Kerstin M. Perez
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Arxiv:1908.09037V3 [Astro-Ph.HE] 8 May 2020
NuSTAR tests of sterile-neutrino dark matter: New Galactic bulge observations and combined impact Brandon M. Roach,1, ∗ Kenny C. Y. Ng,2, y Kerstin Perez,1, z John F. Beacom,3, 4, 5, x Shunsaku Horiuchi,6, { Roman Krivonos,7, ∗∗ and Daniel R. Wik8, yy 1Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 2Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel 3Center for Cosmology and AstroParticle Physics (CCAPP), Ohio State University, Columbus, OH 43210, USA 4Department of Physics, Ohio State University, Columbus, OH 43210, USA 5Department of Astronomy, Ohio State University, Columbus, OH 43210, USA 6Center for Neutrino Physics, Department of Physics, Virginia Tech, Blacksburg, VA 24061, USA 7Space Research Institute of the Russian Academy of Sciences (IKI), Moscow 117997, Russia 8Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA (Dated: Received 4 October 2019; accepted 2 April 2020; published 8 May 2020) We analyze two dedicated NuSTAR observations with exposure ∼190 ks located ∼10◦ from the Galactic plane, one above and the other below, to search for x-ray lines from the radiative decay of sterile-neutrino dark matter. These fields were chosen to minimize astrophysical x-ray backgrounds while remaining near the densest region of the dark matter halo. We find no evidence of anomalous x-ray lines in the energy range 5{20 keV, corresponding to sterile neutrino masses 10{40 keV. Interpreted in the context of sterile neutrinos produced via neutrino mixing, these observations provide the leading constraints in the mass range 10{12 keV, improving upon previous constraints in this range by a factor ∼2. -
1 KERSTIN MARIE PEREZ Curriculum Vitae MIT Physics Department Phone
1 KERSTIN MARIE PEREZ Curriculum Vitae MIT Physics Department Phone: (617) 324-1522 77 Massachusetts Ave., 26-506 Email: [email protected] Cambridge MA 02139 Degrees: PhD in Physics, California Institute of Technology, 2011. Dissertation advisor: Emlyn Hughes. M.S. in Physics, California Institute of Technology, 2008. B.A. in Physics, Columbia University, 2005. Employment: Postdoctoral researcher, Columbia University, 2011-2012. Supervisor: Charles Hailey. NSF Astronomy & Astrophysics Postdoctoral Fellow, Columbia University, 2012-2014. Assistant Professor of Physics, Haverford College, 2015-2016. Assistant Professor of Physics, Massachusetts Institute of Technology, 2016-Current. Honors: Cottrell Scholar Award, Research Corporation for Science Advancement, 2019. Class of 1948 Career Development Professorship, MIT, 2019. School of Science Teaching Prize for Undergraduate Education, MIT, 2018. Buechner Faculty Teaching Prize, MIT Physics Department, 2018. Sloan Research Fellowship, Sloan Foundation, 2017. NASA Group Achievement Award for NuSTAR Galactic Plane Survey Team, NASA, 2016. Cottrell College Science Award, Research Corporation for Science Advancement, 2015. NASA Group Achievement Award for NuSTAR Science Team, NASA, 2015. Astronomy & Astrophysics Postdoctoral Fellowship, National Science Foundation, 2012. US Large Hadron Collider Graduate Student Support Award, National Science Foundation, 2010. Robert A. Millikan Graduate Fellowship, California Institute of Technology, 2006. Undergraduate Students Supervised: Wang, Cindy ('23): Summer 2020. Protyasha, Nishat (`22): Summer 2019, Fall 2019, Spring 2020. Seyler, Devin (`22): Fall 2019, Spring 2020, Summer 2020. Bouche, Ian ('21): Summer 2020. 2 Faustina, Aidan ('21): Summer 2020. Hernandez, Analyce ('21): Spring 2020, Summer 2020. Taylor, Afura (`21): Summer 2018, Fall 2018, Spring 2019. Brown, Jonathon (`20): Fall 2016, Spring 2017, Fall 2018, Spring 2018. Li, Ivy (`20): Summer 2017, Fall 2017, Spring 2018, Fall 2018, Spring 2019, Fall 2019; Currently: Fulbright Scholar and Rice University Ph.D. -
Alfred P. Sloan Foundation 2017 Annual Report Alfred P
Alfred P. Sloan Foundation 2017 Annual Report Alfred P. Sloan Foundation $ 2017 Annual Report Contents Preface II Mission Statement III From the President IV 2017: The Year in Discovery VI 2017 Grants by Program 1 2017 Financial Review 100 Audited Financial Statements and Schedules 102 Board of Trustees 129 Officers and Staff 130 Index of 2017 Grant Recipients 131 Cover: Based on the bestselling, Sloan-supported book by Margot Lee Shetterly, Hidden Figures—the untold story of the black women mathematicians who helped NASA win the space race—thrilled audiences and critics alike in 2017, bringing in over $235 million worldwide and garnering three Academy Award nominations, two Golden Globe nominations, and a SAG award for best ensemble. I Alfred P. Sloan Foundation $ 2017 Annual Report Preface The ALFRED P. SLOAN FOUNDATION administers a private fund for the benefit of the public. It accordingly recognizes the responsibility of making periodic reports to the public on the management of this fund. The Foundation therefore submits this public report for the year 2017. II Alfred P. Sloan Foundation $ 2017 Annual Report Mission Statement The ALFRED P. SLOAN FOUNDATION makes grants primarily to support original research and education related to science, technology, engineering, mathematics, and economics. The Foundation believes that these fields—and the scholars and practitioners who work in them—are chief drivers of the nation's health and prosperity. The Foundation also believes that a reasoned, systematic understanding of the forces of nature and society, when applied inventively and wisely, can lead to a better world for all. III Alfred P. -
2019 Annual Report
Global Perspective 2019 Annual Report “Science knows no country, because knowledge belongs to humanity and is the torch which illuminates the world.” Louis Pasteur, chemist and microbiologist cience can provide mechanistic insights into Fulbright Commission at the July 2019 Cottrell Although RCSA is able to focus support on only the most challenging riddles we can ask Scholar Conference in Tucson (see the Cottrell a fraction of the globe, we aim to include a Sabout anything in the universe. It can also Scholar Conference page on our website for the global perspective in our scientific programs and lead to practical answers for the major problems video!) communities and are working to provide more shared by all of humanity. Because so many of the For many years, RCSA funded scientists in Canada, inclusive ways to bring together scientists from questions facing us today are global or beyond but eligibility was restricted to domestic applicants around the world. global — the spread and cure of disease, the a decade ago during the financial crisis. We production and storage of energy, climate change, have now restored eligibility in our programs to access to clean water, and the detection of non- scientists at institutions in Canada. Past Cottrell terrestrial life — it makes sense to find ways to Scholars based in Canada can once again apply engage scientists from different nations. for Cottrell Plus Awards, faculty completing their Throughout its history, Research Corporation for third year as independent teacher-scholars on the Science Advancement has focused primarily on tenure track can apply for the Cottrell Scholar supporting scientists within the United States. -
New Constraints on Sterile Neutrino Dark Matter from $ Nustar $ M31
New Constraints on Sterile Neutrino Dark Matter from NuSTAR M31 Observations Kenny C. Y. Ng,1, ∗ Brandon M. Roach,2, y Kerstin Perez,2, z John F. Beacom,3, 4, 5, x Shunsaku Horiuchi,6, { Roman Krivonos,7, ∗∗ and Daniel R. Wik8, yy 1Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, Israel 2Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA 3Center for Cosmology and AstroParticle Physics (CCAPP), Ohio State University, Columbus, OH 43210, USA 4Department of Physics, Ohio State University, Columbus, OH 43210, USA 5Department of Astronomy, Ohio State University, Columbus, OH 43210, USA 6Center for Neutrino Physics, Department of Physics, Virginia Tech, Blacksburg, VA 24061, USA 7Space Research Institute of the Russian Academy of Sciences (IKI), Moscow, Russia, 117997 8Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA (Dated: April 22, 2019) We use a combined 1.2 Ms of NuSTAR observations of M31 to search for X-ray lines from sterile neutrino dark matter decay. For the first time in a NuSTAR analysis, we consistently take into account the signal contribution from both the focused and unfocused fields of view. We also reduce the modeling systematic uncertainty by performing spectral fits to each observation individually and statistically combining the results, instead of stacking the spectra. We find no evidence of unknown lines, and thus derive limits on the sterile neutrino parameters. Our results place stringent constraints for dark matter masses & 12 keV, which reduces the available parameter space for sterile neutrino dark matter produced via neutrino mixing (e.g., in the νMSM) by approximately one-third. -
Nustar Tests of Sterile-Neutrino Dark Matter: New Galactic Bulge Observations and Combined Impact
PHYSICAL REVIEW D 101, 103011 (2020) NuSTAR tests of sterile-neutrino dark matter: New Galactic bulge observations and combined impact † ‡ ∥ Brandon M. Roach ,1,* Kenny C. Y. Ng ,2, Kerstin Perez ,1, John F. Beacom ,3,4,5,§ Shunsaku Horiuchi ,6, Roman Krivonos ,7,¶ and Daniel R. Wik 8,** 1Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA 2Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel 3Center for Cosmology and AstroParticle Physics (CCAPP), Ohio State University, Columbus, OH 43210, USA 4Department of Physics, Ohio State University, Columbus, Ohio 43210, USA 5Department of Astronomy, Ohio State University, Columbus, Ohio 43210, USA 6Center for Neutrino Physics, Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA 7Space Research Institute of the Russian Academy of Sciences (IKI), Moscow 117997, Russia 8Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA (Received 4 October 2019; accepted 2 April 2020; published 8 May 2020) We analyze two dedicated NuSTAR observations with exposure ∼190 ks located ∼10° from the Galactic plane, one above and the other below, to search for x-ray lines from the radiative decay of sterile-neutrino dark matter. These fields were chosen to minimize astrophysical x-ray backgrounds while remaining near the densest region of the dark matter halo. We find no evidence of anomalous x-ray lines in the energy range 5–20 keV, corresponding to sterile neutrino masses 10–40 keV. Interpreted in the context of sterile neutrinos produced via neutrino mixing, these observations provide the leading constraints in the mass range 10–12 keV, improving upon previous constraints in this range by a factor ∼2. -
Letter of Interest the GAPS Experiment: Cosmic Antinuclei As
Snowmass2021 - Letter of Interest The GAPS Experiment: Cosmic Antinuclei as Messengers for Dark Matter Thematic Areas: (CF1) Dark Matter: Particle Like (CF2) Dark Matter: Wavelike (CF3) Dark Matter: Cosmic Probes (CF4) Dark Energy and Cosmic Acceleration: The Modern Universe (CF5) Dark Energy and Cosmic Acceleration: Cosmic Dawn and Before (CF6) Dark Energy and Cosmic Acceleration: Complementarity of Probes and New Facilities (CF7) Cosmic Probes of Fundamental Physics (Other) [Please specify frontier/topical group] Contact Information: Kerstin Perez / Massachusetts Institute of Technology The GAPS (General Antiparticle Spectrometer) Collaboration [email protected] Abstract: Any dark matter signal in cosmic particle spectra continues to be obscured by large and uncertain as- trophysical backgrounds. In the coming decade, the General Antiparticle Spectrometer (GAPS), which is the first experiment optimized specifically for low-energy (<0.25 GeV/n) cosmic antinuclei, will begin its Antarctic balloon program. Low-energy antideuterons provide a “smoking gun” signature of dark matter annihilation or decay, essentially free of astrophysical background. Low-energy antiprotons are a vital part- ner for this analysis, and low-energy antihelium could provide further discovery space for new physics. By opening unique sensitivity to low-energy antiprotons, antideuterons, and antihelium, GAPS is poised to of- fer a breakthrough in new physics searches using cosmic particles. Authors: Kerstin Perez1, Tsuguo Aramaki2, Mirko Boezio3, Steven E. Boggs4, -
Almost Closing the #MSM Sterile Neutrino Dark Matter Window with Nustar
Almost closing the #MSM sterile neutrino dark matter window with NuSTAR The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation Perez, Kerstin et al. “Almost Closing the ν MSM Sterile Neutrino Dark Matter Window with NuSTAR.” Physical Review D 95.12 (2017): n. pag. © 2017 American Physical Society As Published http://dx.doi.org/10.1103/PhysRevD.95.123002 Publisher American Physical Society Version Final published version Citable link http://hdl.handle.net/1721.1/109799 Terms of Use Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. PHYSICAL REVIEW D 95, 123002 (2017) Almost closing the νMSM sterile neutrino dark matter window with NuSTAR † ‡ Kerstin Perez,1,2,* Kenny C. Y. Ng,3,4, John F. Beacom,3,4,5, Cora Hersh,2,§ ∥ Shunsaku Horiuchi,6, and Roman Krivonos7,¶ 1Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA 2Department of Physics, Haverford College, Haverford, Pennsylvania 19141, USA 3Center for Cosmology and AstroParticle Physics (CCAPP), Ohio State University, Columbus, Ohio 43210, USA 4Department of Physics, Ohio State University, Columbus, Ohio 43210, USA 5Department of Astronomy, Ohio State University, Columbus, Ohio 43210, USA 6Center for Neutrino Physics, Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA 7Space Research Institute of the Russian Academy of Sciences (IKI), Moscow 117997, Russia (Received 7 December 2016; published 7 June 2017) We use NuSTAR observations of the Galactic center to search for x-ray lines from the radiative decay of sterile neutrino dark matter.