2017MNRAS.471..740O

Query : 2017MNRAS.471..740O

2017MNRAS.471..740O - Mon. Not. R. Astron. Soc., 471, 740-749 (2017/October-2)

Periodic eclipses of the young star PDS 110 discovered with WASP and KELT photometry.

OSBORN H.P., RODRIGUEZ J.E., KENWORTHY M.A., KENNEDY G.M., MAMAJEK E.E., ROBINSON C.E., ESPAILLAT C.C., ARMSTRONG D.J., SHAPPEE B.J., BIERYLA A., LATHAM D.W., ANDERSON D.R., BEATTY T.G., BERLIND P., CALKINS M.L., ESQUERDO G.A., GAUDI B.S., HELLIER C., HOLOIEN T.W.-S., JAMES D., KOCHANEK C.S., KUHN R.B., LUND M.B., PEPPER J., POLLACCO D.L., PRIETO J.L., SIVERD R.J., STASSUN K.G., STEVENS D.J., STANEK K.Z. and WEST R.G.

Abstract (from CDS):

We report the discovery of eclipses by circumstellar disc material associated with the young star PDS 110 in the Ori OB1a association using the SuperWASP and Kilodegree Extremely Little Telescope surveys. PDS 110 (HD 290380, IRAS 05209-0107) is a rare Fe/Ge-type star, an ∼10 Myr-old accreting intermediate-mass star showing strong infrared excess (LIR/Lbol ≃ 0.25). Two extremely similar eclipses with a depth of 30 per cent and duration ∼25 d were observed in 2008 November and 2011 January. We interpret the eclipses as caused by the same structure with an orbital period of 808 ± 2 d. Shearing over a single orbit rules out diffuse dust clumps as the cause, favouring the hypothesis of a companion at ∼2 au. The characteristics of the eclipses are consistent with transits by an unseen low-mass (1.8-70 MJup) planet or brown dwarf with a circumsecondary disc of diameter ∼0.3 au. The next eclipse event is predicted to take place in 2017 September and could be monitored by amateur and professional observatories across the world.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): protoplanetary discs - circumstellar matter - stars: individual: PDS 110 - stars: pre-main-sequence - stars: variables: T Tauri, Herbig Ae/Be - stars: variables: T Tauri, Herbig Ae/Be

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* V409 Tau Or* 04 18 10.7829040872 +25 19 57.380624580   15.00 13.34 12.88   M0e 64 0
2 * eps Aur EB* 05 01 58.1343686760 +43 49 23.917115316 3.86 3.53 2.99 2.47 2.02 A9Ia 581 0
3 PDS 110b Pl? 05 23 31.0101754824 -01 04 23.701574136           ~ 2 0
4 HD 290380 EB* 05 23 31.0101754824 -01 04 23.701574136   10.97 10.41 10.25 9.79 keF6IVeb 41 0
5 NAME Ori I As* 05 38 -02.8           ~ 615 0
6 V* DM Ori Or* 05 43 39.0072077256 -05 04 02.863206408   12.50 11.54 13.50   G 23 2
7 V* V582 Mon TT* 06 41 10.3403165544 +09 28 33.487425336   17.404   17.21 16.45 K5e 192 0
8 TYC 2505-672-1 EB* 09 53 10.0011302112 +33 53 52.756520568   12.51 10.71     ~ 21 0
9 [KLK2015] J1407b Pl? 14 07 47.9297625720 -39 45 42.767059968           ~ 10 0
10 ASAS J140748-3945.7 Y*O 14 07 47.9297625720 -39 45 42.767059968   13.56 12.31 11.91 10.92 K5IVe 67 0
11 BD+55 2693 Be* 22 09 22.7543431920 +55 45 24.256674360 10.88 11.1 10.9     B5:nev 81 0
12 Ass Ori OB 1a As* ~ ~           ~ 230 0

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