Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Chak Man Lee"'
Autor:
Man Ho Chan, Chak Man Lee
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 2, p L40 (2024)
Black hole dynamics suggests that dark matter would redistribute near a supermassive black hole (SMBH) to form a density spike. However, no direct evidence of a dark matter density spike around an SMBH has been identified. In this Letter, we present
Externí odkaz:
https://doaj.org/article/53df5f0535824aa69916bb9e49d3371c
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-7 (2022)
Abstract In the past three decades, many stars orbiting about the supermassive black hole (SMBH) at the Galactic Centre (Sgr A*) were identified. Their orbital nature can give stringent constraints for the mass of the SMBH. In particular, the star S2
Externí odkaz:
https://doaj.org/article/e7a19d83f2884aaaaf9a728d783cdef1
Constraining Annihilating Dark Matter Using the Multifrequency Radio Flux Profiles of the M33 Galaxy
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 141 (2024)
Radio data can give stringent constraints for annihilating dark matter. In general, radio observations can detect very accurate radio flux density with high resolution and different frequencies for nearby galaxies. We are able to obtain the radio flu
Externí odkaz:
https://doaj.org/article/8783fc3a06ee42d7b326b92254d5936a
Autor:
Man Ho Chan, Chak Man Lee
Publikováno v:
The Astrophysical Journal Letters, Vol 943, Iss 2, p L11 (2023)
It has been suggested for a long time that dark matter would form a density spike around a black hole. However, no promising evidence has been observed so far to verify this theoretical suggestion. Here, we report the existence of a dark matter densi
Externí odkaz:
https://doaj.org/article/bbbee4d8fe8d46d3affef64bdade3327
Autor:
Man Ho Chan, Chak Man Lee
Publikováno v:
Physics Letters B, Vol 825, Iss , Pp 136887- (2022)
Celestial objects such as stars and planets might be able to capture a large amount of dark matter particles through dark matter-nucleon scattering. Many previous studies have considered different celestial objects such as the Sun and the Earth as na
Externí odkaz:
https://doaj.org/article/e5d081f4f04e48a7a6a0b2d18d9b5eb9
Autor:
Man Ho Chan, Chak Man Lee
Publikováno v:
Physical Review D. 105
Recent gamma-ray and radio studies have obtained some stringent constraints on annihilating dark matter properties. However, only a few studies have focussed on using X-ray data to constrain annihilating dark matter. In this article, we perform the X
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::be16d40f750bfa024df6af01b862418e
https://doi.org/10.1103/physrevd.105.123006
https://doi.org/10.1103/physrevd.105.123006
Autor:
Man Ho Chan, Chak Man Lee
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 500:5583-5588
In the past decade, various instruments, such as the Large Area Telescope (LAT) on the Fermi Gamma Ray Space Telescope, the Alpha Magnetic Spectrometer (AMS) and the Dark Matter Particle Explorer(DAMPE), have been used to detect the signals of annihi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e5fa53c69b46502c4a1959f2dc66393
https://doi.org/10.1093/mnras/staa2895
https://doi.org/10.1093/mnras/staa2895
Autor:
Chak Man Lee, Man Ho Chan
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 495:L124-L128
In the past decade, some telescopes [e.g. Fermi-Large Area Telescope (LAT), Alpha Magnetic Spectrometer(AMS), and Dark Matter Particle Explorer(DAMPE)] were launched to detect the signals of annihilating dark matter in our Galaxy. Although some exces
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a94d1bb6bb1e73fa21010f860b752544
https://doi.org/10.1093/mnrasl/slz185
https://doi.org/10.1093/mnrasl/slz185
Autor:
Man Ho Chan, Chak Man Lee
Publikováno v:
Physical Review D. 103
We reply to the comment by Heesen and Br\"uggen. While we acknowledge the merit of their criticism, we argue that the limits obtained by our method are still valid, within our assumption. All the involved uncertainties should be addressed in depth in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d8ff840b4459660de85afac746d8acc
https://doi.org/10.1103/physrevd.103.048302
https://doi.org/10.1103/physrevd.103.048302
Autor:
Man Ho Chan, Chak Man Lee
Publikováno v:
Physical Review D. 102
Recent gamma-ray and radio observations provide stringent constraints for annihilating dark matter. The current $2\sigma$ lower limits of dark matter mass can be constrained to $\sim 100$ GeV for thermal relic annihilation cross section. In this arti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2636137315004156e334280fe872e685
https://doi.org/10.1103/physrevd.102.063017
https://doi.org/10.1103/physrevd.102.063017