2018ApJ...853L...8B

Query : 2018ApJ...853L...8B

2018ApJ...853L...8B - Astrophys. J., 853, L8-L8 (2018/January-3)

The first post-Kepler brightness dips of KIC 8462852.

BOYAJIAN T.S., ALONSO R., AMMERMAN A., ARMSTRONG D., ASENSIO RAMOS A., BARKAOUI K., BEATTY T.G., BENKHALDOUN Z., BENNI P., BENTLEY R.O., BERDYUGIN A., BERDYUGINA S., BERGERON S., BIERYLA A., BLAIN M.G., CAPETILLO BLANCO A., BODMAN E.H.L., BOUCHER A., BRADLEY M., BRINCAT S.M., BRINK T.G., BRIOL J., BROWN D.J.A., BUDAJ J., BURDANOV A., CALE B., CARBO M.A., CASTILLO GARCIA R., CLARK W.J., CLAYTON G.C., CLEM J.L., COKER P.H., COOK E.M., COPPERWHEAT C.M., CURTIS J.L., CUTRI R.M., CSEH B., CYNAMON C.H., DANIELS A.J., DAVENPORT J.R.A., DEEG H.J., DE LORENZO R., DE JAEGER T., DESROSIERS J.-B., DOLAN J., DOWHOS D.J., DUBOIS F., DURKEE R., DVORAK S., EASLEY L., EDWARDS N., ELLIS T.G., ERDELYI E., ERTEL S., FARFAN R.G., FARIHI J., FILIPPENKO A.V., FOXELL E., GANDOLFI D., GARCIA F., GIDDENS F., GILLON M., GONZALEZ-CARBALLO J.-L., GONZALEZ-FERNANDEZ C., GONZALEZ HERNANDEZ J.I., GRAHAM K.A., GREENE K.A., GREGORIO J., HALLAKOUN N., HANYECZ O., HARP G.R., HENRY G.W., HERRERO E., HILDBOLD C.F., HINZEL D., HOLGADO G., IGNACZ B., ILYIN I., IVANOV V.D., JEHIN E., JERMAK H.E., JOHNSTON S., KAFKA S., KALUP C., KARDASIS E., KASPI S., KENNEDY G.M., KIEFER F., KIELTY C.L., KESSLER D., KIISKINEN H., KILLESTEIN T.L., KING R.A., 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 G.P., LANE D., LAU M.W., LEWIN P., LINTOTT C., LISSE C., LOGIE L., LONGEARD N., LOPEZ VILLANUEVA M., LUDINGTON E.W., MAINZER A., MALO L., MALONEY C., MANN A., MANTERO A., MARENGO M., MARCHANT J., MARTINEZ GONZALEZ M.J., MASIERO J.R., MAUERHAN J.C., McCORMAC J., McNEELY A., MENG H.Y.A., MILLER M., MOLNAR L.A., MORALES J.C., MORRIS B.M., MUTERSPAUGH M.W., NESPRAL D., NUGENT C.R., NUGENT K.M., ODASSO A., O'KEEFFE D., OKSANEN A., O'MEARA J.M., ORDASI A., OSBORN H., OTT J.J., PARKS J.R., PEREZ D.R., PETRIEW V., PICKARD R., PAL A., PLAVCHAN P., POLLACCO D., POZO NUNEZ F., POZUELOS F.J., RAU S., REDFIELD S., RELLES H., RIBAS I., RICHARDS J., SAARIO J.L.O., SAFRON E.J., SALLAI J.M., SARNECZKY K., SCHAEFER B.E., SCHUMER C.F., SCHWARTZENDRUBER M., SIEGEL M.H., SIEMION A.P.V., SIMMONS B.D., SIMON J.D., SIMON-DIAZ S., SITKO M.L., SOCAS-NAVARRO H., SODOR A., STARKEY D., STEELE I.A., STONE G., STRASSMEIER K.G., STREET R.A., SULLIVAN T., SUOMELA J., SWIFT J.J., SZABO G.M., SZABO R., SZAKATS R., SZALAI T., TANNER A.M., TOLEDO-PADRON B., TORDAI T., TRIAUD A.H.M.J., TURNER J.D., ULOWETZ J.H., URBANIK M., VANAVERBEKE S., VANDERBURG A., VIDA K., VIETJE B.P., VINKO J., VON BRAUN K., WAAGEN E.O., WALSH D., WATSON C.A., WEIR R.C., WENZEL K., WESTENDORP PLAZA C., WILLIAMSON M.W., WRIGHT J.T., WYATT M.C., ZHENG W. and ZSIDI G.

Abstract (from CDS):

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.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): comets: general - stars: activity - stars: individual: KIC 8462852 - stars: peculiar - stars: peculiar

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 HD 190149 V* 20 01 45.2265081912 +44 07 08.564746368   8.563 6.934     M0II-III 26 0
2 TYC 3162-977-1 * 20 06 07.7412190944 +44 26 03.685638984   13.03 11.86     ~ 6 0
3 GSC 03162-00665 Er* 20 06 15.4526521026 +44 27 24.790869158   12.82 12.01 11.75   F3V 140 0
4 HD 191098 * 20 06 20.6730355200 +44 39 58.550117760   10.62 10.09     F5 6 0
5 HD 191423 * 20 08 07.1135347944 +42 36 21.962454480 7.43 8.19 8.03     ON9II-IIInn 111 0
6 V* V395 Cyg LP* 20 08 39.5639033952 +44 03 37.827471924   9.11 8.54     F8Ib 18 0
7 BD+38 4058 * 20 23 28.5314538120 +39 20 59.037427788 12.02 11.81 10.62     B0V 54 0
8 HD 204827 SB* 21 28 57.7592315784 +58 44 23.238427956 8.63 8.74 7.94 7.25 6.76 O9.5IV 355 0
9 HD 212311 * 22 21 58.5830044224 +56 31 52.717561716   8.20 8.12     A0 60 0

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