The Ophiuchus DIsk Survey Employing ALMA (ODISEA): Complete Size Distributions for the 100 Brightest Disks across Multiplicity and Spectral Energy Distribution Classes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F25%3A00646370" target="_blank" >RIV/67985815:90106/25:00646370 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3847/2041-8213/adb03c" target="_blank" >https://doi.org/10.3847/2041-8213/adb03c</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/2041-8213/adb03c" target="_blank" >10.3847/2041-8213/adb03c</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Ophiuchus DIsk Survey Employing ALMA (ODISEA): Complete Size Distributions for the 100 Brightest Disks across Multiplicity and Spectral Energy Distribution Classes

Popis výsledku v původním jazyce

The size of a protoplanetary disk is a fundamental property, yet most remain unresolved, even in nearby star-forming regions (d similar to 140-200 pc). We present the complete continuum size distribution for the 105 brightest protoplanetary disks (M-dust greater than or similar to 2 M-circle plus) in the Ophiuchus cloud, obtained from ALMA Band 8 (410 GHz) observations at 0.'' 05 (7 au) to 0.'' 15 (21 au) resolution. This sample includes 54 Class II and 51 Class I and flat-spectrum sources, providing a comprehensive distribution across evolutionary stages. We measure the half-width at half-maximum and the radius encircling 68% of the flux (R-68%) for most nonbinary disks, yielding the largest flux-limited sample of resolved disks in any star-forming region. The distribution is log-normal with a median value of similar to 14 au and a logarithmic standard deviation sigma log=0.46 (factor of 2.9 in linear scale). Disks in close-binary systems (<200 au separation) have smaller radii, with a median value of similar to 5 au, indicating efficient radial drift as predicted by dust evolution models. The size distribution for young embedded objects (spectral energy distribution Class I and flat spectrum, age less than or similar to 1 Myr) is similar to that of Class II objects (age similar to a few Myr), implying that pressure bumps must be common at early disk stages to prevent millimeter-sized particle migration at astronomical unit scales.

Název v anglickém jazyce

The Ophiuchus DIsk Survey Employing ALMA (ODISEA): Complete Size Distributions for the 100 Brightest Disks across Multiplicity and Spectral Energy Distribution Classes

Popis výsledku anglicky

The size of a protoplanetary disk is a fundamental property, yet most remain unresolved, even in nearby star-forming regions (d similar to 140-200 pc). We present the complete continuum size distribution for the 105 brightest protoplanetary disks (M-dust greater than or similar to 2 M-circle plus) in the Ophiuchus cloud, obtained from ALMA Band 8 (410 GHz) observations at 0.'' 05 (7 au) to 0.'' 15 (21 au) resolution. This sample includes 54 Class II and 51 Class I and flat-spectrum sources, providing a comprehensive distribution across evolutionary stages. We measure the half-width at half-maximum and the radius encircling 68% of the flux (R-68%) for most nonbinary disks, yielding the largest flux-limited sample of resolved disks in any star-forming region. The distribution is log-normal with a median value of similar to 14 au and a logarithmic standard deviation sigma log=0.46 (factor of 2.9 in linear scale). Disks in close-binary systems (<200 au separation) have smaller radii, with a median value of similar to 5 au, indicating efficient radial drift as predicted by dust evolution models. The size distribution for young embedded objects (spectral energy distribution Class I and flat spectrum, age less than or similar to 1 Myr) is similar to that of Class II objects (age similar to a few Myr), implying that pressure bumps must be common at early disk stages to prevent millimeter-sized particle migration at astronomical unit scales.

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

Astrophysical Journal Letters

ISSN

2041-8205

e-ISSN

2041-8213

Svazek periodika

981

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

L4

Kód UT WoS článku

001440394500001

EID výsledku v databázi Scopus

2-s2.0-86000147559