DOPPLER MONITORING OF THE WASP-47 MULTIPLANET SYSTEM
Name
Dai-2015-DOPPLER MONITORING O.pdf
Size
570.69 KB
Format
Adobe PDF
Checksum (MD5)
845d21bd4f0c7b4937c07acd3f13cce6
Author(s)
Dai, Fei
Arriagada, Pamela
Butler, R. Paul
Crane, Jeffrey D.
Johnson, John Asher
Shectman, Stephen A.
Teske, Johanna K.
Thompson, Ian B.
Vanderburg, Andrew
Wittenmyer, Robert A.
Date Issued
October 2015
Journal
The Astrophysical Journal. Letters
Publisher
IOP Publishing
Citation
Dai, Fei, Joshua N. Winn, Pamela Arriagada, R. Paul Butler, Jeffrey D. Crane, John Asher Johnson, Stephen A. Shectman, et al. “DOPPLER MONITORING OF THE WASP-47 MULTIPLANET SYSTEM.” The Astrophysical Journal 813, no. 1 (October 23, 2015): L9. © 2015 The American Astronomical Society
Version
Final published version
Abstract
We present precise Doppler observations of WASP-47, a transiting planetary system featuring a hot Jupiter with both inner and outer planetary companions. This system has an unusual architecture and also provides a rare opportunity to measure planet masses in two different ways: the Doppler method, and the analysis of transit-timing variations (TTV). Based on the new Doppler data, obtained with the Planet Finder Spectrograph on the Magellan/Clay 6.5 m telescope, the mass of the hot Jupiter is 370 ± 29[subscript ⊕]. This is consistent with the previous Doppler determination as well as the TTV determination. For the inner planet WASP-47e, the Doppler data lead to a mass of 12.2 ± 3.7[subscript ⊕], in agreement with the TTV-based upper limit of <22 M[subscript ⊕] (95% confidence). For the outer planet WASP-47d, the Doppler mass constraint of 10.4 ± 8.4[subscript ⊕] is consistent with the TTV-based measurement of $15.2[+6.7 over -7.6] M[subscript ⊕].
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/2041-8205/813/1/l9
