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

Autor(es):Mostrar menos -

Osborn, H. P. ^[1] ; Kenworthy, M. ^[2] ; Rodriguez, J. E. ^[3] ; de Mooij, E. J. W. ^[4] ; Kennedy, G. M. ^{[5, 6]} ; Relles, H. ^[7] ; Gomez, E. ^[7] ; Hippke, M. ^[8] ; Banfi, M. ; Barbieri, L. ; Becker, I. S. ^[9] ; Benni, P. ^[10] ; Berlind, P. ^[3] ; Bieryla, A. ^[3] ; Bonnoli, G. ^[11] ; Boussier, H. ; Brincat, S. M. ; Briol, J. ; Burleigh, M. R. ^[12] ; Butterley, T. ^[13] ; Calkins, M. L. ^[3] ; Chote, P. ^[6] ; Ciceri, S. ^[14] ; Deldem, M. ; Dhillon, V. S. ^{[15, 16]} ; Dose, E. ; Dubois, F. ^[17] ; Dvorak, S. ; Esquerdo, G. A. ^[3] ; Evans, D. F. ^[18] ; Ferratfiat, S. ; Fossey, S. J. ^{[19, 20]} ; Gunther, M. N. ^[21] ; Hall, J. ; Hambsch, F. -J. ^[22] ; Herrero, E. ^[23] ; Hills, K. ; James, R. ; Jayawardhana, R. ^[24] ; Kafka, S. ^[25] ; Killestein, T. L. ^[4] ; Kotnik, C. ; Latham, D. W. ^[3] ; Lemay, D. ; Lewin, P. ; Littlefair, S. ^[16] ; Lopresti, C. ; Mallonn, M. ^[26] ; Mancini, L. ^{[27, 28, 29]} ; Marchini, A. ; McCormac, J. J. ^{[5, 6]} ; Murawski, G. ^[30] ; Myers, G. ^[25] ; Papini, R. ; Popov, V. ^[31] ; Quadri, U. ; Quinn, S. N. ^[3] ; Raynard, L. ^[12] ; Rizzuti, L. ; Robertson, J. ^[32] ; Salvaggio, F. ; Scholz, A. ^[33] ; Sfair, R. ^[9] ; Smith, A. M. S. ^[34] ; Southworth, J. ^[18] ; Tan, T. G. ^[35] ; Vanaverbeke, S. ^[17] ; Waagen, E. O. ^[23] ; Watson, C. A. ^[36] ; West, R. G. ^{[5, 6]} ; Winter, O. C. ^[9] ; Wheatley, P. J. ^{[5, 6]} ; Wilson, R. W. ^[13] ; Zhou, G. ^[3]

Afiliação do(s) autor(es):Mostrar menos -

^[1] Aix Marseille Univ, CNRS, UMR 7326, LAM, F-13388 Marseille - France

^[2] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden - Netherlands

^[3] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 - USA

^[4] Univ Warsaw, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands - England

^[5] Las Cumbres Observ, 6740 Cortona Dr, Suite 102, Goleta, CA 93117 - USA

^[6] Univ Warsaw, Ctr Exoplanets & Habitabil, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands - England

^[7] Dublin City Univ, Ctr Astrophys & Relat, Sch Phys Sci, Dublin 9 - Ireland

^[8] Sonneberg Observ, Sternwarte Str 32, D-96515 Sonneberg - Germany

^[9] UNESP Sa Paulo State Univ, Grp Dinam Orbital & Planetol, BR-12516410 Guaratingueta, SP - Brazil

^[10] Acton Sky Portal Private Observ, Acton, MA - USA

^[11] Univ Siena, Dipartimento Sci Fis Terra & Ambiente, Astron Observ, I-53100 Siena - Italy

^[12] Univ Leicester, Leicester Inst Space & Earth Observat, Dept Phys & Astron, Leicester LE1 7RH, Leics - England

^[13] Univ Durham, Dept Phys, Ctr Adv Instrumentat, South Rd, Durham DH1 3LE - England

^[14] Stockholm Univ, Alba Nova Univ Ctr, Dept Astron, SE-10691 Stockholm - Sweden

^[15] Inst Astrofis Canarias, E-38205 Tenerife - Spain

^[16] Univ Sheffield, Dept Phys, Astron, Sheffield S3 7RH, S Yorkshire - England

^[17] astroLAB IRIS, Verbrandemolenstr 5, B-8902 Zillebeke - Belgium

^[18] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs - England

^[19] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT - England

^[20] UCL Observ UCLO, 553 Watford Way, Mill Hill, London NW7 2QS - England

^[21] Cavendish Lab, Astrophys Grp, JJ Thomson Ave, Cambridge CB3 0HE - England

^[22] VVS, BE-8000 Brugge - Belgium

^[23] IEEC, Montsec Astron Observ OAdM, Barcelona 08034 - Spain

^[24] York Univ, Phys, Astron, Toronto, ON L3T 3R1 - Canada

^[25] Amer Assoc Variable Star Observers, 49 Bay State Rd, Cambridge, MA 02138 - USA

^[26] Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam - Germany

^[27] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg - Germany

^[28] Univ Roma Tor Vergata, Dept Phys, Via Ric Sci 1, I-00133 Rome - Italy

^[29] INAF Astrophys Observ Turin, Via Osservatorio 20, I-10025 Pino Torinese - Italy

^[30] Med Univ Bialystok, Fac Med, PL-15089 Bialystok - Poland

^[31] Shumen Univ, Dept Phys & Astron, Shumen 9700 - Bulgaria

^[32] Arkansas Tech Univ, 1701 N Boulder Ave, Russellville, AR 72801 - USA

^[33] SUPA, Sch Phys, Astron, St Andrews KY16 9SS, Fife - Scotland

^[34] German Aerosp Ctr, Inst Planetary Res, Rutherfordstr 2, D-12489 Berlin - Germany

^[35] PEST, Perth, WA - Australia

^[36] Queens Univ Belfast, Astrophys Res Ctr, Belfast BT7 1NN, Antrim - North Ireland

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 485, n. 2, p. 1614-1625, MAY 2019.
• Citações Web of Science: 1

Resumo

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. Asearch 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. (AU)

• Processo FAPESP: 16/24561-0 - A relevância dos pequenos corpos em dinâmica orbital
• Beneficiário: Othon Cabo Winter
• Modalidade de apoio: Auxílio à Pesquisa - Temático