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Cited by 85Cosmology and Gravitation TheoriesAstrophysical Phenomena and ObservationsGalaxies: Formation, Evolution, Phenomena

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OBSERVATIONAL UPPER BOUND ON THE COSMIC ABUNDANCES OF NEGATIVE-MASS COMPACT OBJECTS AND ELLIS WORMHOLES FROM THE SLOAN DIGITAL SKY SURVEY QUASAR LENS SEARCH

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Takahashi, Ryuichi, Asada, Hideki·2013·The Astrophysical Journal
DOI 10.1088/2041-8205/768/1/l16
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Abstract

The latest result in the Sloan Digital Sky Survey Quasar Lens Search (SQLS) has set the first cosmological constraints on negative-mass compact objects and Ellis wormholes. There are no multiple images lensed by the above two exotic objects for ∼50, 000 distant quasars in the SQLS data. Therefore, an upper bound is put on the cosmic abundances of these lenses. The number density of negative-mass compact objects is n < 10 −8 (10 −4 ) h 3 Mpc −3 at the mass scale | M | > 10 15 (10 12 ) M ☉ , which corresponds to the cosmological density parameter |Ω| < 10 −4 at the galaxy and cluster mass range | M | = 10 12–15 M ☉ . The number density of the Ellis wormhole is n < 10 −4 h 3 Mpc −3 for a range of the throat radius a = 10–10 4 pc, which is much smaller than the Einstein ring radius.

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Research works printed but not linked: 21

  1. Barnacka, 2012, PhRvD, 86, 043001
  2. Bondi, 1957, RvMP, 29, 423
  3. Cramer, 1995, PhRvD, 51, 3117
  4. Hinshaw, 2012, ApJS
  5. Ilić, 2013, A&A
  6. Jammer, 1961, Concepts of Mass in Classical and Modern Physics
  7. Jammer, 1999, Concepts of Mass in Contemporary Physics and Philosophy
  8. Kitamura, 2013, PhRvD, 87, 027501
  9. Krasnikov, 2000, PhRvD, 62, 084028
  10. Miyazaki, 2006, Proc. SPIE, 6269, 9
  11. Morris, 1988, AmJPh, 56, 395
  12. Morris, 1988, PhRvL, 61, 1446
  13. Nakajima, 2012, PhRvD, 85, 107501
  14. Nandi, 2006, PhRvD, 74, 024020
  15. Oguri, 2010, MNRAS, 405, 2579
  16. Perlick, 2004, PhRvD, 69, 064017
  17. Safonova, 2001, PhRvD, 65, 023001
  18. Schneider, 2006, Gravitational Lensing: Strong, Weak and Micro
  19. Torres, 1998, PhRvD, 58, 123001
  20. Tsukamoto, 2013, PhRvD, 87, 024024
  21. Visser, 1995, Lorentzuan Wormholes: From Einstein to Hawking

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Metadata

Authors
Takahashi, R., & Asada, H.
Affiliations
Hirosaki University (JP)
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2013-04-17
Volume
768
Issue
1
Pages
L16
ISSN
  • 2041-8205 (ISSN-L)
  • 2041-8213
DOI
10.1088/2041-8205/768/1/l16
OpenAlex
W2120485639
Cited by
85
References
24
Citations by year
2026: 4 · 2025: 4 · 2024: 7 · 2023: 11 · 2022: 7 · 2021: 9 · 2020: 6 · 2019: 2 · 2018: 12 · 2017: 10 · 2016: 4 · 2015: 4 · 2014: 4 · 2013: 1
FWCI
2.34
Type
journal article
Language
en
Open access
Licence
Locations
  • The Astrophysical Journal Letters (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
Japan Society for the Promotion of Science (25287062)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
Keywords
Ellis wormhole, quasar lensing, number density, exotic compact objects

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CoChat. (2026). Citation check: OBSERVATIONAL UPPER BOUND ON THE COSMIC ABUNDANCES OF NEGATIVE-MASS COMPACT OBJECTS AND ELLIS WORMHOLES FROM THE SLOAN DIGITAL SKY SURVEY QUASAR LENS SEARCH. https://app.cochat.ai/papers/10.1088/2041-8205/768/1/l16
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Takahashi, R., & Asada, H. (2013). OBSERVATIONAL UPPER BOUND ON THE COSMIC ABUNDANCES OF NEGATIVE-MASS COMPACT OBJECTS AND ELLIS WORMHOLES FROM THE SLOAN DIGITAL SKY SURVEY QUASAR LENS SEARCH. The Astrophysical Journal. https://doi.org/10.1088/2041-8205/768/1/l16