2018A&A...619A.157M


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET19:20:51

2018A&A...619A.157M - Astronomy and Astrophysics, volume 619A, 157-157 (2018/11-1)

Constraining the period of the ringed secondary companion to the young star J1407 with photographic plates.

MENTEL R.T., KENWORTHY M.A., CAMERON D.A., SCOTT E.L., MELLON S.N., HUDEC R., BIRKBY J.L., MAMAJEK E.E., SCHRIMPF A., REICHART D.E., HAISLIP J.B., KOUPRIANOV V.V., HAMBSCH F.-J., TAN T.-G., HILLS K., GRINDLAY J.E., RODRIGUEZ J.E., LUND M.B. and KUHN R.B.

Abstract (from CDS):


Context. The 16Myr old star 1SWASP J140747.93-394542.6 (V1400 Cen) underwent a series of complex eclipses in May 2007, interpreted as the transit of a giant Hill sphere filling debris ring system around a secondary companion, J1407b. No other eclipses have since been detected, although other measurements have constrained but not uniquely determined the orbital period of J1407b. Finding another eclipse towards J1407 will help determine the orbital period of the system, the geometry of the proposed ring system and enable planning of further observations to characterize the material within these putative rings.
Aims. We carry out a search for other eclipses in photometric data of J1407 with the aim of constraining the orbital period of J1407b.
Methods. We present photometry from archival photographic plates from the Harvard DASCH survey, and Bamberg and Sonneberg Observatories, in order to place additional constraints on the orbital period of J1407b by searching for other dimming and eclipse events. Using a visual inspection of all 387 plates and a period-folding algorithm we performed a search for other eclipses in these data sets.
Results. We find no other deep eclipses in the data spanning from 1890 to 1990, nor in recent time-series photometry from 2012-2018.
Conclusions. We rule out a large fraction of putative orbital periods for J1407b from 5 to 20yr. These limits are still marginally consistent with a large Hill sphere filling ring system surrounding a brown dwarf companion in a bound elliptical orbit about J1407. Issues with the stability of any rings combined with the lack of detection of another eclipse, suggests that J1407b may not be bound to J1407.

Abstract Copyright: © ESO 2018

Journal keyword(s): planetary systems - planets and satellites: dynamical evolution and stability - planets and satellites: rings - telescopes

Simbad objects: 6

goto Full paper

goto View the reference in ADS

Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 2MASX J14073452-3949066 G 14 07 34.526 -39 49 06.60   16.02   14.81   ~ 6 0
2 ASAS J140748-3945.7 pr* 14 07 47.9296051120 -39 45 42.766332988   13.56 12.31 11.91 10.92 K5IVe 52 0
3 1SWASP J140752.03-394415.1 V* 14 07 52.0044333952 -39 44 15.172099840   13.60 12.390 12.13 11.19 ~ 3 0
4 UCAC2 14835486 * 14 07 55.211232 -39 44 27.54816           ~ 1 0
5 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 371 1
6 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1149 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2018A&A...619A.157M and select 'bookmark this link' or equivalent in the popup menu


2020.12.03-19:20:51

© Université de Strasbourg/CNRS

    • Contact