Modeling of CO Rovibrational Line Emission of HD 141569
Abstract
HD 141569 is a Herbig Ae/Be star that straddles the boundary between the transition disks and debris disks. It is a low dust mass disk that reveals numerous structural elements (e.g., gaps and rings) that may point to young planets. It also exhibits a reservoir of CO gas observed at both millimeter and IR wavelengths. Previous observations reported a possible asymmetry in the CO gas emission. Herein the IR rovibrational emission lines are analyzed and modeled both spectroscopically and spectroastrometrically. We find emission features from both 12CO and 13CO isotopologues heated to a temperature of approximately 200 K in the radial extent of 13-60 au. We do not see evidence of the previously reported asymmetry in CO emission, our results being consistent with a Keplerian, axisymmetric emitting region. This raises the question of whether the emission profile may be evolving in time, possibly as a result of an orbiting feature in the inner disk such as a planet.
- Publication:
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Publications of the Astronomical Society of the Pacific
- Pub Date:
- October 2021
- DOI:
- 10.1088/1538-3873/ac21a2
- arXiv:
- arXiv:2109.06128
- Bibcode:
- 2021PASP..133j4402J
- Keywords:
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- 1300;
- 2095;
- 723;
- 1241;
- 492;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 28 pages, 18 figure. Accepted for publication in PASP