Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0907.5205)
· References in the article
· Citations to the Article (11) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (9)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The Transit Ingress and the Tilted Orbit of the Extraordinarily Eccentric Exoplanet HD 80606b
Authors:
Winn, Joshua N.; Howard, Andrew W.; Johnson, John Asher; Marcy, Geoffrey W.; Gazak, J. Zachary; Starkey, Donn; Ford, Eric B.; Colón, Knicole D.; Reyes, Francisco; Nortmann, Lisa; Dreizler, Stefan; Odewahn, Stephen; Welsh, William F.; Kadakia, Shimonee; Vanderbei, Robert J.; Adams, Elisabeth R.; Lockhart, Matthew; Crossfield, Ian J.; Valenti, Jeff A.; Dantowitz, Ronald; Carter, Joshua A.
Affiliation:
AA(Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA ), AB(Department of Astronomy, University of California, Mail Code 3411, Berkeley, CA 94720, USA ; Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA ; Townes Postdoctoral Fellow. ), AC(Institute for Astronomy, University of Hawaii, Honolulu, HI 96822, USA ; NSF Astronomy and Astrophysics Postdoctoral Fellow.), AD(Department of Astronomy, University of California, Mail Code 3411, Berkeley, CA 94720, USA ), AE(Institute for Astronomy, University of Hawaii, Honolulu, HI 96822, USA ), AF(DeKalb Observatory H63, Auburn, IN 46706, USA ), AG(Department of Astronomy, University of Florida, 211 Bryant Space Center, P.O. Box 112055, Gainesville, FL 32611, USA ), AH(Department of Astronomy, University of Florida, 211 Bryant Space Center, P.O. Box 112055, Gainesville, FL 32611, USA ), AI(Department of Astronomy, University of Florida, 211 Bryant Space Center, P.O. Box 112055, Gainesville, FL 32611, USA ), AJ(Institute for Astrophysics, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany ), AK(Institute for Astrophysics, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany ), AL(McDonald Observatory, University of Texas, Austin, TX 78712, USA ), AM(Department of Astronomy, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA ), AN(Department of Astronomy, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA ), AO(Department of Operations Research and Financial Engineering, Princeton University, Princeton, NJ 08544, USA ), AP(Department of Earth, Atmospheric, and Planetary Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA ), AQ(Department of Earth, Atmospheric, and Planetary Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA ), AR(Department of Astronomy, University of California, 430 Portola Plaza, Box 951547, Los Angeles, CA 90095, USA ), AS(Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, USA ), AT(Clay Center Observatory, Dexter and Southfield Schools, 20 Newton St., Brookline, MA 02445, USA ), AU(Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA )
Publication:
The Astrophysical Journal, Volume 703, Issue 2, pp. 2091-2100 (2009). (ApJ Homepage)
Publication Date:
10/2009
Origin:
IOP
ApJ Keywords:
planetary systems, planetary systems: formation, stars: individual: HD 80606, stars: rotation
DOI:
10.1088/0004-637X/703/2/2091
Bibliographic Code:
2009ApJ...703.2091W

Abstract

We present the results of a transcontinental campaign to observe the 2009 June 5 transit of the exoplanet HD 80606b. We report the first detection of the transit ingress, revealing the transit duration to be 11.64 ± 0.25 hr and allowing more robust determinations of the system parameters. Keck spectra obtained at midtransit exhibit an anomalous blueshift, giving definitive evidence that the stellar spin axis and planetary orbital axis are misaligned. The Keck data show that the projected spin-orbit angle λ is between 32° and 87° with 68.3% confidence and between 14° and 142° with 99.73% confidence. Thus, the orbit of this planet is not only highly eccentric (e = 0.93) but is also tilted away from the equatorial plane of its parent star. A large tilt had been predicted, based on the idea that the planet's eccentric orbit was caused by the Kozai mechanism. Independently of the theory, it is worth noting that all three exoplanetary systems with known spin-orbit misalignments have massive planets on eccentric orbits, suggesting that those systems migrate through a different channel than lower mass planets on circular orbits.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints