Disk and Envelope Streamers of the GGD27-MM1 Massive Protostar
M. Fern\'andez-L\'opez (1), J. M. Girart (2, 3), J. A., L\'opez-V\'azquez (4), R. Estalella (5), G. Busquet (5, 6, 3), S. Curiel (7),, N. A\~nez-L\'opez (8) ((1) Instituto Argentino de Radioastronom\'ia,, Argentina (2) Institut de Ci\`encies de l'Espai, Catalunya, (3) Institut

TL;DR
This study uses high-resolution ALMA observations to analyze the structure and dynamics of the disk, envelope, and potential accretion streamers around the massive protostar GGD27-MM1, revealing complex molecular and dust features.
Contribution
It provides a detailed characterization of the disk, envelope, and streamers in GGD27-MM1, including temperature, density maps, and a theoretical model of the accretion structures, which advances understanding of high-mass star formation.
Findings
Identification of disk extending up to 190 au
Detection of possible accretion streamers in molecular tracers
Evidence of an inner zone devoid of molecular content
Abstract
We present new Atacama Large (sub)Millimeter Array 0.98 mm observations of the continuum emission and several molecular lines toward the high-mass protostellar system GGD27-MM1, driving the HH 80-81 radio-jet. The detailed analysis of the continuum and the CHCN molecular emission allows us to separate the contributions from the dust content of the disk (extending up to 190 au), the molecular content of the disk (extending from 140 to 360 au), and the content of the envelope, revealing the presence of several possible accretion streamers (also seen in other molecular tracers, such as CHOH). We analyze the physical properties of the system, producing temperature and column density maps, and radial profiles for the disk and the envelope. We qualitatively reproduce the trajectories and line-of-sight velocities of the possible streamers using a theoretical model approach. An ad-hoc…
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Space Exploration and Technology · Astro and Planetary Science
