Wise-allsky

The First Post-Kepler Brightness Dips of KIC 8462852

January 2018 • 2018ApJ...853L...8B

Authors • Boyajian, Tabetha. S. • Alonso, Roi • Ammerman, Alex • Armstrong, David • Asensio Ramos, A. • Barkaoui, K. • Beatty, Thomas G. • Benkhaldoun, Z. • Benni, Paul • Bentley, Rory O. • Berdyugin, Andrei • Berdyugina, Svetlana • Bergeron, Serge • Bieryla, Allyson • Blain, Michaela G. • Capetillo Blanco, Alicia • Bodman, Eva H. L. • Boucher, Anne • Bradley, Mark • Brincat, Stephen M. • Brink, Thomas G. • Briol, John • Brown, David J. A. • Budaj, J. • Burdanov, A. • Cale, B. • Aznar Carbo, Miguel • Castillo García, R. • Clark, Wendy J. • Clayton, Geoffrey C. • Clem, James L. • Coker, Phillip H. • Cook, Evan M. • Copperwheat, Chris M. • Curtis, J. L. • Cutri, R. M. • Cseh, B. • Cynamon, C. H. • Daniels, Alex J. • Davenport, James R. A. • Deeg, Hans J. • De Lorenzo, Roberto • de Jaeger, Thomas • Desrosiers, Jean-Bruno • Dolan, John • Dowhos, D. J. • Dubois, Franky • Durkee, R. • Dvorak, Shawn • Easley, Lynn • Edwards, N. • Ellis, Tyler G. • Erdelyi, Emery • Ertel, Steve • Farfán, Rafael. G. • Farihi, J. • Filippenko, Alexei V. • Foxell, Emma • Gandolfi, Davide • Garcia, Faustino • Giddens, F. • Gillon, M. • González-Carballo, Juan-Luis • González-Fernández, C. • González Hernández, J. I. • Graham, Keith A. • Greene, Kenton A. • Gregorio, J. • Hallakoun, Na'ama • Hanyecz, Ottó • Harp, G. R. • Henry, Gregory W. • Herrero, E. • Hildbold, Caleb F. • Hinzel, D. • Holgado, G. • Ignácz, Bernadett • Ilyin, Ilya • Ivanov, Valentin D. • Jehin, E. • Jermak, Helen E. • Johnston, Steve • Kafka, S. • Kalup, Csilla • Kardasis, Emmanuel • Kaspi, Shai • Kennedy, Grant M. • Kiefer, F. • Kielty, C. L. • Kessler, Dennis • Kiiskinen, H. • Killestein, T. L. • King, Ronald A. • Kollar, V. • Korhonen, H. • Kotnik, C. • Könyves-Tóth, Réka • Kriskovics, Levente • Krumm, Nathan • Krushinsky, Vadim • Kundra, E. • Lachapelle, Francois-Rene • LaCourse, D. • Lake, P. • Lam, Kristine • Lamb, Gavin P. • Lane, Dave • Lau, Marie Wingyee • Lewin, Pablo • Lintott, Chris • Lisse, Carey • Logie, Ludwig • Longeard, Nicolas • Lopez Villanueva, M. • Whit Ludington, E. • Mainzer, A. • Malo, Lison • Maloney, Chris • Mann, A. • Mantero, A. • Marengo, Massimo • Marchant, Jon • Martínez González, M. J. • Masiero, Joseph R. • Mauerhan, Jon C. • McCormac, James • McNeely, Aaron • Meng, Huan Y. A. • Miller, Mike • Molnar, Lawrence A. • Morales, J. C. • Morris, Brett M. • Muterspaugh, Matthew W. • Nespral, David • Nugent, C. R. • Nugent, Katherine M. • Odasso, A. • O'Keeffe, Derek • Oksanen, A. • O'Meara, John M. • Ordasi, András • Osborn, Hugh • Ott, John J. • Parks, J. R. • Rodriguez Perez, Diego • Petriew, Vance • Pickard, R. • Pál, András • Plavchan, P. • Pollacco, Don • Pozo Nuñez, F. • Pozuelos, F. J. • Rau, Steve • Redfield, Seth • Relles, Howard • Ribas, Ignasi • Richards, Jon • Saario, Joonas L. O. • Safron, Emily J. • Sallai, J. Martin • Sárneczky, Krisztián • Schaefer, Bradley E. • Schumer, Clea F. • Schwartzendruber, Madison • Siegel, Michael H. • Siemion, Andrew P. V. • Simmons, Brooke D. • Simon, Joshua D. • Simón-Díaz, S. • Sitko, Michael L. • Socas-Navarro, Hector • Sódor, Á. • Starkey, Donn • Steele, Iain A. • Stone, Geoff • Strassmeier, Klaus G. • Street, R. A. • Sullivan, Tricia • Suomela, J. • Swift, J. J. • Szabó, Gyula M. • Szabó, Róbert • Szakáts, Róbert • Szalai, Tamás • Tanner, Angelle M. • Toledo-Padrón, B. • Tordai, Tamás • Triaud, Amaury H. M. J. • Turner, Jake D. • Ulowetz, Joseph H. • Urbanik, Marian • Vanaverbeke, Siegfried • Vanderburg, Andrew • Vida, Krisztián • Vietje, Brad P. • Vinkó, József • von Braun, K. • Waagen, Elizabeth O. • Walsh, Dan • Watson, Christopher A. • Weir, R. C. • Wenzel, Klaus • Westendorp Plaza, C. • Williamson, Michael W. • Wright, Jason T. • Wyatt, M. C. • Zheng, WeiKang • Zsidi, Gabriella

Abstract • 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.

Links


IPAC Authors
(alphabetical)

Roc Cutri

IPAC Deputy Director


Joe_web_2020

Joe Masiero

Associate Scientist