Models of Rotating Infall for the B335 Protostar
Research output: Contribution to journal › Journal article › Research › peer-review
Documents
- Evans_II_2023_ApJ_943_90
Final published version, 1.94 MB, PDF document
Models of the protostellar source, B335, are developed using axisymmetric three-dimensional models to resolve conflicts found in one-dimensional models. The models are constrained by a large number of observations, including ALMA, Herschel, and Spitzer data. Observations of the protostellar source B335 with ALMA show redshifted absorption against a central continuum source indicative of infall in the HCO+ and HCN J = 4 -> 3 transitions. The data are combined with a new estimate of the distance to provide strong constraints to three-dimensional radiative transfer models including a rotating, infalling envelope, outflow cavities, and a very small disk. The models favor ages since the initiation of collapse between 3 x 10(4) and 4 x 10(4) yr for both the continuum and the lines, resolving a conflict found in one-dimensional models. The models underpredict the continuum emission seen by ALMA, suggesting an additional component such as a pseudo-disk. The best-fitting model is used to convert variations in the 4.5 mu m flux in recent years into a model for a variation of a factor of 5-7 in luminosity over the last 8 yr.
Original language | English |
---|---|
Article number | 90 |
Journal | Astrophysical Journal |
Volume | 943 |
Issue number | 2 |
Number of pages | 17 |
ISSN | 0004-637X |
DOIs | |
Publication status | Published - 1 Feb 2023 |
- YOUNG STELLAR OBJECTS, SPECTRAL ENERGY-DISTRIBUTIONS, MASS STAR-FORMATION, ALMA OBSERVATIONS, EVOLUTIONARY SIGNATURES, RADIO-CONTINUUM, AU SCALE, COLLAPSE, ASTROPY, PROJECT
Research areas
Number of downloads are based on statistics from Google Scholar and www.ku.dk
ID: 337792954