Modeling the Radial Distribution of Blue Stragglers in M3

Recent surveys of the blue straggler (BS) population in the galactic globular cluster M3 (NGC 5272) give the first complete characterization of the number density of BSs as a function of radius over an entire globular cluster. The BSs in M3 are overabundant at large radii, and significantly underabundant at intermediate radii. Here we present the result of a simulation of the dynamical evolution of a population of BSs in a multi--mass model of M3. Assuming the BSs were formed in the core through binary interactions (Hut \&\ Verbunt 1983, Leonard 1989, Sigurdsson \&\ Phinney 1993, Hut \etal 1992, Davies, Benz and Hills 1994), and given some very general assumptions about the recoil that occurs during stellar mergers in interacting binaries: we find an excellent fit to the observed radial distribution of BSs, suggesting strongly that most of the BSs in M3 were formed through binary collisions in the core.

References(35)

Figures(0)

1992

C.D. Bailyn

- Astrophys.J. 392 (1992) 519

1987, Galactic Dynamics, (Princeton University Press)

J. Binney
,
S. Tremaine

1993

M. Bolte
,
J.E. Hesser
,
P.B. Stetson

- Astrophys.J. 408 (1993) L89

1994 DBH94

M.B. Davies
,
W. Benz
,
J.G. Hills

- Astrophys.J. 424 (1994) 870

Pecci, F., Cacciari, C., Corsi, C., Buonanno, R., Fahlman, G.G., Fusi &

F.R. Ferraro

1993

H.B. Richer

- Astron.Astrophys. 106 (1993) 2324

1989

J. Goodman
,
P. Hut

- Nature 339 (1989) 40

1991

H. Goodman
,
L. Hernquist

- Astrophys.J. 378 (1991) 637

1976

J.G. Hills
,
C.A. Day

- Astrophys.Lett. 17 (1976) 87

1992, AJ, 103, 1955

J.G. Hills

1983

P. Hut
,
J.N. Bahcall

- Astrophys.J. 268 (1983) 319

1983

P. Hut
,
F. Verbunt

- Nature 301 (1983) 587

1992

P. Hut
,
S.L.W. McMillan
,
R.W. Romani

- Astrophys.J. 389 (1992) 527

P. Hut
,
S. McMillan
,
J. Goodman
,
M. Mateo
,
E.S. Phinney

et al.

Binaries in globular clusters

Piet Hut
(
- Princeton, Inst. Advanced Study
)
,
Steve McMillan
(
- Drexel U.
)
,
Jeremy Goodman
(
- Princeton U. Observ.
)
,
Mario Mateo
(
- Carnegie Inst. Observ.
)
,
E.S. Phinney
(
- Caltech
)

et al.

- Publ.Astron.Soc.Pac. 104 (1992) 981
•
DOI:
- 10.1086/133085

in Blue Stragglers, ed. Sa er, R.A. (Astron. Soc. Pac. Conf. Ser.) (1993)

P. Hut

Supernovae of type I as end products of the evolution of binaries with components of moderate initial mass (M not greater than about 9 solar masses)

I. Iben, Jr.
(
- Illinois U., Urbana
)
,
A.V. Tutukov
(
- Illinois U., Urbana
)

- Astrophys.J.Suppl. 54 (1984) 335-372
•
DOI:
- 10.1086/190932

1992

C. Lauzeral
,
S. Ortolani
,
M. Auriere
,
J. Melnick

- Astron.Astrophys. 262 (1992) 63

1989, AJ, 98, 217

P.J.T. Leonard

in Blue Stragglers, ed. Sa er, R.A. (Astron. Soc. Pac. Conf. Ser.) (1993)

M. Livio

1990, AJ, 100, 469

M. Mateo
,
H.C. Harris
,
J.M. Nemec
,
E.W. Olszewski

1964

W.H. McCrea

- Mon.Not.Roy.Astron.Soc. 128 (1964) 147

1984

S. Mikkola

- Mon.Not.Roy.Astron.Soc. 207 (1984) 115

in IAU Colloq. 111, The Use of Pulsating Stars in Fundamental Problems in

J.M. Nemec

Astronomy (Cambridge: Cambridge ress), 215

E.G. Schmidt

1-25 of 35
1
2
25 / page