1 / 16

Martín A. Guerrero You-Hua Chu Robert A. Gruendl Univ. of Illinois

X-ray Emission from PNe. Martín A. Guerrero You-Hua Chu Robert A. Gruendl Univ. of Illinois. APN III, Mt Rainier, 7/30/03. X-ray Expectations. In a simple, adiabatic shock, it is possible to generate X-ray emitting plasma: T X ~ 1.5 10 7 K (v/1000 km/s) 2

tahlia
Télécharger la présentation

Martín A. Guerrero You-Hua Chu Robert A. Gruendl Univ. of Illinois

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. X-ray Emission from PNe Martín A. GuerreroYou-Hua Chu Robert A. Gruendl Univ. of Illinois APN III, Mt Rainier, 7/30/03

  2. X-ray Expectations In a simple, adiabatic shock, it is possible to generate X-ray emitting plasma: TX ~ 1.5107 K (v/1000 km/s)2 PN central stars have fast stellar winds with terminal velocities up to 4,000 km/s ==> TX ~ 108 K PNe show fast collimated outflows with velocities >1,000 km/s (e.g. Hen 3-1475) ==> TX ~ 107 K Coronalactivityfrom AGB stars or binary companions

  3. ROSAT Observations of PNe ROSAT made useful observations of >60 PNe (Guerrero, Chu, & Gruendl 2000) Only three PNe were marginally resolved A 30 -- Chu et al. 1997 BD +30º3639 -- Leahy et al. 2000 NGC 6543 -- Kreysing et al. 1992 Two additional PNe showed a hard X-ray component NGC 7293 -- Leahy et al. 1994 NGC 7009 -- Guerrero et al. 2000 Chandra spatial resolution -- 15 times sharper XMM collecting area -- 15 times larger Spectral resolution -- 10 times better

  4. Chandra and XMM Observations of PNe Chandra and XMM observations of 14 PNe 6 detections of diffuse X-ray emission BD+30 3639 -- Kastner et al. 2000 NGC 6543 -- Chu et al. 2001 NGC 7027 -- Kastner et al. 2001 NGC 7009 -- Guerrero et al. 2002 Mz 3 -- Kastner et al. 2003 Hen 3-1475 -- Sahai, this meeting 3(4?) detections of point sources at the central star NGC 6543, NGC 7293 -- Guerrero et al. 2001 Mz 3 -- Kastner et al. 2003 Hen 3-1475 (?) -- this talk 4 non-detections of diffuse X-ray emission Hen 2-90, M 1-16, NGC 246, NGC 7293

  5. PNe with Diffuse X-ray Emission NGC 6543 -- Chu et al. 2001; Guerrero et al. 2001 B = X-ray, R= H-alpha, G = [N II]

  6. PNe with Diffuse X-ray Emission NGC 7009 -- Guerrero et al. 2002

  7. PNe with Diffuse X-ray Emission BD+30 3639 Kastner, Soker, Vrtilek, & Dgani 2000 NGC 7027 Kastner, Vrtilek, & Soker 2001

  8. PNe with Diffuse X-ray Emission Mz 3 -- Kastner et al. 2003

  9. PNe with Diffuse X-ray Emission Hen 3-1475, Sahai (this meeting)

  10. PNe with Diffuse X-ray Emission

  11. X-ray Spectra of Hot Gas in PNe NGC 7009 T=1.7106 K Mz 3 T=3-6106 K Hen 3-1475 T=2.4106 K=>400 km s-1 BD+30 3639 T=3.0106 K NGC 7027 T=3106 K NGC 6543 T=1.8106 K

  12. Chandra and XMM-Newton Analysis of PNe Morphology LX (erg/s) T (106 K) N (cm-3) NGC 7009 -- ~31031 1.7 20 NGC 6543 limb-bright. 1.01032 1.8 50 NGC7027 bipolar? ~ 1032 ~3 150 BD+30 3639 -- 1.31032 3 200 Mz 3 bipolar-jet? 31031 3-6 -- Hen 3-1475 -- ~1033 2.4 --

  13. PNe without Diffuse X-ray Emission … PNe with modest velocity collimated outflows: Hen 2-90, M 1-16 Evolved PNe: NGC 246, NGC 7293 … but NGC 7293 central star!

  14. … and also a Symbiotic Star with Bipolar Nebula Hen 2-104

  15. PNe with X-ray-emitting Central Stars Chandra revealed hard X-ray point sources at the central stars of NGC 7293 and NGC 6543 (Guerrero et al. 2001) NGC 7293 central star shows variability in X-rays, as well as in the H-alpha line (Gruendl et al. 2001) Coronal activity from an unseen companion star (Guerrero et al. 2001; Soker & Kastner 2002) NGC 6543: a companion star or shocks in its fast stellar wind More recently, Mz 3 (Kastner et al. 2003), and maybe Hen 3-1475

  16. X-rays from PNe in a Nutshell (so far) • Sharp shell morphology • Young PNe (X-rays don’t last long) • Central stars • Fast collimated outflows (I mean, real fast) • Something is going on along the major axis 4 more PNe have been observed by Chandra and 12 more will be observed by Chandra and XMM

More Related