Determining Dust Properties in Protoplanetary Disks: SED-derived Masses and Settling With ALMA

Rilinger, Anneliese M.; Espaillat, Catherine; Xin, Zi-Hua; Ribas, Álvaro; Macías, Enrique; Luettgen, Sarah

doi:10.48550/arxiv.2211.16732

Cited by 1 publication

(3 citation statements)

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“…The marginalized distribution of ò (Figure 2(d)) shows a preference toward the lower end, indicating overall high levels of dust settling for our sample. This finding is consistent with previous work using SED modeling that has found that dust is depleted by up to 1000 times relative to the interstellar medium (Grant et al 2018;Ribas et al 2020) with the same levels of high depletion found in regions across the 1-10 Myr age range (Rilinger et al 2022). This evidence of significant dust settling supports that planet formation may may be well underway by 1 Myr.…”

Section: Analysis and Resultssupporting

confidence: 92%

“…The median ratios between the SED-derived disk masses and the millimeter-derived disk masses for the entire sample at all ALMA wavelengths are 1.5-5.4 for Figures 4(a)-(c), and 1.5-2.1 in Figure 4(d). As also seen in Rilinger et al (2022), the discrepancy between the M (b), R disk (c), ò (d), a max,midplane (e), a max,upper (f), M disk (g), and M disk /M * (h). The error bars represent 16th and 84th percentiles.…”

Section: Comparison To Disk Dust Masses In the Literaturesupporting

confidence: 61%

“…Ballering & Eisner (2019), Ribas et al (2020), Liu et al (2022), andRilinger et al (2022) found that disk masses derived from SED modeling are higher than those derived from millimeter flux densities alone, and they attributed this to optical depth effects. Masses derived from a single millimeter flux density measurement depend on the assumption that the disk is optically thin at that wavelength; if the disk is optically thick, this assumption results in an underestimate of the disk mass because the measurement is not sensitive to all of the dust.…”

Section: The Effect Of Disk Optical Depth On Measured Dust Massesmentioning

confidence: 99%

See 2 more Smart Citations

Measuring the Dust Masses of Protoplanetary Disks in Lupus with ALMA: Evidence That Disks Can Be Optically Thick at 3 mm

Espaillat

Rilinger

et al. 2022

ApJ

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Accurate disk mass measurements are necessary to constrain disk evolution and the timescale of planet formation, but such measurements are difficult to make and are very dependent on assumptions. Here, we look at the assumption that the disk is optically thin at radio wavelengths and the effect of this assumption on measurements of disk dust mass. We model the optical to radio spectral energy distributions of 41 protoplanetary disks located in the young (∼1–3 Myr old) Lupus star-forming region, including 0.89 1.33 and 3 mm flux densities when available. We measure disk dust masses that are ∼1.5–6 times higher than when using the commonly adopted disk dust mass equation under the assumption of optically thin emission in the (sub)millimeter range. The cause of this discrepancy is that most disks are optically thick at millimeter wavelengths, even up to 3 mm, demonstrating that observations at longer wavelengths are needed to trace the fully optically thin emission of disks.

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Section: Analysis and Resultssupporting

confidence: 92%

Section: Comparison To Disk Dust Masses In the Literaturesupporting

confidence: 61%