Protostellar cores in Sagittarius B2 N and M

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F24%3A00617519" target="_blank" >RIV/67985815:90106/24:00617519 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3847/1538-4357/ad0383" target="_blank" >https://doi.org/10.3847/1538-4357/ad0383</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/ad0383" target="_blank" >10.3847/1538-4357/ad0383</a>

Result language

angličtina

Original language name

Protostellar cores in Sagittarius B2 N and M

Original language description

We present 500 and 700 au resolution 1 and 3 mm Atacama Large Millimeter/submillimeter Array observations, respectively, of protostellar cores in protoclusters Sagittarius B2 (Sgr B2) North (N) and Main (M), parts of the most actively star-forming cloud in our Galaxy. Previous lower-resolution (5000 au) 3 mm observations of this region detected similar to 150 sources inferred to be young stellar objects (YSOs) with M > 8 M-circle dot. With a 10-fold increase in resolution, we detect 371 sources at 3 mm and 218 sources in the smaller field of view at 1 mm. The sources seen at low resolution are observed to fragment into an average of two objects. About one-third of the observed sources fragment. Most of the sources we report are marginally resolved and are at least partially optically thick. We determine that the observed sources are most consistent with Stage 0/I YSOs, i.e., rotationally supported disks with an active protostar and an envelope, that are warmer than those observed in the solar neighborhood. We report source-counting-based inferred stellar mass and the star formation rate of the cloud: 2800 M-circle dot and 0.0038 M-circle dot yr(-1) for Sgr B2 N and 6900 M-circle dot and 0.0093 M-circle dot yr(-1) for Sgr B2 M, respectively.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

—

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

961

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

20

Pages from-to

4

UT code for WoS article

001140203200001

EID of the result in the Scopus database

2-s2.0-85182358211