Time evolution of luminosity and spin period of X-ray pulsars in the Small Magellanic Cloud

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Belinda Gibson
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Time evolution of luminoity and pin period of X-ray

Laycock1, Dimitri Chritodoulou1, Jeremy Drake2,

Harvard-Smithonian Center for Atrophyic, Cambridge,

1 Time evolution of luminoity and pin period of X-ray pular in the Small Magellanic Cloud Jun Yang1,2 Sila Laycock1, Dimitri Chritodoulou1, Jeremy Drake2, Samuel Fingerman1, Jaeub Hong2, Andrea Zeza2, Vallia Antoniou2, Malcolm Coe3, Wynn Ho3 1. Univerity of Maachuett, Lowell, MA, United State. 2. Harvard-Smithonian Center for Atrophyic, Cambridge, MA, United State. 3. Univerity of Southampton, Southampton, United Kingdom

2 Outline Pula r In SMC &Mod el duction to the library of pular in the Magellanic Cloud event lit, light curve, periodogram & pectra Why tudy pular in Magellanic Cloud: NS hold unolved problem; population-tatitical tudy. low aborption, minimum foreground contamination, known ditance (->categorize luminoity of the ). The proce of accretion and X-ray emiion in HMXB pin Known pular with combination of 3 atellite, phyical parameter ing In um e.g. SXP 348, SXP 1323 e.g. SXP 504

3 of pular in the Magellanic Cloud In SMC &Mod el Librar y pin u p /dow n Chandra Ob: XMM-Newton Ob: RXTE Weekly Ob:

4 Luminoity of X-ray pular in the Small Magellanic Cloud Librar y pin u p /dow n Obervation overview Luminoity Range: erg/ Fat pular Claify: pulating & non-pulati Luminoity (erg/) In SMC &Mod el rarely detected Faint ource Short expoure Spin Period ()

5 Luminoity of X-ray pular in the Small Magellanic Cloud Librar y pin u p /dow n Obervation overview Luminoity Range: erg/ Fat pular Claify: pulating & non-pulati Luminoity (erg/) In SMC &Mod el rarely detected Faint ource Short expoure Spin Period () O SXP 348

6 Time evolution of Source propertie with 3 atellite combination &Mode l e.g. SXP 348 Luminoi RXTE doe not have Frac info Pula r pin : Spin Ma and ty (erg/) Chandra XMM-Newton fraction Amplitud e (Count/ ) Spin Period( angular ) to momentum Significan NS ce (%) In um Modified Julian Date

7 SMC library product Pula r pin In um Amplitu de (Count/ ) Spin Period () Porbit=4.1 year Signif (%) Fraction MJD e.g. SXP 1323 Spin : /day Orbital modulation, accretion torque Orbital period (day) &Mode l Spin Period () Porbit 26 pin 17 pin down 43 out of 65 pular have meaured orbit period

Model: Off-center magnetic axi with GR effect profil e In um Rotation axi Hot pot Cone of emiion b Lomb-Scargle Power pin β Spinning axi Θ The reduced χ2 Cla 3 Phae β (deg) Photon Amplitude (count/)

8 Model: Off-center magnetic axi with GR effect profil e In um Rotation axi Hot pot Cone of emiion b Lomb-Scargle Power pin β Spinning axi Θ The reduced χ2 Cla 3 Phae β (deg) Photon Amplitude (count/) Magnetic Magnetic axi axi &Mode l SXP Obervation Cla 2 Cla 1 Period () Cla 4 Cla 3 Θ (deg) Bet fitting angle: θ = 28o and β= 52o θ : angle between pinning axi and B β : angle between pinning axi and light of ight

9 Summary & Outlook &Mode l Into pin In um of 3 atellite combination: Chandra, XMM-Newton, RXTE Known pular in SMC & LMC : event lit, pule, pectra Time evolution of their luminoitie and pin period 26 pin and 17 pin down Modeling More phenomenon into current : e.g., flow column geometry including phyic of accretion hock, accretion rate and photon energy Atroat & HXMT (Hard X-ray Modulation Telecope) Invetigate the hard X-ray ource; bright galactic pular, expand the period range of the pular

10 In SMC &Mode l Into pin In um k n a h T! u o y

12 of pular in the Magellanic Cloud &Mode l Librar y pin In um XMM-Newton Ob: Chandra Ob: RXTE Weekly Ob:

13 pin In um Number of pulation detected Into Number of pulation detected &Mode l Cumulative # of pulation detected of pular in the Magellanic Cloud XMM-Newton EPIC PN photon count Log (pule amplitude (cnt/)) with XMM-Newton Obervation

14 of pular in the Magellanic Cloud Librar y pin In um Obervation overview Amplitude # of obervation &Mode l Log (pule amplitude (cnt/)) with Chandra Obervation Log (pule amplitude (cnt/)) with XMM-Newton Obervation

15 pin In um XMM-Newton EPIC PN photon count Delt_P/P Jun Yang Number of pulation detected &Mode l Cumulative # of pulation detected SMC library product Spin Period () Period deviation

16 of pular in the Magellanic Cloud Obervation overview Jun Yang Librar y pin Propeller line (P-line) in Magellanic high ma X-ray binarie; Did not find the pulation below the P-line Luminoity (erg/) &Mode l Corbet gap Spin Period() O SXP 348

17 Make &Model Jun Yang In um Make δp/p pin δp/p Into Spin Period () Spin Period ()

18 Make &Model Jun Yang Into pin In um Make

19 Make &Model Jun Yang Into pin Luminoi ty (erg/) fraction Amplitud e (Count/ ) Spin Period( ) Signif (%) In um Make MJD SXP 1323 Spin : /day

20 Make &Model Jun Yang pin In um Make Luminoity (erg/) Into Spin Period ()

21 Atroat Broadband Spectrocopic tudie of X-ray ource

A multi-observatory database of X-ray pulsars in the Magellanic Clouds

Astron. Nachr. / AN -, No. -, 1 6 (217) / DOI 1.12/asna.21713334 A multi-observatory database of X-ray pulsars in the Magellanic Clouds J. Yang 1,2,3, S. G. T. Laycock 1,2, J. J. Drake 3, M. J. Coe 4,