Parkes Pulsar Timing Array constraints on ultralight scalar-field dark matter

doi:10.1103/PhysRevD.98.102002

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	Parkes Pulsar Timing Array constraints on ultralight scalar-field dark matter
	Bhat, N. D. Ramesh 1; Shannon, Ryan M.11,17; Russell, Christopher J.5; Rosado, Pablo A.11; Reardon, Daniel J.11,17; Ravi, Vikram 6; Parthasarathy, Aditya 11; Oslowski, Stefan 11; Manchester, Richard N.14; Lasky, Paul D.17,19
刊名	PHYSICAL REVIEW D
	2018-11-05
卷号	98 期号:10 页码:102002
ISSN号	2470-0010
DOI	10.1103/PhysRevD.98.102002
产权排序	19
英文摘要	It is widely accepted that dark matter contributes about a quarter of the critical mass-energy density in our Universe. The nature of dark matter is currently unknown, with the mass of possible constituents spanning nearly one hundred orders of magnitude. The ultralight scalar field dark matter, consisting of extremely light bosons with m similar to 10(-22) eV and often called "fuzzy" dark matter, provides intriguing solutions to some challenges at sub-Galactic scales for the standard cold dark matter model. As shown by Khmelnitsky and Rubakov, such a scalar field in the Galaxy would produce an oscillating gravitational potential with nanohertz frequencies, resulting in periodic variations in the times of arrival of radio pulses from pulsars. The Parkes Pulsar Timing Array (PPTA) has been monitoring 20 millisecond pulsars at two-to three-week intervals for more than a decade. In addition to the detection of nanohertz gravitational waves, PPTA offers the opportunity for direct searches for fuzzy dark matter in an astrophysically feasible range of masses. We analyze the latest PPTA data set which includes timing observations for 26 pulsars made between 2004 and 2016. We perform a search in this data set for evidence of ultralight dark matter in the Galaxy using Bayesian and Frequentist methods. No statistically significant detection has been made. We, therefore, place upper limits on the local dark matter density. Our limits, improving on previous searches by a factor of 2 to 5, constrain the dark matter density of ultralight bosons with m <= 10(-23) eV to be below 6 GeV cm(-3) with 95% confidence in the Earth neighborhood. Finally, we discuss the prospect of probing the astrophysically favored mass range m greater than or similar to 10(-22) eV with next-generation pulsar timing facilities.
资助项目	Commonwealth of Australia ; IMPRS Bonn/Cologne ; ARC[DP150102988] ; ARC[CE170100004] ; ARC[FT160100112] ; ARC[DP180103155] ; DOE[DE-SC0011941] ; ARC Laureate Fellowship[FL150100148] ; Qing Cu Hui of Chinese Academy of Sciences (CAS) ; Bonn-Cologne Graduate School (BCGS) ; NASA ; NASA[NXX16AB27G]
WOS关键词	CONTINUOUS GRAVITATIONAL-WAVES ; INVISIBLE AXION ; DATA RELEASE ; BLACK-HOLES ; LAMBDA-CDM ; LIMITS ; NOISE ; DISPERSION ; COSMOLOGY ; GALAXIES
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000449296000001
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/2247]
专题	脉冲星研究团组
通讯作者	Zhu, Xingjiang; Porayko, Nataliya K.
作者单位	1.Curtin Univ, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia 2.Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Xinjiang 830011, Peoples R China 4.Auckland Univ Technol, Inst Radio Astron & Space Res, Private Bag 92006, Auckland 1142, New Zealand 5.CSIRO Sci Comp, Australian Technol Pk,Locked Bag 9013, Alexandria, NSW 1435, Australia 6.CALTECH, Cahill Ctr Astron & Astrophys, MC 249-17, Pasadena, CA 91125 USA 7.Naval Res Lab, Space Sci Div, Washington, DC 20375 USA 8.Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester M13 9PL, Lancs, England 9.CSIRO Informat Management & Technol, POB 225, Dickson, ACT 2602, Australia 10.Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
推荐引用方式 GB/T 7714	Bhat, N. D. Ramesh,Shannon, Ryan M.,Russell, Christopher J.,et al. Parkes Pulsar Timing Array constraints on ultralight scalar-field dark matter[J]. PHYSICAL REVIEW D,2018,98(10):102002.
APA	Bhat, N. D. Ramesh.,Shannon, Ryan M..,Russell, Christopher J..,Rosado, Pablo A..,Reardon, Daniel J..,...&Porayko, Nataliya K..(2018).Parkes Pulsar Timing Array constraints on ultralight scalar-field dark matter.PHYSICAL REVIEW D,98(10),102002.
MLA	Bhat, N. D. Ramesh,et al."Parkes Pulsar Timing Array constraints on ultralight scalar-field dark matter".PHYSICAL REVIEW D 98.10(2018):102002.