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Near-ultraviolet Excess in Slowly Accreting T Tauri Stars: Limits Imposed by Chromospheric Emission

  • Authors: Laura Ingleby, Nuria Calvet, Edwin Bergin, Gregory Herczeg, Alexander Brown, Richard Alexander, Suzan Edwards, Catherine Espaillat, Kevin France, Scott G. Gregory, Lynne Hillenbrand, Evelyne Roueff, Jeff Valenti, Frederick Walter, Christopher Johns-Krull, Joanna Brown, Jeffrey Linsky, Melissa McClure, David Ardila, Hervé Abgrall, Thomas Bethell, Gaitee Hussain, and Hao Yang

Ingleby et al. 2011 The Astrophysical Journal 743 105.

  • Provider: AAS Journals

Caption: Figure 3.

He i λ10830 profiles of RECX-1 and RECX-11. Top panel: He i observations of RECX-11 are shown from two epochs largely separated in time by 18 months. RECX-1 is shown for comparison and photospheric lines identified by the Infrared Telescope Facility (IRTF) spectral library are designated (Rayner et al. 2009). RECX-11 shows significant variability between the two observations, including a variable redshifted emission component and a broad, high-velocity redshifted absorption component, characteristic of magnetospheric infall. Bottom panel: He i λ10830 line profiles of RECX-11 after subtraction of the RECX-1 line profile. The Phoenix observation was degraded to the resolution of the CRIRES observations prior to subtraction of the RECX-1 profile. The photospheric lines are cleanly subtracted but the complex nature of the profile remains.

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