2019MNRAS.485.1614O

Query : 2019MNRAS.485.1614O

2019MNRAS.485.1614O - Mon. Not. R. Astron. Soc., 485, 1614-1625 (2019/May-2)

The PDS 110 observing campaign - photometric and spectroscopic observations reveal eclipses are aperiodic.

OSBORN H.P., KENWORTHY M., RODRIGUEZ J.E., DE MOOIJ E.J.W., KENNEDY G.M., RELLES H., GOMEZ E., HIPPKE M., BANFI M., BARBIERI L., BECKER I.S., BENNI P., BERLIND P., BIERYLA A., BONNOLI G., BOUSSIER H., BRINCAT S.M., BRIOL J., BURLEIGH M.R., BUTTERLEY T., CALKINS M.L., CHOTE P., CICERI S., DELDEM M., DHILLON V.S., DOSE E., DUBOIS F., DVORAK S., ESQUERDO G.A., EVANS D.F., FERRATFIAT S., FOSSEY S.J., GUNTHER M.N., HALL J., HAMBSCH F.-J., HERRERO E., HILLS K., JAMES R., JAYAWARDHANA R., KAFKA S., KILLESTEIN T.L., KOTNIK C., LATHAM D.W., LEMAY D., LEWIN P., LITTLEFAIR S., LOPRESTI C., MALLONN M., MANCINI L., MARCHINI A., McCORMAC J.J., MURAWSKI G., MYERS G., PAPINI R., POPOV V., QUADRI U., QUINN S.N., RAYNARD L., RIZZUTI L., ROBERTSON J., SALVAGGIO F., SCHOLZ A., SFAIR R., SMITH A.M.S., SOUTHWORTH J., TAN T.G., VANAVERBEKE S., WAAGEN E.O., WATSON C.A., WEST R.G., WINTER O.C., WHEATLEY P.J., WILSON R.W. and ZHOU G.

Abstract (from CDS):

PDS 110 is a young disc-hosting star in the Orion OB1A association. Two dimming events of similar depth and duration were seen in 2008 (WASP) and 2011 (KELT), consistent with an object in a closed periodic orbit. In this paper, we present data from a ground-based observing campaign designed to measure the star both photometrically and spectroscopically during the time of predicted eclipse in 2017 September. Despite high-quality photometry, the predicted eclipse did not occur, although coherent structure is present suggesting variable amounts of stellar flux or dust obscuration. We also searched for radial velocity (RV) oscillations caused by any hypothetical companion and can rule out close binaries to 0.1Ms. A search of Sonneberg plate archive data also enabled us to extend the photometric baseline of this star back more than 50 yr, and similarly does not re-detect any deep eclipses. Taken together, they suggest that the eclipses seen in WASP and KELT photometry were due to aperiodic events. It would seem that PDS 110 undergoes stochastic dimmings that are shallower and of shorter duration than those of UX Ori variables, but may have a similar mechanism.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

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

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* RZ Psc Ae* 01 09 42.0521542224 +27 57 01.910757240   12.20 11.29     G8V 79 0
2 V* V409 Tau Or* 04 18 10.7829040872 +25 19 57.380624580   15.00 13.34 12.88   M0e 76 0
3 V* AA Tau Or* 04 34 55.4201902392 +24 28 53.033624580 13.14 13.34 12.20 12.03   K5Ve 801 0
4 HD 290380 Or* 05 23 31.0101754824 -01 04 23.701574136   10.97 10.41 10.25 9.79 keF6IVeb 53 0
5 NAME Ori I As* 05 38 -02.8           ~ 653 0
6 V* V1247 Ori dS* 05 38 05.2519466880 -01 15 21.698856468   10.18 9.82     F0V 136 0
7 ASAS J140748-3945.7 Y*O 14 07 47.9297625720 -39 45 42.767059968   13.56 12.31 11.91 10.92 K5IVe 84 0
8 [PBB2002] USco J160207.5-225746 Or* 16 02 07.5766784976 -22 57 46.882812240           M1e 59 0
9 GSC 03162-00665 Er* 20 06 15.4526521026 +44 27 24.790869158   12.82 12.01 11.75   F3V 159 0
10 Ass Ori OB 1a As* ~ ~           ~ 237 0

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