Lα Line of Dark Positronium as a Nongravitational Detection of DM
Affiliation(s)
1 Astro-Space Center, Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia. 2 Moscow Pedagogical State University, Moscow, Russia.
1 Astro-Space Center, Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia. 2 Moscow Pedagogical State University, Moscow, Russia.
ABSTRACT
An attempt to predict the new atomic dark matter lines is done on the example of a dark lepton atom-positronium. Its Layman-alpha line with the energy near 3 GeV may be observable if the appropriate conditions are realized. For this we have studied a γ-ray excess in the center of our galaxy. In principle, this excess may be produced by the Lα line of a dark positronium in the medium with Compton scattering. The possibility of observations of an annihilation line (E~300 TeV) of dark positronium is also predicted. Other proposals to observe the atomic dark matter are shortly described. Besides, Hα line (1.3μ) of usual positronum must be observable in the direction on the center of our galaxy.
An attempt to predict the new atomic dark matter lines is done on the example of a dark lepton atom-positronium. Its Layman-alpha line with the energy near 3 GeV may be observable if the appropriate conditions are realized. For this we have studied a γ-ray excess in the center of our galaxy. In principle, this excess may be produced by the Lα line of a dark positronium in the medium with Compton scattering. The possibility of observations of an annihilation line (E~300 TeV) of dark positronium is also predicted. Other proposals to observe the atomic dark matter are shortly described. Besides, Hα line (1.3μ) of usual positronum must be observable in the direction on the center of our galaxy.
Cite this paper
Burdyuzha, V. and Charugin, V. (2015) Lα Line of Dark Positronium as a Nongravitational Detection of DM. Journal of Modern Physics, 6, 1833-1839. doi: 10.4236/jmp.2015.613187.
Burdyuzha, V. and Charugin, V. (2015) Lα Line of Dark Positronium as a Nongravitational Detection of DM. Journal of Modern Physics, 6, 1833-1839. doi: 10.4236/jmp.2015.613187.
References
[1] Bulbul, E., Markevitch, M., Foster, A., Smith, R.K., Loewenstein, M. and Randall, S.W. (2014) Detection of an Unidentified Emission Line in the Stacked X-Ray Spectrum of Galaxy Clusters. The Astrophysical Journal, 789, 13.
http://arxiv.org/abs/1402.2301
http://dx.doi.org/10.1088/0004-637x/789/1/13 [2] Boyarsky, A., Ruchayskiy, O., Iakubovskyi, D. and Franse, J. (2014) An Unidentified Line in X-Ray Spectra of the Andromeda Galaxy and Perseus Galaxy Cluster. Physical Review Letters, 113, Article ID: 251301.
http://arxiv.org/abs/1402.4119
http://dx.doi.org/10.1103/physrevlett.113.251301 [3] Pearce, L., Petraki, K. and Kusenko, A. (2015) Signals from Dark Atom Formation in Halos. Physical Review D, 91, Article ID: 083532.
http://arxiv.org/abs/1502.01755
http://dx.doi.org/10.1103/physrevd.91.083532 [4] Conlon, J.P. and Day, F.V. (2014) 3.55 keV Photon Lines from Axion to Photon Conversion in the Milky Way and M31.
http://arxiv.org/abs/1404.7741 [5] Viel, M. (2014) Talk on Workshop “Cosmology from Baryons at High Redshifts”. 18-21 August 2014, Trieste. [6] Cline, J., Liu, Z.W., Moore, G.D., Farzan, Y. and Xue, W. (2014) 3.5 keV X-Rays as the “21 cm Line” of Dark Atoms, and a Link to Light Sterile Neutrinos. Physical Review D, 89, Article ID: 121302.
http://arxiv.org/abs/1404.3729
http://dx.doi.org/10.1103/physrevd.89.121302 [7] Cline, J. and Frey, A. (2014) Nonabelian Dark Matter Models for 3.5 keV X-Rays. Journal of Cosmology and Astroparticle Physics, 10, 13
http://arxiv.org/abs/1408.0233 http://dx.doi.org/10.1088/1475-7516/2014/10/013 [8] Burdyuzha, V., Kauts, V. and Yudin, N. (1992) The Possibility of Observation of Lα-Line of Positronium (e+e-) from Astronomical Objects. Astronomy & Astrophysics, 255, 459-461. [9] McClintock, J. (1984) On the Detection of Positrons via the Optical Lines of Positronium. Astrophysical Journal, 282, 291-295.
http://dx.doi.org/10.1086/162202 [10] Bussard, R., Ramaty, R. and Drachman, R. (1979) The Annihilation of Galactic Positrons. Astrophysical Journal, 228, 928-934.
http://dx.doi.org/10.1086/156920 [11] Burdyuzha, V.V. and Kauts, V.L. (1994) Recombinational Lines of P(S) (Positronium) as Tracer of Annihilation Processes. The Astrophysical Journal Supplement Series, 92, 549-550.
http://dx.doi.org/10.1086/192013 [12] Gould, R. (1989) Direct Positron Annihilation and Positronium Formation in Thermal Plasmas. Astrophysical Journal, 344, 232-238.
http://dx.doi.org/10.1086/167792 [13] Burdyuzha, V. and Kauts, V. (1995) Is It Possible to Observe Positronium in Astrophysical Conditions? Astronomy Letters, 21, 179-183. [14] Burdyuzha, V., Durouchoux, P. and Kauts, V. (1999) Possibility of Detecting the Hyperfine Ground State Transition of Positronium. Astronomy Letters, 25, 172-175. [15] Kardashev, N. (1979) Optimal Wavelength Region for Communication with Extraterrestrial Intelligence: λ = 1.5 mm. Nature, 278, 28-30.
http://dx.doi.org/10.1038/278028a0 [16] Daylan, T., Finkbeiner, D.P., Hooper, D., et al. (2015) Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter.
http://arxiv.org/abs/1402.6703 [17] Boyarsky, A., Malyshev, D. and Ruchayskiy, O. (2011) A Comment on the Emission from the Galactic Center as Seen by the Fermi Telescope. Physics Letters B, 705, 165-169.
http://dx.doi.org/10.1016/j.physletb.2011.10.014 [18] Hooper, D. and Linden, T. (2011) Origin of the Gamma Rays from the Galactic Center. Physical Review D, 84, Article ID: 123005.
http://dx.doi.org/10.1103/PhysRevD.84.123005 [19] Abazajian, K., Canac, N., Horiuchi, S. and Kaplinghat, M. (2014) Astrophysical and DM Interpretations of Extended Gamma-Ray Emission from the Galactic Center.
http://arxiv.org/abs/1402.4090 [20] Hooper, D. and Slatyer, T.R. (2013) Two Emission Mechanisms in the Fermi Bubbles: A Possible Signal of Annihilating Dark Matter. Physics of the Dark Universe, 2, 118-138.
http://dx.doi.org/10.1016/j.dark.2013.06.003 [21] Illarionov, A.F. and Sunyaev, R.A. (1972) Astron. Zh., 49, 58. [22] Pozdnyakov, L.A., Sobol, I.M. and Sunyaev, R.A. (1982) Comptonization and Formation of Spectra of X-ray Sources. Monte-Carlo Calculations. Itogi nauki i tekhniki, 21, 238. [23] Stecker, F.W. (1971) Cosmic Gamma Rays. Mono Book Co., Baltimore, 149. [24] Dubrovich, V.K. (2014) Identification of 3.55 KeV Line in the Framework of Standard Physics.
http://arxiv.org/abs/1407.4629 [25] Burdyuzha, V. (1993) Production of Mesons in Binary Systems and How They Can Be Observed, p. 280. [26] Kaplan, D.E., Krnjaic, G.Z., Rehermann, K.R. and Wells, C.M. (2009) Atomic Dark Matter.
http://arxiv.org/abs/0909.0753 [27] Petraki, K., Trodden, M. and Volkas, R.R. (2012) Visible and Dark Matter from a First-Order Phase Transition in a Baryon-Symmetric Universe.
http://arxiv.org/abs/1111.4786
[1] Bulbul, E., Markevitch, M., Foster, A., Smith, R.K., Loewenstein, M. and Randall, S.W. (2014) Detection of an Unidentified Emission Line in the Stacked X-Ray Spectrum of Galaxy Clusters. The Astrophysical Journal, 789, 13.
http://arxiv.org/abs/1402.2301
http://dx.doi.org/10.1088/0004-637x/789/1/13 [2] Boyarsky, A., Ruchayskiy, O., Iakubovskyi, D. and Franse, J. (2014) An Unidentified Line in X-Ray Spectra of the Andromeda Galaxy and Perseus Galaxy Cluster. Physical Review Letters, 113, Article ID: 251301.
http://arxiv.org/abs/1402.4119
http://dx.doi.org/10.1103/physrevlett.113.251301 [3] Pearce, L., Petraki, K. and Kusenko, A. (2015) Signals from Dark Atom Formation in Halos. Physical Review D, 91, Article ID: 083532.
http://arxiv.org/abs/1502.01755
http://dx.doi.org/10.1103/physrevd.91.083532 [4] Conlon, J.P. and Day, F.V. (2014) 3.55 keV Photon Lines from Axion to Photon Conversion in the Milky Way and M31.
http://arxiv.org/abs/1404.7741 [5] Viel, M. (2014) Talk on Workshop “Cosmology from Baryons at High Redshifts”. 18-21 August 2014, Trieste. [6] Cline, J., Liu, Z.W., Moore, G.D., Farzan, Y. and Xue, W. (2014) 3.5 keV X-Rays as the “21 cm Line” of Dark Atoms, and a Link to Light Sterile Neutrinos. Physical Review D, 89, Article ID: 121302.
http://arxiv.org/abs/1404.3729
http://dx.doi.org/10.1103/physrevd.89.121302 [7] Cline, J. and Frey, A. (2014) Nonabelian Dark Matter Models for 3.5 keV X-Rays. Journal of Cosmology and Astroparticle Physics, 10, 13
http://arxiv.org/abs/1408.0233 http://dx.doi.org/10.1088/1475-7516/2014/10/013 [8] Burdyuzha, V., Kauts, V. and Yudin, N. (1992) The Possibility of Observation of Lα-Line of Positronium (e+e-) from Astronomical Objects. Astronomy & Astrophysics, 255, 459-461. [9] McClintock, J. (1984) On the Detection of Positrons via the Optical Lines of Positronium. Astrophysical Journal, 282, 291-295.
http://dx.doi.org/10.1086/162202 [10] Bussard, R., Ramaty, R. and Drachman, R. (1979) The Annihilation of Galactic Positrons. Astrophysical Journal, 228, 928-934.
http://dx.doi.org/10.1086/156920 [11] Burdyuzha, V.V. and Kauts, V.L. (1994) Recombinational Lines of P(S) (Positronium) as Tracer of Annihilation Processes. The Astrophysical Journal Supplement Series, 92, 549-550.
http://dx.doi.org/10.1086/192013 [12] Gould, R. (1989) Direct Positron Annihilation and Positronium Formation in Thermal Plasmas. Astrophysical Journal, 344, 232-238.
http://dx.doi.org/10.1086/167792 [13] Burdyuzha, V. and Kauts, V. (1995) Is It Possible to Observe Positronium in Astrophysical Conditions? Astronomy Letters, 21, 179-183. [14] Burdyuzha, V., Durouchoux, P. and Kauts, V. (1999) Possibility of Detecting the Hyperfine Ground State Transition of Positronium. Astronomy Letters, 25, 172-175. [15] Kardashev, N. (1979) Optimal Wavelength Region for Communication with Extraterrestrial Intelligence: λ = 1.5 mm. Nature, 278, 28-30.
http://dx.doi.org/10.1038/278028a0 [16] Daylan, T., Finkbeiner, D.P., Hooper, D., et al. (2015) Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter.
http://arxiv.org/abs/1402.6703 [17] Boyarsky, A., Malyshev, D. and Ruchayskiy, O. (2011) A Comment on the Emission from the Galactic Center as Seen by the Fermi Telescope. Physics Letters B, 705, 165-169.
http://dx.doi.org/10.1016/j.physletb.2011.10.014 [18] Hooper, D. and Linden, T. (2011) Origin of the Gamma Rays from the Galactic Center. Physical Review D, 84, Article ID: 123005.
http://dx.doi.org/10.1103/PhysRevD.84.123005 [19] Abazajian, K., Canac, N., Horiuchi, S. and Kaplinghat, M. (2014) Astrophysical and DM Interpretations of Extended Gamma-Ray Emission from the Galactic Center.
http://arxiv.org/abs/1402.4090 [20] Hooper, D. and Slatyer, T.R. (2013) Two Emission Mechanisms in the Fermi Bubbles: A Possible Signal of Annihilating Dark Matter. Physics of the Dark Universe, 2, 118-138.
http://dx.doi.org/10.1016/j.dark.2013.06.003 [21] Illarionov, A.F. and Sunyaev, R.A. (1972) Astron. Zh., 49, 58. [22] Pozdnyakov, L.A., Sobol, I.M. and Sunyaev, R.A. (1982) Comptonization and Formation of Spectra of X-ray Sources. Monte-Carlo Calculations. Itogi nauki i tekhniki, 21, 238. [23] Stecker, F.W. (1971) Cosmic Gamma Rays. Mono Book Co., Baltimore, 149. [24] Dubrovich, V.K. (2014) Identification of 3.55 KeV Line in the Framework of Standard Physics.
http://arxiv.org/abs/1407.4629 [25] Burdyuzha, V. (1993) Production of Mesons in Binary Systems and How They Can Be Observed, p. 280. [26] Kaplan, D.E., Krnjaic, G.Z., Rehermann, K.R. and Wells, C.M. (2009) Atomic Dark Matter.
http://arxiv.org/abs/0909.0753 [27] Petraki, K., Trodden, M. and Volkas, R.R. (2012) Visible and Dark Matter from a First-Order Phase Transition in a Baryon-Symmetric Universe.
http://arxiv.org/abs/1111.4786