Astrophysics – Page 522 – Kavli Institute Pre-Print Publications

Optical Design of the EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM)

Posted by December 18, 2020Chicago

Kavli Affiliate: Jeffrey McMahon | First 5 Authors: Thomas Essinger-Hileman, Trevor Oxholm, Gage Siebert, Alyssa Barlis, Emily M. Barrentine | Summary: This work describes the design and implementation of optics for EXCLAIM, the EXperiment for Cryogenic Large-Aperture Intensity Mapping. EXCLAIM is a balloon-borne telescope that will measure integrated line emission from carbon monoxide (CO) at […]

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Optical Design of the EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM)

Posted by December 18, 2020Chicago

Kavli Affiliate: Jeffrey McMahon | First 5 Authors: Thomas Essinger-Hileman, Danny Chmaytelli, Trevor Oxholm, Tatsat Parekh, Gage Siebert | Summary: This work describes the design and implementation of optics for EXCLAIM, the EXperiment for Cryogenic Large-Aperture Intensity Mapping. EXCLAIM is a balloon-borne telescope that will measure integrated line emission from carbon monoxide (CO) at redshifts […]

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Discovery of A candidate Hypervelocity star originated from the Sagittarius Dwarf Spheroidal galaxy

Posted by klaurent December 17, 2020Peking

Kavli Affiliate: Huawei Zhang | First 5 Authors: Yang Huang, Qingzheng Li, Huawei Zhang, Xinyi Li, Weixiang Sun | Summary: In this letter, we report the discovery of an intriguing HVS (J1443+1453) candidate that is probably from the Sagittarius Dwarf Spheroidal galaxy (Sgr dSph). The star is an old and very metal-poor low-mass main-sequence turn-off […]

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Understanding the Impacts of Stellar Companions on Planet Formation and Evolution: A Survey of Stellar and Planetary Companions within 25 pc

Posted by klaurent December 16, 2020Stanford

Kavli Affiliate: Bruce Macintosh | First 5 Authors: Lea A. Hirsch, Lee Rosenthal, Benjamin J. Fulton, Andrew W. Howard, David R. Ciardi | Summary: We explore the impact of outer stellar companions on the occurrence rate of giant planets detected with radial velocities. We searched for stellar and planetary companions to a volume-limited sample of […]

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Observational Evidence for Enhanced Black Hole Accretion in Giant Elliptical Galaxies

Posted by klaurent December 16, 2020MIT

Kavli Affiliate: Erin Kara | First 5 Authors: Michael McDonald, Brian R. McNamara, Michael S. Calzadilla, Chien-Ting Chen, Massimo Gaspari | Summary: We present a study of the relationship between black hole accretion rate (BHAR) and star formation rate (SFR) in a sample of giant elliptical galaxies. These galaxies, which live at the centers of […]

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Probing Inflation with Precision Bispectra

Posted by klaurent December 15, 2020Cambridge

Kavli Affiliate: E. P. S. Shellard | First 5 Authors: Philip Clarke, E. P. S. Shellard, , , | Summary: Calculating the primordial bispectrum predicted by a model of inflation and comparing it to what we see in the sky is very computationally intensive, necessitating layers of approximations and limiting the models which can be […]

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Gravitational wave constraints on the primordial black hole dominated early universe

Posted by klaurent December 15, 2020Tokyo

Kavli Affiliate: Misao Sasaki | First 5 Authors: Guillem Domènech, Chunshan Lin, Misao Sasaki, , | Summary: We calculate the gravitational waves (GWs) induced by the density fluctuations due to inhomogeneous distribution of primordial black holes (PBHs) in the case where PBHs eventually dominate and reheat the universe by Hawking evaporation. The initial PBH density […]

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Games and Computational Complexity

Posted by klaurent December 14, 2020Stanford

Kavli Affiliate: Zeeshan Ahmed | First 5 Authors: Zeeshan Ahmed, Alapan Chaudhuri, Kunwar Shaanjeet Singh Grover, Hrishi Narayanan, Manasvi Vaidyula | Summary: Computers are known to solve a wide spectrum of problems, however not all problems are computationally solvable. Further, the solvable problems themselves vary on the amount of computational resources they require for being […]

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Discovery of a damped Ly$α$ galaxy at z $sim$ 3 towards the quasar SDSS J011852+040644

Posted by klaurent Peking

Kavli Affiliate: Linhua Jiang | First 5 Authors: Ravi Joshi, Michele Fumagalli, Raghunathan Srianand, Pasquier Noterdaeme, Patrick Petitjean | Summary: We report the detection of the host galaxy of a damped Ly$alpha$ system (DLA) with log N(HI) $ [rm cm^{-2}]$ = $21.0 pm 0.10$ at $z approx 3.0091$ towards the background quasar SDSS J011852+040644 using […]

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Tiny-box: A tool for the versatile development and characterization of low noise fast X-ray imaging detectors

Posted by klaurent December 13, 2020MIT

Kavli Affiliate: Richard Foster | First 5 Authors: Tanmoy Chattopadhyay, Sven Herrmann, Steven Allen, Jack Hirschman, Glenn Morris | Summary: X-ray Charge Coupled Devices (CCDs) have been the workhorse for soft X-ray astronomical instruments for the past quarter century. They provide broad energy response, extremely low electronic read noise, and good energy resolution in soft […]

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