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ALMA Band 9 CO(6–5) Reveals a Warm Ring Structure Associated with the Embedded Protostar in the Cold Dense Core MC 27/L1521F

  • Authors: Kazuki Tokuda, Mitsuki Omura, Naoto Harada, Ayumu Shoshi, Naofumi Fukaya, Toshikazu Onishi, Kengo Tachihara, Kazuya Saigo, Tomoaki Matsumoto, Yasuo Fukui, Akiko Kawamura, Masahiro N. Machida

Kazuki Tokuda et al 2026 The Astrophysical Journal Letters 1001 .

  • Provider: AAS Journals

Caption: Figure 1.

Top: mean CO(J = 6–5) spectra extracted from a circular aperture of radius 5″ centered at (ICRS) ﹩\alpha =0{4}^{{\rm{h}}}2{8}^{{\rm{m}}}39\mathop{.}\limits^{{\rm{s}}}97﹩, ﹩\delta =+26^\circ 5{1}^{{\prime} }21\mathop{.}\limits{^{\prime\prime} }5﹩. The systemic velocity of the core, Vsys = 6.5 km s−1, is indicated by the vertical dotted line. Bottom: mean CO(J = 3–2) spectrum obtained with the previous study (K. Tokuda et al. 2018), averaged within a circular aperture of radius 10″ centered at the same position. The black histogram shows the Total Power (TP) spectrum, while the blue histogram shows the ALMA 12 m array spectrum. Both spectra are displayed at a velocity resolution of 0.85 km s−1.

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