Binaries in globular clusters

Hut, Piet; McMillan, Stephen L. W.; Goodman, Jeremy; Mateo, Mario; Phinney, E. S.; Pryor, C.; Richer, Harvey B.; Verbunt, F.; Weinberg, Martin D.

doi:10.1086/133085

Cited by 412 publications

(432 citation statements)

References 204 publications

(311 reference statements)

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“…Verbunt et al 1984;Hut et al 1992;White & Angelini 2001;in 't Zand et al 2001b). All but one (AC 211 in NGC 7078) have shown type I X-ray bursts 1 , proving they harbour neutron stars.…”

Section: A Standard Candle?mentioning

confidence: 99%

Photospheric radius expansion X-ray bursts as standard candles

Kuulkers

Hartog

Zand³

et al. 2003

A&A

378

448

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Abstract. We examined the maximum bolometric peak luminosities during type I X-ray bursts from the persistent or transient luminous X-ray sources in globular clusters. We show that for about two thirds of the sources the maximum peak luminosities during photospheric radius expansion X-ray bursts extend to a critical value of 3.79±0.15×10 38 erg s −1 , assuming the total X-ray burst emission is entirely due to black-body radiation and the recorded maximum luminosity is the actual peak luminosity. This empirical critical luminosity is consistent with the Eddington luminosity limit for hydrogen poor material. Since the critical luminosity is more or less always reached during photospheric radius expansion X-ray bursts (except for one source), such bursts may be regarded as empirical standard candles. However, because significant deviations do occur, our standard candle is only accurate to within 15%. We re-evaluated the distances to the twelve globular clusters in which the X-ray bursters reside.

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“…Verbunt et al 1984;Hut et al 1992;White & Angelini 2001;in 't Zand et al 2001b). All but one (AC 211 in NGC 7078) have shown type I X-ray bursts 1 , proving they harbour neutron stars.…”

Section: A Standard Candle?mentioning

confidence: 99%

Photospheric radius expansion X-ray bursts as standard candles

Kuulkers

Hartog

Zand³

et al. 2003

A&A

378

448

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“…When the hardware bottleneck will thus be removed, the software bottleneck for realistic cluster simulations will become painfully obvious (Hut 2007). This is the bad news.…”

Section: Direct N -Body Simulationsmentioning

confidence: 99%

Joint Discussion 6 Neutron stars and black holes in star clusters

et al. 2006

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This article was co-authored by all invited speakers at Joint Discussion 6 onNeutron Stars and Black Holes in Star Clusters, which took place during the IAU General Assembly in Prague, Czech Republic, on August 17 and 18, 2006. Each section presents a short summary of recent developments in a key area of research, incorporating the main ideas expressed during the corresponding panel discussion at the meeting.

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“…Blue stragglers are unusual types of stars that are at least compatible with being the products of stellar collision. Earlier, millisecond pulsars and X-ray binaries already have hinted to us more indirectly about the sagas of their formation and subsequent interactions [4].…”

Section: Dynamics Of Dense Stellar Systemsmentioning

confidence: 99%

Stellar Dynamics of Dense Stellar Systems

Hut¹

2001

Astrophysics and Space Science Library

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Abstract. Stellar dynamics is almost unreasonably well suited for an implementation in terms of special-purpose hardware. Unlike the case of molecular dynamics, stellar dynamics deals exclusively with a long-range force, gravity, which leads to a computational cost scaling as the square of the number of stars involved. While special tricks can lead to a reduction of this cost from ∼ N 2 to ∼ N log N in the case of very large particle numbers, such tricks are not suitable for all areas within stellar dynamics. When a stellar system is close to equilibrium, and has a very high density, it still pays to compute all interactions on a star by star basis, even for N = 10 5 . Any cN log N approach would either gloss over the subtle net effects of near-canceling interactions, driving the evolution of such a system, or would carry a prohibitively large coefficient c. This paper presents a brief introduction to the stellar dynamics of dense stellar systems, aimed at researchers using special purpose computers in other branches of physics.

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Binaries in globular clusters

Cited by 412 publications

References 204 publications

Photospheric radius expansion X-ray bursts as standard candles

Photospheric radius expansion X-ray bursts as standard candles

Joint Discussion 6 Neutron stars and black holes in star clusters

Stellar Dynamics of Dense Stellar Systems

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