Authors

Tabetha S. Boyajian, Louisiana State UniversityFollow
Roi Alonso, Instituto de Astrofísica de Canarias
Alex Ammerman, University of Notre Dame
David Armstrong, University of Warwick
Andrés Asensio Ramos, Instituto de Astrofísica de Canarias
K. Barkaoui, Université de Liège
Thomas G. Beatty, Pennsylvania State UniversityFollow
Zouhair Benkhaldoun, Cadi Ayyad University
Paul Benni, American Association of Variable Star Observers
Rory O. Bentley, Louisiana State University at Baton Rouge
Andrei Berdyugin, University of Turku
Svetlana Berdyugina, Kiepenheuer Institut für SonnenphysikFollow
Serge Bergeron, American Association of Variable Star Observers
Allyson Bieryla, Harvard-Smithsonian Center for Astrophysics
Michaela G. Blain, Calvin College
Alicia Capetillo Blanco, American Association of Variable Star Observers
Eva H. L. Bodman, Arizona State University
Anne Boucher, Université de Montréal
Mark Bradley, American Association of Variable Star Observers
Stephen M. Brincat, American Association of Variable Star Observers
Thomas G. Brink, University of California - Berkeley
John Briol, American Association of Variable Star Observers
David J. A. Brown, University of Warwick
Jan Budaj, Slovak Academy of Sciences
Artem Burdanov, Université de Liège
Bryson Cale, George Mason University
Miguel Aznar Carbo, American Association of Variable Star Observers
R. Castillo García, American Association of Variable Star Observers
Wendy J. Clark, American Association of Variable Star Observers
Geoffrey C. Clayton, Louisiana State University at Baton Rouge
James L. Clem, Grove City College
Phillip H. Coker, American Association of Variable Star Observers
Evan M. Cook, Calvin College
Chris M. Copperwheat, Liverpool John Moores University
Jason L. Curtis, Columbia University
Roc M. Cutri, California Institute of Technology
Borbála Cseh, Konkoly Observatory
C. H. Cynamon, American Association of Variable Star Observers
Alex J. Daniels, Grove City College
James R. A. Davenport, Western Washington University
Hans J. Deeg, Instituto de Astrofísica de CanariasFollow
Roberto De Lorenzo, Alphard Observatory
Thomas de Jaeger, University of California - Berkeley
Jean-Bruno Desrosiers, American Association of Variable Star Observers
John Dolan, University of Warwick
D. J. Dowhos, American Association of Variable Star Observers
Franky Dubois, Astrolab IRIS
Russell Durkee, Shed of Science Observatory
Shawn Dvorak, American Association of Variable Star Observers
Lynn Easley, American Association of Variable Star Observers
Nick Edwards, The Thacher School
Tyler G. Ellis, Louisiana State University at Baton Rouge
Emery Erdelyi, American Association of Variable Star Observers
Steve Ertel, University of Arizona
Rafael G. Farfán, Observatorio Astronómico URANIBORG
Jay Farihi, University College London
Alexei V. Filippenko, University of California - Berkeley
Emma Foxell, University of Warwick
Davide Gandolfi, Universitá di Torino
Faustino Garcia, Valdés Observatory
Frank Giddens, Missouri State University
Michaël Gillon, Université de Liège
Juan-Luis González-Carballo, American Association of Variable Star Observers
Carlos González-Fernández, University of Cambridge
Jonay I. González Hernández, Instituto de Astrofísica de CanariaFollow
Keith A. Graham, American Association of Variable Star Observers
Kenton A. Greene, Calvin College
Joao Gregorio, Atalaia Group and CROW Observatory Portalegre
Na'ama Hallakoun, Tel Aviv University
Ottó Hanyecz, Loránd Eötvös University
Gerry R. Harp, SETI Institute
Gregory W. Henry, Tennessee State UniversityFollow
E. Herrero, Institut dÉstudis Espacials de Catalunya
Caleb F. Hildbold, Grove City College
D. Hinzel, American Association of Variable Star Observers
Gonzalo Holgado, Instituto de Astrofísica de Canarias
Bernadett Ignácz, Loránd Eötvös University
Ilya Ilyin, Leibniz-Institute for Astrophysics Potsdam
Valentin D. Ivanov, European Southern Observatory
‪Emmanuel Jehin, Université de Liège
Helen E. Jermak, Liverpool John Moores University
Steve Johnston, American Association of Variable Star Observers
Stella Kafka, American Association of Variable Star Observers
Csilla Kalup, Loránd Eötvös University
Emmanuel Kardasis, Hellenic Amateur Astronomy Association
Shai Kaspi, Tel Aviv University
Grant M. Kennedy, University of Warwick
F. Kiefer, Université Pierre & Marie CurieFollow
Collin L. Kielty, University of Victoria
Dennis Kessler, Ott Observatory
Harri Kiiskinen, Hankasalmi Observatory
Thomas L. Killestein, American Association of Variable Star Observers
Ronald A. King, American Association of Variable Star Observers
Vladimír Kollar, Slovak Academy of Sciences
Heidi Korhonen, University of CopenhagenFollow
C. Kotnik, American Association of Variable Star Observers
Réka Könyves-Tóth, Konkoly Observatory
Levente Kriskovics, Konkoly Observatory
Nathan Krumm, American Association of Variable Star Observers
Vadim Krushinsky, Ural Federal University
E. Kundra, Slovak Academy of Sciences
Francois-Rene Lachapelle, Université de Montréal
Daryll LaCourse
P. Lake, American Association of Variable Star Observers
Kristine Lam, University of Warwick
Gavin P. Lamb, Liverpool John Moores University
Dave Lane, Saint Mary's University - Canada
Marie Wingyee Lau, University of California, Santa Cruz
Pablo Lewin, American Association of Variable Star Observers
Chris Lintott, University of Oxford
Carey Lisse, Johns Hopkins University Applied Physics LaboratoryFollow
Ludwig Logie, Astrolab IRIS
Nicolas Longeard, Observatoire de Strasbourg
M. Lopez Villanueva, Alain-American Association of Variable Star Observers
E. Whit Ludington, American Association of Variable Star Observers
Amy Mainzer, California Institute of Technology
Lison Malo, Université de Montréal
Chris Maloney, American Association of Variable Star Observers
Andrew Mann, Columbia UniversityFollow
A. Mantero, American Association of Variable Star Observers
Massimo Marengo, Iowa State University
Jon Marchant, Liverpool John Moores University
María Jesús Martínez González, Instituto de Astrofísica de Canarias
Joseph R. Masiero, California Institute of Technology
Jon C. Mauerhan, University of California - Berkeley
James McCormac, University of Warwick
Aaron McNeely, University of Notre Dame
Huan Y. A. Meng, University of Arizona
Mike Miller, American Association of Variable Star Observers
Lawrence A. Molnar, Calvin College
Juan Carlos Morales, Institut de Ciències de l'Espai
Brett M. Morris, University of Washington
Matthew W. Muterspaugh, Tennessee State UniversityFollow
David Nespra, Acton Sky Portal
Carrie R. Nugent, California Institute of Technology
Katherine M. Nugent, Louisiana State University at Baton Rouge
A. Odasso, American Association of Variable Star Observers
Derek O'Keeffe, American Association of Variable Star Observers
Arto Oksanen, Hankasalmi Observatory
John M. O'Meara, Saint Michael's College
András Ordasi, Konkoly Observatory
Hugh Osborn, University of Warwick
John J. Ott, American Association of Variable Star Observers
J. R. Parks, Louisiana State University at Baton Rouge
Diego Rodriguez Perez, American Association of Variable Star Observers
Vance Petriew, American Association of Variable Star Observers
Roger Pickard, BAA Variable Star Section
András Pál, Konkoly Observatory
Peter Plavchan, George Mason University
Don Pollacco, University of Warwick
Francisco Pozo-Nuñez, University of Haifa
Francisco J. Pozuelos, Université de Liège
Steve Rau, Astrolab IRIS
Seth Redfield, Wesleyan University
Howard Relles, Harvard-Smithsonian Center for Astrophysics
Ignasi Ribas, Institut de Ciències de l'Espai
Jon Richards, SETI Institute
Joonas L. O. Saario, Koninklijke Sterrenwacht van België
Emily J. Safron, Louisiana State University at Baton Rouge
J. Martin Sallai, Konkoly Observatory
Krisztián Sárneczky, Konkoly Observatory
Bradley E. Schaefer, Louisiana State University at Baton Rouge
Clea F. Schumer, Harvard-Smithsonian Center for Astrophysics
Madison Schwartzendruber, University of Notre Dame
Michael H. Siegel, Pennsylvania State University
Andrew P. V. Siemion, University of California - Berkeley
Brooke D. Simmons, University of California - San Diego
Joshua D. Simon, Observatories of the Carnegie Institution for Science
Sergio Simón-Díaz, Instituto de Astrofísica de Canarias
Michael L. Sitko, University of Cincinnati
Hector Socas-Navarro, Instituto de Astrofísica de Canarias
Ádám Sódor, Konkoly Observatory
Donn Starkey, DeKalb Observatory
Iain A. Steele, Liverpool John Moores University
Geoff Stone, American Association of Variable Star Observers
Klaus G. Strassmeier, Leibniz-Institute for Astrophysics PotsdamFollow
Rachel A. Street, Las Cumbres ObservatoryFollow
Tricia Sullivan, Liverpool John Moores University
Jari Suomela, Clayhole Observatory
Jon J. Swift, The Thacher School
Gyula M. Szabó, ELTE Eötvös Loránd University
Róbert Szabó, Konkoly Observatory
Róbert Szakáts, Konkoly Observatory
Tamás Szalai, University of Szeged
Angelle M. Tanner, Mississippi State University
Borja Toledo-Padrón, Instituto de Astrofísica de Canarias
Tamás Tordai, Hungarian Astronomical Association
Amaury H. M. J. Triaud, University of Birmingham
Jake D. Turner, University of VirginiaFollow
Joseph H. Ulowetz, American Association of Variable Star Observers
Marian Urbanik, American Association of Variable Star Observers
Siegfried Vanaverbeke, Astrolab IRIS
Andrew Vanderburg, University of Texas at AustinFollow
Krisztián Vida, Konkoly Observatory
Brad P. Vietje, American Association of Variable Star Observers
József Vinkó, Konkoly Observatory
Kaspar von Braun, Lowell ObservatoryFollow
Elizabeth O. Waagen, American Association of Variable Star Observers
Dan Walsh, University of Notre Dame
Christopher A. Watson, Queen's University BelfastFollow
R. C. Weir, American Association of Variable Star Observers
Klaus Wenzel, Bundesdeutsche Arbeitsgemeinschaft für veränderliche Sterne
Carlos Westendorp, Plaza Instituto de Astrofísica de Canarias
Michael W. Williamson, Tennessee State UniversityFollow
Jason T. Wright, Pennsylvania State UniversityFollow
Mark C. Wyatt, University of Cambridge
WeiKang Zheng, University of California - Berkeley
Gabriella Zsidi, Konkoly Observatory

Document Type

Article

Publication Date

1-19-2018

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.

Available for download on Saturday, January 01, 2022

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