2007ApJ...670..741L

Query : 2007ApJ...670..741L

2007ApJ...670..741L - Astrophys. J., 670, 741-746 (2007/November-3)

Mergers of binary compact objects.

LEE C.-H., PARK H.-J. and BROWN G.E.

Abstract (from CDS):

We work out the effects of hypercritical accretion, which transfers mass from the secondary to the primary (older) neutron star (NS) in a binary, showing that such accretion would cause the mass of the primary to end up ≳0.6 M☉ greater than the secondary NS, in contradiction with the very nearly equal masses measured in binary neutron stars to date. We point out that the primary NS will evolve into a low-mass black hole (LMBH) as a consequence of hypercritical accretion. Using a flat distribution in the mass ratio q (≡Msecondary/Mprimary), favored by Duquennoy & Mayor, we calculate the ratio of LMBH-NS to NS-NS systems to be ∼5, in rough agreement with the result of Pinsonneault & Stanek. The latter authors emphasized the importance of ``twins'', which we discuss. The two neutron stars in twin systems would be close in mass and further increase the number of mergers.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Close - Stars: Evolution - Stars: Neutron - Stars: Statistics

Simbad objects: 19

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Number of rows : 19
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 SN 1987A SN* 05 35 27.98840 -69 16 11.1134           SNIIpec 5203 2
3 PSR J0737-3039A Psr 07 37 51.24669 -30 39 40.6895           ~ 317 1
4 PSR J0737-3039 Psr 07 37 51.248 -30 39 40.83           ~ 445 1
5 PSR J0737-3039B Psr 07 37 51.24927 -30 39 40.7195           ~ 222 1
6 PSR J0751+1807 Psr 07 51 09.1539 +18 07 38.335           ~ 316 1
7 PSR J1022+10 Psr 10 22 57.990 +10 01 52.92           ~ 279 2
8 PSR J1141-6545 Psr 11 41 07.00060 -65 45 19.0500     25.08 24.38   ~ 207 1
9 PSR J1157-5112 Psr 11 57 08.166 -51 12 56.14           ~ 32 1
10 PSR J1435-60 Psr 14 35 20.2733756922 -61 00 57.545079751           ~ 58 1
11 PSR J1452-5851 Psr 14 52 52.58 -58 51 13.3           ~ 21 0
12 PSR J1518+4904 Psr 15 18 16.832 +49 04 34.19           ~ 201 1
13 PSR B1534+11 Psr 15 37 09.9603 +11 55 55.554           ~ 453 1
14 PSR J1756-2251 Psr 17 56 46.63 -22 51 59.4           ~ 153 1
15 PSR J1756-5322 Psr 17 57 15.154960 -53 22 26.59604           ~ 56 0
16 PSR J1915+1606 Psr 19 15 27.99999 +16 06 27.4034     22.5     ~ 1032 1
17 PSR J2129+1209C Psr 21 30 01.2030 +12 10 38.159           ~ 215 2
18 PSR B2145-07.8 Psr 21 45 50.45590 -07 50 18.5900           ~ 336 0
19 PSR J2305+4707 Psr 23 05 55.842 +47 07 45.32           ~ 227 1

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