GALACTIC ASTRONOMY I: SNe and SNR II: PULSARS

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GALACTIC ASTRONOMY (I) SNe and SNR(II) PULSARS

• _____________________________
• Jon Marcaide

ASI, Castel San Pietro Terme, 18 September 2001
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GALACTIC ASTRONOMY (I) SNe and SNR
JON MARCAIDE ASI, 18 Sept 2001 Castel San Pietro
Terme
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Does radiointerferometry, and in particular
VLBI, have anything to add to the picture?
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SNR in M82

• Muxlow et al. MNRAS 266, 455 (1994)
• Pedlar et al. MNRAS 307, 761 (1999)
• McDonald et al. MNRAS 322, 100 (2001)

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SNR in M82

• Muxlow et al. MNRAS 266, 455 (1994) (MERLIN 6cm,
  50mas resol, 23 sources / 15 SNR candidates)
• Pedlar et al. MNRAS 307, 761 (1999) (EVN 18cm,
  15mas (0.2pc), 5 SNR in detail, all size lt 1pc
  expansion of 43.31592 10,000km/s (1mas/yr)
  v(41.95575) lt 4000 km/s) ages ranging from
  decades to hundreds of years)

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SNR in M82

• Muxlow et al.
• Pedlar et al.
• McDonald et al. MNRAS 322, 100 (2001)
  (20-station VLBI 18cm, 3mas, deceleration of
  43.31592 mgt0.73 vradial(41.95575)lt2000 km/s
  41.95575 a compact, young SNR in a dense medium?
  Perhaps not.

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NGC 2146

• Tarchi et al. AA (2000) (MERLINVLA-6cm,
  detect 18 sources, resolve 7 only 3 have
  spectral indices expected for SNR, others compact
  HII?)

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• M.A. Pérez-Torres, Ph. D. thesis, Univ. Valencia
  (1999)
• Pérez-Torres, Alberdi Marcaide, AA 374,
  997-1002 (2001)
• Mioduszewski, Dwarkadas Ball,
• ApJ (2001), in press

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SN 1986J

• Bartel, Rupen, Shapiro ApJ 337, L85 (1989)
• Bartel et al. Nature 350, 212 (1991)
• Deviations from spherical symmetry

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