Figure 9 from The CIDA Variability Survey of Orion OB1. II. Demographics of the Young, Low-mass Stellar Populations

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The CIDA Variability Survey of Orion OB1. II. Demographics of the Young, Low-mass Stellar Populations

Authors: César Briceño, Nuria Calvet, Jesús Hernández, A. Katherina Vivas, Cecilia Mateu, Juan José Downes, Jaqueline Loerincs, Alice Pérez-Blanco, Perry Berlind, Catherine Espaillat, Lori Allen, Lee Hartmann, Mario Mateo, and John I. Bailey III

2019 The Astronomical Journal 157 85.

Provider: AAS Journals

Caption: Figure 9.

Spectra of two newly confirmed early M-type TTS members of Orion, obtained with the M2FS spectrograph on the 6.5 m Magellan Clay telescope. Left: an M0 WTTS, which has W(Hα) ﹩=\,-2.2﹩ Å and W(Li I) ﹩=\,0.4﹩ Å. In both spectra, the S/N is ﹩\gtrsim 50﹩. Right: an accreting CTTS, with W(Hα) ﹩=\,-139﹩ Å and W(Li I) ﹩=\,0.4﹩ Å. In addition to the strong Hα line, the He I line can also be seen in emission at 5876 Å and 6876 Å, as well as at [O I] 6300 Å.

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