Confirmation of a ring structure in the disk around MP Mus (PDS 66) with ALMA Band 7 observations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F25%3A00646349" target="_blank" >RIV/67985815:90106/25:00646349 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1051/0004-6361/202554484" target="_blank" >https://doi.org/10.1051/0004-6361/202554484</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202554484" target="_blank" >10.1051/0004-6361/202554484</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Confirmation of a ring structure in the disk around MP Mus (PDS 66) with ALMA Band 7 observations

Popis výsledku v původním jazyce

Young stellar objects (YSOs) are surrounded by protoplanetary disks, which are the birthplace of young planets. Ring and gap structures are observed among evolved protoplanetary disks, often interpreted as a consequence of planet formation. Aims. The pre-Main Sequence (pre-MS) star MP Mus hosts one of the few known examples of protoplanetary disks within 100 pc. Previously, a disk ring structure, with a radius of 80-85 au, was detected in scattered light via near-infrared polarimetric imaging. This ring structure may be indicative of the disk clearing process. Although such ring structures were not seen in the ALMA Band 6 images, some features were detected at similar to 50 au. Methods. In this paper, we analyzed new ALMA Band 7 observations of MP Mus in order to investigate the details of its disk substructures. Results. By subtracting the continuum profile generated from Band 7 data, we discovered a ring structure in the Band 7 dust continuum image at similar to 50 au. We calculated the overall dust mass as 28.4 +/- 2.8 M circle plus at 0.89 mm and 26.3 +/- 2.6 M circle plus at 1.3 mm and the millimeter spectral index alpha 0.89-1.3 mm similar to 2.2 +/- 0.3 between 0.89 mm and 1.3 mm. Moreover, we display the spatial distribution of the spectral index (alpha mm), estimating values ranging from 1.3 at the inner disk to 4.0 at a large radius. Additionally, we observed an extended gas disk up to similar to 120 au, in contrast with a compact continuum millimeter extent of similar to 60 au. Conclusions. We conclude that there are strong indicators for an active radial drift process within the disk. However, we cannot discard the possibility of a dust evolution process and a grain growth process as responsible for the outer disk structures observed in the ALMA continuum imaging.

Název v anglickém jazyce

Confirmation of a ring structure in the disk around MP Mus (PDS 66) with ALMA Band 7 observations

Popis výsledku anglicky

Young stellar objects (YSOs) are surrounded by protoplanetary disks, which are the birthplace of young planets. Ring and gap structures are observed among evolved protoplanetary disks, often interpreted as a consequence of planet formation. Aims. The pre-Main Sequence (pre-MS) star MP Mus hosts one of the few known examples of protoplanetary disks within 100 pc. Previously, a disk ring structure, with a radius of 80-85 au, was detected in scattered light via near-infrared polarimetric imaging. This ring structure may be indicative of the disk clearing process. Although such ring structures were not seen in the ALMA Band 6 images, some features were detected at similar to 50 au. Methods. In this paper, we analyzed new ALMA Band 7 observations of MP Mus in order to investigate the details of its disk substructures. Results. By subtracting the continuum profile generated from Band 7 data, we discovered a ring structure in the Band 7 dust continuum image at similar to 50 au. We calculated the overall dust mass as 28.4 +/- 2.8 M circle plus at 0.89 mm and 26.3 +/- 2.6 M circle plus at 1.3 mm and the millimeter spectral index alpha 0.89-1.3 mm similar to 2.2 +/- 0.3 between 0.89 mm and 1.3 mm. Moreover, we display the spatial distribution of the spectral index (alpha mm), estimating values ranging from 1.3 at the inner disk to 4.0 at a large radius. Additionally, we observed an extended gas disk up to similar to 120 au, in contrast with a compact continuum millimeter extent of similar to 60 au. Conclusions. We conclude that there are strong indicators for an active radial drift process within the disk. However, we cannot discard the possibility of a dust evolution process and a grain growth process as responsible for the outer disk structures observed in the ALMA continuum imaging.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

—

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

698

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

11

Strana od-do

A165

Kód UT WoS článku

001507317300007

EID výsledku v databázi Scopus

2-s2.0-105008174894