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A young pulsar with a long radio trail emerging from SNR G315.9-0.0

A young pulsar with a long radio trail emerging from SNR G315.9-0.0. F. Camilo, C.-Y. NG et al. arxiv :0908.2421v1. Introduction. Discussion. Observations and results. 01. 02. 03. 目录. Introduction. Frying pan SNR G315.9-0.0 contour 2.5 5 7.5 10 15 and 20mJy

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A young pulsar with a long radio trail emerging from SNR G315.9-0.0

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  1. A young pulsar with a long radio trail emerging from SNR G315.9-0.0 F. Camilo, C.-Y. NG et al.arxiv :0908.2421v1

  2. Introduction Discussion Observations and results 01 02 03 目录

  3. Introduction • Frying pan SNR G315.9-0.0 • contour 2.5 5 7.510 15 and 20mJy • Shell ~13'Jet like tail ~8' no IRcounterpart Mills 1981 MOST@843MHz

  4. MOST @843MHzWhiteoak&Green 1996

  5. Observations and results Image fromATCA 2.4 GHz ATNF Parkes2008 June 17 6.1 hr @1374MHzwith 288MHz BW

  6. Identified pulsar PSR J1437-5959 • P~61msDM=549pc cm-3D~8kpc(from Cordes&Lazio NE2001 electron density model)~50% linearly polarized throughout the pulse profile

  7. 9.6ks Swift observation on 2008 July 5 • only one photon within 5" of the pulsar position • NH =1.6 × 1022 cm−2photon index Γ＝1.5assume 5 photons as the limitfX < 4.5 × 10−14 erg cm−2 s−1 LX < 3.5 × 1032 d8^2 erg s−1 LX / Edot < 2.5 × 10−4 d8^2

  8. Discussion • Suggesting PSR association with the SNR • NE2001 model uncertainty for the system~25%d8 = 1 ± 0.25 • τc = 114 kyrτ114 = τ/τc • Vt = 300 d8/τ114 km s−1 • RSNR = 17 d8 pc • the SNR shell radius is small for such the age 114 kyr

  9. Sedov solution constraints on age • τ≈ 22 d85/2(n0/E51)1/2 kyrhydrogen ambient medium densityn0cm-3SN explosion kinetic energy 1051E51

  10. Other constraints on age • the trail ~RSNR = 17 d8 pc • τc = 114 kyrThe pulsar wind trail collimated for about 50kyr. Detailed study of PWN will find if it's resonable.(under way using ATCA) • If τ114 = τ/τc<<1, e.g. τ114∽0.2, Vt≈ 1500 km s−1The proper motion is µ = 8/τ114 mas yr−1 ,this could be measurable with the ATCA.

  11. PSR J1437–5959 has a very small flux density • luminosityL1.4 ≡ S1.4d2≈5d8^2 mJy kpc2now unremarkable following numerous young pulsar discoveries in recent years • Parkes multibeam survey 1997(Manchester et al. 2001)

  12. the faint tail of the populationremains out of reach in a significant Galactic volume

  13. 谢谢观赏

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