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Title: ANALYSIS OF SPIN-ORBIT ALIGNMENT IN THE WASP-32, WASP-38, AND HAT-P-27/WASP-40 SYSTEMS

Abstract

We present measurements of the spin-orbit alignment angle, {lambda}, for the hot Jupiter systems WASP-32, WASP-38, and HAT-P-27/WASP-40, based on data obtained using the HARPS spectrograph. We analyze the Rossiter-McLaughlin effect for all three systems and also carry out Doppler tomography for WASP-32 and WASP-38. We find that WASP-32 (T {sub eff} = 6140{sup +90} {sub -100} K) is aligned, with an alignment angle of {lambda} = 10.{sup 0}5{sup +6.4} {sub -6.5} obtained through tomography, and that WASP-38 (T {sub eff} = 6180{sup +40} {sub -60} K) is also aligned, with tomographic analysis yielding {lambda} = 7.{sup 0}5{sup +4.7} {sub -6.1}. The latter result provides an order-of-magnitude improvement in the uncertainty in {lambda} compared to the previous analysis of Simpson et al. We are only able to loosely constrain the angle for HAT-P-27/WASP-40 (T{sub eff} = 5190{sup +160} {sub -170} K) to {lambda} = 24.{sup 0}2{sup +76.0}{sub -44.5}, owing to the poor signal-to-noise ratio of our data. We consider this result a non-detection under a slightly updated version of the alignment test of Brown et al. We place our results in the context of the full sample of spin-orbit alignment measurements, finding that they provide further support for previously establishedmore » trends.« less

Authors:
; ; ;  [1];  [2]; ; ; ; ;  [3];  [4]; ; ;  [5];  [6];  [7];  [8]
  1. SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS (United Kingdom)
  2. LAM (Laboratoire d'Astrophysique de Marseille), Aix Marseille Universite, CNRS, UMR 7326, F-13388 Marseille (France)
  3. Astrophysics Group, School of Physical and Geographical Sciences, Lennard-Jones Building, Keele University, Staffordshire ST5 5BG (United Kingdom)
  4. Institut d'Astrophysique et de Geophysique, Universite de Liege, Allee du 6 Aout, 17 (Bat. B5C) Sart Tilman, B-4000 Liege (Belgium)
  5. Observatoire Astronomique de l'Universite de Geneve, 51 Chemin des Maillettes, CH-1290 Sauverny (Switzerland)
  6. Astrophysics Research Centre, School of Mathematics and Physics, Queen's University, University Road, Belfast BT7 1NN (United Kingdom)
  7. Centro de Astrofisica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto (Portugal)
  8. Institut dAstrophysique de Paris, UMR7095 CNRS, Universite Pierre and Marie Curie, 98bis boulevard Arago, F-75014 Paris (France)
Publication Date:
OSTI Identifier:
22086219
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 760; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALIGNMENT; ASTRONOMY; ASTROPHYSICS; DOPPLER EFFECT; ORBITS; PLANETS; RADIAL VELOCITY; SIGNAL-TO-NOISE RATIO; SPIN; TOMOGRAPHY

Citation Formats

Brown, D. J. A., Collier Cameron, A., Enoch, B., Miller, G. R. M., Diaz, R. F., Doyle, A. P., Smalley, B., Anderson, D. R., Hellier, C., Maxted, P. F. L., Gillon, M., Lendl, M., Triaud, A. H. M. J., Queloz, D., Pollacco, D., Boisse, I., and Hebrard, G., E-mail: djab@st-andrews.ac.uk. ANALYSIS OF SPIN-ORBIT ALIGNMENT IN THE WASP-32, WASP-38, AND HAT-P-27/WASP-40 SYSTEMS. United States: N. p., 2012. Web. doi:10.1088/0004-637X/760/2/139.
Brown, D. J. A., Collier Cameron, A., Enoch, B., Miller, G. R. M., Diaz, R. F., Doyle, A. P., Smalley, B., Anderson, D. R., Hellier, C., Maxted, P. F. L., Gillon, M., Lendl, M., Triaud, A. H. M. J., Queloz, D., Pollacco, D., Boisse, I., & Hebrard, G., E-mail: djab@st-andrews.ac.uk. ANALYSIS OF SPIN-ORBIT ALIGNMENT IN THE WASP-32, WASP-38, AND HAT-P-27/WASP-40 SYSTEMS. United States. doi:10.1088/0004-637X/760/2/139.
Brown, D. J. A., Collier Cameron, A., Enoch, B., Miller, G. R. M., Diaz, R. F., Doyle, A. P., Smalley, B., Anderson, D. R., Hellier, C., Maxted, P. F. L., Gillon, M., Lendl, M., Triaud, A. H. M. J., Queloz, D., Pollacco, D., Boisse, I., and Hebrard, G., E-mail: djab@st-andrews.ac.uk. Sat . "ANALYSIS OF SPIN-ORBIT ALIGNMENT IN THE WASP-32, WASP-38, AND HAT-P-27/WASP-40 SYSTEMS". United States. doi:10.1088/0004-637X/760/2/139.
@article{osti_22086219,
title = {ANALYSIS OF SPIN-ORBIT ALIGNMENT IN THE WASP-32, WASP-38, AND HAT-P-27/WASP-40 SYSTEMS},
author = {Brown, D. J. A. and Collier Cameron, A. and Enoch, B. and Miller, G. R. M. and Diaz, R. F. and Doyle, A. P. and Smalley, B. and Anderson, D. R. and Hellier, C. and Maxted, P. F. L. and Gillon, M. and Lendl, M. and Triaud, A. H. M. J. and Queloz, D. and Pollacco, D. and Boisse, I. and Hebrard, G., E-mail: djab@st-andrews.ac.uk},
abstractNote = {We present measurements of the spin-orbit alignment angle, {lambda}, for the hot Jupiter systems WASP-32, WASP-38, and HAT-P-27/WASP-40, based on data obtained using the HARPS spectrograph. We analyze the Rossiter-McLaughlin effect for all three systems and also carry out Doppler tomography for WASP-32 and WASP-38. We find that WASP-32 (T {sub eff} = 6140{sup +90} {sub -100} K) is aligned, with an alignment angle of {lambda} = 10.{sup 0}5{sup +6.4} {sub -6.5} obtained through tomography, and that WASP-38 (T {sub eff} = 6180{sup +40} {sub -60} K) is also aligned, with tomographic analysis yielding {lambda} = 7.{sup 0}5{sup +4.7} {sub -6.1}. The latter result provides an order-of-magnitude improvement in the uncertainty in {lambda} compared to the previous analysis of Simpson et al. We are only able to loosely constrain the angle for HAT-P-27/WASP-40 (T{sub eff} = 5190{sup +160} {sub -170} K) to {lambda} = 24.{sup 0}2{sup +76.0}{sub -44.5}, owing to the poor signal-to-noise ratio of our data. We consider this result a non-detection under a slightly updated version of the alignment test of Brown et al. We place our results in the context of the full sample of spin-orbit alignment measurements, finding that they provide further support for previously established trends.},
doi = {10.1088/0004-637X/760/2/139},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 760,
place = {United States},
year = {2012},
month = {12}
}