Built on

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2019

Pulsar Timing Probes of Primordial Black Holes and Subhalos

Dror, Jeff A., Ramani, Harikrishnan, Trickle, Tanner et al.

Understand

Pulsars act as accurate clocks, sensitive to gravitational redshift and acceleration induced by transiting clumps of matter.

We study the sensitivity of pulsar timing arrays (PTAs) to single transiting compact objects, focusing on primordial black holes and compact subhalos in the mass range from $10^{-12} M _{\odot}$ to well above $100~M_\odot$.
We find that the Square Kilometer Array can constrain such objects to be a subdominant component of the dark matter over this entire mass range, with sensitivity to a dark matter sub-component reaching the sub-percent level over significant parts of this range.
We also find that PTAs offer an opportunity to probe substantially less dense objects than lensing because of the large effective radius over which such objects can be observed, and we quantify the subhalo concentration parameters which can be constrained.

Built on

S. Hawking, Monthly Notices of the Royal Astronomical Society 152
1971
Earlier work this paper cites.
B. J. Carr and S. W. Hawking, Monthly Notices of the Royal Astronomical Society 168
1974
Earlier work this paper cites.
B. J. Carr, The Astrophysical Journal 201
1975
Earlier work this paper cites.
J. A. Fillmore and P. Goldreich, Astrophysics Journal 281
1984
Earlier work this paper cites.
E. Bertschinger, Astrophysics Journal 58
1985
Earlier work this paper cites.
C. Hogan and M. Rees, Physics Letters B 205
1988
Earlier work this paper cites.
A. Gould, Astrophys. J. 386
1992
Earlier work this paper cites.
E. W. Kolb and I. I. Tkachev, Phys. Rev. Lett. 71
1993
Earlier work this paper cites.
B. J. Carr, J. H. Gilbert, and J. E. Lidsey, Phys. Rev. D50
1994
Earlier work this paper cites.
R. J. Nemiroff and A. Gould, Astrophys. J. 452
1995
Earlier work this paper cites.
E. W. Kolb and I. I. Tkachev, Astrophys. J. 460
1996
Earlier work this paper cites.
M. Kawasaki, N. Sugiyama, and T. Yanagida, Phys. Rev. D57
1998
Earlier work this paper cites.
R. A. Allsman et al. (Macho), Astrophys. J. 550
2001
Earlier work this paper cites.
P. N. Wilkinson, D. R. Henstock, I. W. A. Browne, A. G. Polatidis, P. Augusto, A. C. S. Readhead, T. J. Pearson, W. Xu, G. B. Taylor, and R. C. Vermeulen, Phys. Rev. Lett. 86
2001
Earlier work this paper cites.
I. Cognard and D. C. Backer, Astrophys. J. 612
2004
Earlier work this paper cites.
K. M. Zurek, C. J. Hogan, and T. R. Quinn, Phys. Rev. D75
2007
Earlier work this paper cites.
P. Tisserand et al. (EROS-2), Astron. Astrophys. 469
2007
Earlier work this paper cites.
E. R. Siegel, M. P. Hertzberg, and J. N. Fry, Mon. Not. Roy. Astron. Soc. 382
2007
Earlier work this paper cites.
N. Seto and A. Cooray, Astrophys. J. 659
2007
Earlier work this paper cites.
B. J. Carr, K. Kohri, Y. Sendouda, and J. Yokoyama, Phys. Rev. D81
Original
2010
Earlier work this paper cites.
A. L. Erickcek and K. Sigurdson, Phys. Rev. D84
Original
2011
Earlier work this paper cites.