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Transient X-ray Binaries In Transient X-ray Binaries In

Transient X-ray Binaries In - PowerPoint Presentation

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Transient X-ray Binaries In - PPT Presentation

Centaurus A July 15 2010 Accretion Workshop Cambridge Massachusetts Gregory R Sivakoff UVa Chandra Cen A Very Large Project Team A Galaxys Cookbook A Population of XRay Binaries ID: 778604

2010 accretion massachusetts july accretion 2010 july massachusetts sources ray timescales cambridge workshop processes rays white dwarfs quasars xrbs

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Slide1

Transient X-ray Binaries In

Centaurus

A

July 15, 2010: Accretion WorkshopCambridge, Massachusetts

Gregory R. Sivakoff (

UVa

)

Chandra

Cen

A-

Very Large Project Team

Slide2

A Galaxy’s Cookbook

A Population of X-Ray Binaries

Start With A Galaxy’s Stellar IMF

#

NSs/BHs

Stir In Stellar Dynamics# Binaries FormBake With Stellar Evolution & Binary Evolution For A Few Million/Billion Years# HMXBS/LMXBs FormTop With Accretion Physics# XRBs Emitting At A Given LX

July 15, 2010: Accretion Workshop

Cambridge, Massachusetts

Slide3

July 15, 2010: Accretion WorkshopCambridge, Massachusetts

King 2006

X-ray Binary Variability

Soft X-ray Transients

Disk Instability + Irradiation + Disk Size

Slide4

X-ray Binary Variability

Soft X-ray Transients

Disk Instability + Irradiation + Disk Size

Most Outbursts Are Short, But Some > 10 yr(e.g., GRS1915, KS1731)

Mar. 4, 2010: HEAD Meeting, Waikoloa, Hawaii

Aql X1EXO1745-248GX339-4200120032001

2003

2001

2003

Year

L

X,0.3-10

kev

(erg/

s

)

5×10

37

1×10

38

Slide5

Galactic/Extragalactic Studies ofXRBs are Complementary

Galactic

Extragalactic

Sensitivity For

Quiescent

XRBSActive

XRBs

Active

XRBs

Orbital Param.

Some Known

Mostly Unknown

Absorption

Variable Column

Constant Column

Distance

~1/3 Known

Same / gal.

Field-Of-View

All-Sky

Chandra

-Sized

Sample Size

Limited

10s – 100s per

gal.

July 15, 2010: Accretion Workshop

Cambridge, Massachusetts

Slide6

July 15, 2010: Accretion Workshop

Cambridge, Massachusetts

Slide7

Mar. 4, 2010: HEAD Meeting, Waikoloa, Hawaii

1999 Dec 05

2000 May 17

2002 Sep 03

2003 Sep 14

2007 Mar 272007 Mar 222007 Mar 302007 Apr 172007 May 082007 May 30

Slide8

The Importance Of Being Variable

Sivakoff et al. 2008 + Updates

Steep Power Law State

Thermal State

July 15, 2010: Accretion Workshop

Cambridge, Massachusetts

Slide9

GX 339-4 Like Sources?

July 15, 2010: Accretion Workshop

Cambridge, Massachusetts

Slide10

But, Persistence Dominates

July 15, 2010: Accretion Workshop

Cambridge, Massachusetts

Slide11

NGC 4697: Sivakoff et al.

NGC 4365: Sivakoff et al.

… In Many

Galaxies

Accretion Processes in X-Rays:

From White Dwarfs to Quasars

Slide12

… In Many

Galaxies

Accretion Processes in X-Rays:From White Dwarfs to Quasars

Slide13

Where Do We Go From Here?

Fainter Sources, Month-Year Timescales

Brighter Sources, Decade Timescales

Accretion Processes in X-Rays:From White Dwarfs to Quasars

XLF of 14 E/

SOs: Kim & Fabbiano 2003

Slide14

Where Do We Go From Here?

Fainter Sources, Month-Year Timescales

Brighter Sources, Decade Timescales

Accretion Processes in X-Rays:From White Dwarfs to Quasars

Chandra X-ray

Observatory

Slide15

Where Do We Go From Here?

Fainter Sources, Month-Year Timescales

Bright Sources, Decade Timescales

Week TimescalesAccretion Processes in X-Rays:From White Dwarfs to Quasars

L

X,0.3-10 kev (erg/s)5×10371×103820032001YearAQL X-1

Slide16

Where Do We Go From Here?

Fainter Sources, Month-Year Timescales

Bright Sources, Decade Timescales

Week TimescalesAccretion Processes in X-Rays:From White Dwarfs to Quasars

Wide Field

X-ray Telescope

Slide17

Take-Away Points

There Is A Wealth Of XRB Data In

Cen A

Variability Reveals Black Hole CandidatesSources Largely PersistentSources Largely NS XRBs

?

Missing Short Timescale Transient XRBs?BH XRBs Are Long Timescale Transients?Accretion Theory Is Missing Something?July 15, 2010: Accretion WorkshopCambridge, Massachusetts

Slide18

Thank You

Thank You

July 15, 2010: Accretion Workshop

Cambridge, Massachusetts