1 / 9

Accretion Channeling in CTTS

Accretion Channeling in CTTS. Scott Gregory, Moira Jardine. Classical T Tauri Stars (CTTS). (Goodson et al. 1997). Magnetic Field Detection in CTTS. Surface fields of 1-3 kG detected from: Zeeman broadened spectral lines (e.g. Johns-Krull et al. 1999) . Circularly polarised lines

velika
Download Presentation

Accretion Channeling in CTTS

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. Accretion Channeling in CTTS Scott Gregory, Moira Jardine

  2. Classical T Tauri Stars (CTTS) (Goodson et al. 1997)

  3. Magnetic Field Detection in CTTS • Surface fields of 1-3 kG detected from: • Zeeman broadened spectral lines • (e.g. Johns-Krull et al. 1999). • Circularly polarised lines • Increased line equivalent widths • (e.g. Guenther et al. 1999). • Electron-cyclotron maser emission • (Smith et al. 2003).

  4. Accreting Field Extrapolations • LQ Hya surface map. • Potential field extrapolation with source surface. • Isothermal corona in hydrostatic equilibrium. (Gregory et al. 2004, in preparation)

  5. Accreting Field Extrapolations • AB Dor surface map. • Potential field extrapolation with source surface. • Isothermal corona in hydrostatic equilibrium. (Gregory et al. 2004, in preparation)

  6. Accretion Footpoints Latitude Longitude Latitude Longitude

  7. LQ Hya like field. AB Dor like field. Future Work: X-ray Emission

  8. LQ Hya like field. AB Dor like field. Future Work: X-ray Emission

  9. Future Work • ESPaDOnS(Echelle SpectroPolarimetric Device for the Observation of Stars at CFHT): • Observations of DF Tau and BP Tau (plus V410 Tau and V830 Tau) in 2005. (Petit, Donati & the ESPaDOnS project team 2004) • Magnetospheric accretion models with potential field extrapolations.

More Related