Multiple shells driven by disk winds: ALMA observations in the HH 30 outflow

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F24%3A00617498" target="_blank" >RIV/67985815:90106/24:00617498 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3847/1538-4357/ad132a" target="_blank" >https://doi.org/10.3847/1538-4357/ad132a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/ad132a" target="_blank" >10.3847/1538-4357/ad132a</a>

Result language

angličtina

Original language name

Multiple shells driven by disk winds: ALMA observations in the HH 30 outflow

Original language description

We present archival Atacama Large Millimeter/submillimeter Array band 6 observations of the 13CO (J = 2-1) and 12CO (J = 2-1) molecular line emission of the protostellar system associated with HH 30. The 13CO molecular line shows the accretion disk while the molecular outflow is traced by the emission of the 12CO molecular line. We estimated a dynamical mass for the central object of 0.45 +/- 0.14 M circle dot, and a mass for the molecular outflow of (1.83 +/- 0.19) x 10-4 M circle dot. The molecular outflow presents an internal cavity as well as multiple outflowing shell structures. We distinguish three different shells with constant expansion (similar to 4-6 km s-1) and possible rotation signatures (<= 0.5 km s-1). We find that the shells can be explained by magnetocentrifugal disk winds with launching radii R launch less than or similar to 4 au and a small magnetic lever arm lambda similar to 1.6-1.9. The multiple shell structure may be the result of episodic ejections of the material from the accretion disk associated with three different epochs with dynamical ages of 497 +/- 15 yr, 310 +/- 9 yr, and 262 +/- 11 yr for the first, second, and third shells, respectively. The outermost shell was ejected 187 +/- 17 yr before the middle shell, while the middle shell was launched 48 +/- 14 yr before the innermost shell. Our estimations of the linear and angular momentum rates of the outflow as well as the accretion luminosity are consistent with the values expected if the outflow of HH 30 is produced by a wide-angle disk wind.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

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Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Volume of the periodical

962

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

17

Pages from-to

28

UT code for WoS article

001155466400001

EID of the result in the Scopus database

2-s2.0-85183993252