Sergiy S.
Uncertainty in the initial-final mass relation (IFMR) has long been a problem in understanding the final stages of massive star evolution. One of the major challenges of constraining the IFMR is the difficulty of measuring the mass of non-luminous re
Externí odkaz:
http://arxiv.org/abs/2211.04471
Autor:
Lam, Casey Y., Lu, Jessica R., Udalski, Andrzej, Bond, Ian, Bennett, David P., Skowron, Jan, Mroz, Przemek, Poleski, Radek, Sumi, Takahiro, Szymanski, Michal K., Kozlowski, Szymon, Pietrukowicz, Pawel, Soszynski, Igor, Ulaczyk, Krzysztof, Wyrzykowski, Lukasz, Miyazaki, Shota, Suzuki, Daisuke, Koshimoto, Naoki, Rattenbury, Nicholas J., Hosek Jr., Matthew W., Abe, Fumio, Barry, Richard, Bhattacharya, Aparna, Fukui, Akihiko, Fujii, Hirosane, Hirao, Yuki, Itow, Yoshitaka, Kirikawa, Rintaro, Kondo, Iona, Matsubara, Yutaka, Matsumoto, Sho, Muraki, Yasushi, Olmschenk, Greg, Ranc, Clement, Okamura, Arisa, Satoh, Yuki, Silva, Stela Ishitani, Toda, Taiga, Tristram, Paul J., Vandorou, Aikaterini, Yama, Hibiki, Abrams, Natasha S., Agarwal, Shrihan, Rose, Sam, Terry, Sean K.
We present the analysis of five black hole candidates identified from gravitational microlensing surveys. Hubble Space Telescope astrometric data and densely sampled lightcurves from ground-based microlensing surveys are fit with a single-source, sin
Externí odkaz:
http://arxiv.org/abs/2202.01903
Microlensing events have historically been discovered throughout the Galactic bulge and plane by surveys designed solely for that purpose. We conduct the first multi-year search for microlensing events on the Zwicky Transient Facility (ZTF), an all-s
Externí odkaz:
http://arxiv.org/abs/2201.08335
Autor:
Golovich, Nathan, Dawson, William A., Bartolić, Fran, Lam, Casey Y., Lu, Jessica R., Medford, Michael S., Schneider, Michael D., Chapline, George, Schlafly, Edward F., Drlica-Wagner, Alex, Pruett, Kerianne
Modern surveys of gravitational microlensing events have progressed to detecting thousands per year. Surveys are capable of probing Galactic structure, stellar evolution, lens populations, black hole physics, and the nature of dark matter. One of the
Externí odkaz:
http://arxiv.org/abs/2009.07927
Autor:
Medford, Michael S., Lu, Jessica R., Dawson, William A., Lam, Casey Y., Golovich, Nathan R., Schlafly, Edward F., Nugent, Peter
Publikováno v:
The Astrophysical Journal, 2020, Volume 897, Number 2, 144
Microlensing surveys have discovered thousands of events with almost all events discovered within the Galactic bulge or toward the Magellanic clouds. The Zwicky Transient Facility (ZTF), while not designed to be a microlensing campaign, is an optical
Externí odkaz:
http://arxiv.org/abs/2006.05439
Autor:
Lam, Casey Y., Lu, Jessica R., Hosek, Jr., Matthew W., Dawson, William A., Golovich, Nathan R.
We present a new Milky Way microlensing simulation code, dubbed PopSyCLE (Population Synthesis for Compact object Lensing Events). PopSyCLE is the first resolved microlensing simulation to include a compact object distribution derived from numerical
Externí odkaz:
http://arxiv.org/abs/1912.04510