Bibcode
Boyajian, T. S.; Alonso, R.; 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, H. 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 et al.
Bibliographical reference
The Astrophysical Journal Letters, Volume 853, Issue 1, article id. L8, 14 pp. (2018).
Advertised on:
1
2018
Citations
43
Refereed citations
37
Description
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.
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