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:1410.6577)
· On-line Data
· References in the article
· Citations to the Article (19) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (16)
· Associated Articles
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Mass and period limits on the ringed companion transiting the young star J1407
Authors:
Kenworthy, M. A.; Lacour, S.; Kraus, A.; Triaud, A. H. M. J.; Mamajek, E. E.; Scott, E. L.; Ségransan, D.; Ireland, M.; Hambsch, F.-J.; Reichart, D. E.; Haislip, J. B.; LaCluyze, A. P.; Moore, J. P.; Frank, N. R.
Affiliation:
AA(Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands; ), AB(LESIA, CNRS/UMR-8109, Observatoire de Paris, UPMC, Université Paris Diderot, 5 place Jules Janssen, F-92195 Meudon, France), AC(Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA), AD(Kavli Institute for Astrophysics & Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes, 51, CH-1290 Sauverny, Switzerland), AE(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627-0171, USA), AF(Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627-0171, USA), AG(Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes, 51, CH-1290 Sauverny, Switzerland), AH(Research School of Astronomy and Astrophysics, Mt Stromlo Observatory, Cotter Rd, Weston, ACT 2611, Australia), AI(Center for Backyard Astrophysics (Antwerp), American Association of Variable Star Observers (AAVSO), Vereniging Voor Sterrenkunde (VVS), Andromeda Observatory, Oude Bleken 12, B-2400 Mol, Belgium), AJ(Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Campus Box 3255, Chapel Hill, NC 27599, USA), AK(Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Campus Box 3255, Chapel Hill, NC 27599, USA), AL(Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Campus Box 3255, Chapel Hill, NC 27599, USA), AM(Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Campus Box 3255, Chapel Hill, NC 27599, USA), AN(Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Campus Box 3255, Chapel Hill, NC 27599, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 446, Issue 1, p.411-427 (MNRAS Homepage)
Publication Date:
01/2015
Origin:
OUP
Astronomy Keywords:
planets and satellites: formation, planets and satellites: rings, binaries: eclipsing, stars: individual: 1SWASP J140747.93-394542.6 (ASAS J140748-3945.7), planetary systems
Abstract Copyright:
2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
DOI:
10.1093/mnras/stu2067
Bibliographic Code:
2015MNRAS.446..411K

Abstract

The young (˜16 Myr) pre-main-sequence star in Sco-Cen 1SWASP J140747.93-394542.6, hereafter referred to as J1407, underwent a deep eclipse in 2007 April, bracketed by several shallower eclipses in the surrounding 54 d. This has been interpreted as the first detection of an eclipsing ring system circling a substellar object (dubbed J1407b). We report on a search for this companion with Sparse Aperture Mask imaging and direct imaging with both the UT4 VLT and Keck telescopes. Radial velocity measurements of J1407 provide additional constraints on J1407b and on short period companions to the central star. Follow-up photometric monitoring using the Panchromatic Robotic Optical Monitoring and Polarimetry Telescopes (PROMPT)-4 and ROAD observatories during 2012-2014 has not yielded any additional eclipses. Large regions of mass-period space are ruled out for the companion. For circular orbits the companion period is constrained to the range 3.5-13.8 yr (a ~= 2.2-5.6 au), and stellar masses (>80MJup) are ruled out at 3sigma significance over these periods. The complex ring system appears to occupy more than 0.15 of its Hill radius, much larger than its Roche radius and suggesting a ring structure in transition. Further, we demonstrate that the radial velocity of J1407 is consistent with membership in the Upper Cen-Lup subgroup of the Sco-Cen association, and constraints on the rotation period and projected rotational velocity of J1407 are consistent with a stellar inclination of i* ~= 68° ± 10°.

Associated Articles

Source Paper     Catalog Description    


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