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The First Post-Kepler Brightness Dips of KIC 8462852

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العنوان: The First Post-Kepler Brightness Dips of KIC 8462852
المؤلفون: Boyajian, TS, Alonso, R, Ammerman, A, Armstrong, D, Ramos, AA, Barkaoui, K, Beatty, TG, Benkhaldoun, Z, Benni, P, Bentley, RO, Berdyugin, A, Berdyugina, S, Bergeron, S, Bieryla, A, Blain, MG, Blanco, AC, Bodman, EHL, Boucher, A, Bradley, M, Brincat, SM, Brink, TG, Briol, J, Brown, DJA, Budaj, J, Burdanov, A, Cale, B, Carbo, MA, Garcia, RC, Clark, WJ, Clayton, GC, Clem, JL, Coker, PH, Cook, EM, Copperwheat, CM, Curtis, JL, Cutri, RM, Cseh, B, Cynamon, CH, Daniels, AJ, Davenport, JRA, Deeg, HJ, De Lorenzo, R, De Jaeger, T, Desrosiers, J-B, Dolan, J, Dowhos, DJ, Dubois, F, Durkee, R, Dvorak, S, Easley, L, Edwards, N, Ellis, TG, Erdelyi, E, Ertel, S, Farfan, RG, Farihi, J, Filippenko, AV, Foxell, E, Gandolfi, D, Garcia, F, Giddens, F, Gillon, M, Gonzalez-Carballo, J-L, Gonzalez-Fernandez, C, Hernandez, JIG, Graham, KA, Greene, KA, Gregorio, J, Hallakoun, N, Hanyecz, O, Harp, GR, Henry, GW, Herrero, E, Hildbold, CF, Hinzel, D, Holgado, G, Ignacz, B, Ilyin, I, Ivanov, VD, Jehin, E, Jermak, HE, Johnston, S, Kafka, S, Kalup, C, Kardasis, E, Kaspi, S, Kennedy, GM, Kiefer, F, Kielty, CL, Kessler, D, Kiiskinen, H, Killestein, TL, King, RA, Kollar, V, Korhonen, H, Kotnik, C, Konyves-Toth, R, Kriskovics, L, Krumm, N, Krushinsky, V, Kundra, E, Lachapelle, F-R, LaCourse, D, Lake, P, Lam, K, Lamb, GP, Lane, D, Lau, MW, Lewin, P, Lintott, C, Lisse, C, Logie, L, Longeard, N, Villanueva, ML, Ludington, EW, Mainzer, A, Malo, L, Maloney, C, Mann, A, Mantero, A, Marengo, M, Marchant, J, Gonzalez, MJM, Masiero, JR, Mauerhan, JC, McCormac, J, McNeely, A, Meng, HYA, Miller, M, Molnar, LA, Morales, JC, Morris, BM, Muterspaugh, MW, Nespral, D, Nugent, CR, Nugent, KM, Odasso, A, O'Keeffe, D, Oksanen, A, O'Meara, JM, Ordasi, A, Osborn, H, Ott, JJ, Parks, JR, Perez, DR, Petriew, V, Pickard, R, Pal, A, Plavchan, P, Pollacco, D, Nunez, FP, Pozuelos, FJ, Rau, S, Redfield, S, Relles, H, Ribas, I, Richards, J, Saario, JLO, Safron, EJ, Sallai, JM, Sarneczky, K, Schaefer, BE, Schumer, CF, Schwartzendruber, M, Siegel, MH, Siemion, APV, Simmons, BD, Simon, JD, Simon-Diaz, S, Sitko, ML, Socas-Navarro, H, Sodor, A, Starkey, D, Steele, IA, Stone, G, Strassmeier, KG, Street, RA, Sullivan, T, Suomela, J, Swift, JJ, Szabo, GM, Szabo, R, Szakats, R, Szalai, T, Tanner, AM, Toledo-Padron, B, Tordai, T, Triaud, AHMJ, Turner, JD, Ulowetz, JH, Urbanik, M, Vanaverbeke, S, Vanderburg, A, Vida, K, Vietje, BP, Vinko, J, Von Braun, K, Waagen, EO, Walsh, D, Watson, CA, Weir, RC, Wenzel, K, Plaza, CW, Williamson, MW, Wright, JT, Wyatt, MC, Zheng, W, Zsidi, G
بيانات النشر: American Astronomical Society, IOP Publishing
سنة النشر: 2019
المجموعة: University of Leicester: Leicester Research Archive (LRA)
مصطلحات موضوعية: Science & Technology, Physical Sciences, Astronomy & Astrophysics, comets: general, stars: activity, stars: individual (KIC 8462852), stars: peculiar, INTERSTELLAR SILICATE MINERALOGY, TELESCOPE, STAR, PLANET, DUST, POLARIZATION, EXTINCTION, PROGRAM, MISSION, STEPS
الوصف: We present a photometric detection of the first brightness dips of the unique variable star KIC 8462852 since the end of the Kepler space mission in 2013 May. Our regular photometric surveillance started in 2015 October, and a sequence of dipping began in 2017 May continuing on through the end of 2017, when the star was no longer visible from Earth. We distinguish four main 1%–2.5% dips, named "Elsie," "Celeste," "Skara Brae," and "Angkor," which persist on timescales from several days to weeks. Our main results so far are as follows: (i) there are no apparent changes of the stellar spectrum or polarization during the dips and (ii) the multiband photometry of the dips shows differential reddening favoring non-gray extinction. Therefore, our data are inconsistent with dip models that invoke optically thick material, but rather they are in-line with predictions for an occulter consisting primarily of ordinary dust, where much of the material must be optically thin with a size scale << 1 μm, and may also be consistent with models invoking variations intrinsic to the stellar photosphere. Notably, our data do not place constraints on the color of the longer-term "secular" dimming, which may be caused by independent processes, or probe different regimes of a single process. ; The LCOGT observations used in this project were made possible by the collective effort of 1762 supporters as part of the Kickstarter campaign "The Most Mysterious Star in the Galaxy."140 The authors gratefully acknowledge and humbly extend a special thanks for substantial support from Las Cumbres Observatory, Glenn Klakring, Fred Boyajian and Bobbie Staley, Alex Mazingue, The Bible Family, Claudio Bottaccini, Joachim De Lombaert, Amity and Brigid Williams, Kevin Fischer, William Hopkins, Milton Bosch, Zipeng Wang, T.J., D.R., and C.C. The authors thank Peter Foukal for helpful conversations. A.T. wishes to acknowledge her mother, Celeste, for all her love and efforts to help her become an astronomer. A.T. also wishes to thank the ...
نوع الوثيقة: article in journal/newspaper
اللغة: English
تدمد: 2041-8205
2041-8213
Relation: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000422978900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8c4e325952a993be76947405d4bce7d5; Astrophysical Journal Letters, 2018, 853:L8 (14pp); https://iopscience.iop.org/article/10.3847/2041-8213/aaa405; http://hdl.handle.net/2381/44960
DOI: 10.3847/2041-8213/aaa405
الاتاحة: https://iopscience.iop.org/article/10.3847/2041-8213/aaa405
http://hdl.handle.net/2381/44960
https://doi.org/10.3847/2041-8213/aaa405
Rights: Copyright © 2018, American Astronomical Society, IOP Publishing. Deposited with reference to the publisher’s open access archiving policy. (http://www.rioxx.net/licenses/all-rights-reserved)
رقم الانضمام: edsbas.C552A832
قاعدة البيانات: BASE
الوصف
تدمد:20418205
20418213
DOI:10.3847/2041-8213/aaa405