We present high resolution Karl G. Jansky Very Large Array (VLA) observations of the protostar L1527 IRS at 7 mm, 1.3 cm, and 2 cm wavelengths. We detect the edge-on dust disk at all three wavelengths and find that it is asymmetric, with the southern side of the disk brighter than the northern side. We confirm this asymmetry through analytic modeling and also find that the disk is flared at 7 mm. We test the data against models including gap features in the intensity profile, and though we cannot rule such models out, they do not provide a statistically significant improvement in the quality of fit to the data. From these fits, we can however place constraints on allowed properties of any gaps that could be present in the true, underlying intensity profile. The physical nature of the asymmetry is difficult to associate with physical features due to the edge-on nature of the disk, but could be related to spiral arms or asymmetries seen in other imaging of more face-on disks.
@article{arxiv.2206.13548,
title = {A VLA View of the Flared, Asymmetric Disk Around the Class 0 Protostar L1527 IRS},
author = {Patrick D. Sheehan and John J. Tobin and Zhi-Yun Li and Merel L. R. van 't Hoff and Jes K. Jørgensen and Woojin Kwon and Leslie W. Looney and Nagayoshi Ohashi and Shigehisa Takakuwa and Jonathan P. Williams and Yusuke Aso and Sacha Gavino and Itziar de Gregorio-Monsalvo and Ilseung Han and Chang Won Lee and Adele Plunkett and Rajeeb Sharma and Yuri Aikawa and Shih-Ping Lai and Jeong-Eun Lee and Zhe-Yu Daniel Lin and Kazuya Saigo and Kengo Tomida and Hsi-Wei Yen},
journal= {arXiv preprint arXiv:2206.13548},
year = {2022}
}
Comments
20 pages, 5 figures, 3 tables; accepted for publication in the Astrophysical Journal