期刊
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
卷 133, 期 1028, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1538-3873/ac21a2
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资金
- National Aeronautics and Space Administration
- National Aeronautics and Space Administration [80HQTR19D0030]
The study analyzed the CO gas emission of the HD 141569 star, finding no evidence of the previously reported asymmetry and suggesting a Keplerian, axisymmetric emitting region. The possibility of orbital features in the inner disk leading to an evolving emission profile over time was raised.
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 (CO)-C-12 and (CO)-C-13 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.
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