Gaia 18dvy: A New FUor in the Cygnus OB3 Association
Journal
Date Issued
2020
Author(s)
Szegedi-Elek, E.
•
Ábrahám, P.
•
Wyrzykowski, Ł.
•
Kun, M.
•
Kóspál, Á.
•
Chen, L.
•
Marton, G.
•
Moór, A.
•
Kiss, C.
•
Pál, A.
•
Szabados, L.
•
Varga, J.
•
Varga-Verebélyi, E.
•
Andreas, C.
•
Bachelet, E.
•
Bischoff, R.
•
Bódi, A.
•
Breedt, E.
•
Burgaz, U.
•
Butterley, T.
•
Carrasco, J. M.
•
Čepas, V.
•
Damljanovic, G.
•
Gezer, I.
•
Godunova, V.
•
Gromadzki, M.
•
Gurgul, A.
•
Hardy, L.
•
Hildebrandt, F.
•
Hoffmann, S.
•
Hundertmark, M.
•
Ihanec, N.
•
Janulis, R.
•
Kalup, Cs.
•
Kaczmarek, Z.
•
Könyves-Tóth, R.
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Krezinger, M.
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Kruszyńska, K.
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Littlefair, S.
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Maskoliūnas, M.
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Mészáros, L.
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Mikołajczyk, P.
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Mugrauer, M.
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Netzel, H.
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Ordasi, A.
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Pakštienė, E.
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Rybicki, K. A.
•
Sárneczky, K.
•
Seli, B.
•
Simon, A.
•
Šiškauskaitė, K.
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Sódor, Á.
•
Sokolovsky, K. V.
•
Stenglein, W.
•
Street, R.
•
Szakáts, R.
•
•
Tsapras, Y.
•
Vida, K.
•
Zdanavičius, J.
•
Zieliński, M.
•
Zieliński, P.
•
Ziółkowska, O.
Abstract
We present optical-infrared photometric and spectroscopic observations of Gaia 18dvy, located in the Cygnus OB3 association at a distance of 1.88 kpc. Gaia 18dvy was noted by the Gaia alerts system when its light curve exhibited a ≳4 mag rise in 2018-2019. The brightening was also observable at mid-infared wavelengths. The infrared colors of Gaia 18dvy became bluer as the outburst progressed. Its optical and near-infrared spectroscopic characteristics in the outburst phase are consistent with those of bona fide FU Orionis-type young eruptive stars. The progenitor of the outburst is probably a low-mass K-type star with an optical extinction of ˜3 mag. A radiative transfer modeling of the circumstellar structure, based on the quiescent spectral energy distribution, indicates a disk with a mass of 4 × 10-3 M⊙. Our simple accretion disk modeling implies that the accretion rate had been exponentially increasing for more than 3 yr until mid-2019, when it reached a peak value of 6.9 × 10-6 M⊙ yr-1. In many respects, Gaia 18dvy is similar to the FU Ori-type object HBC 722.
Volume
899
Issue
2
Start page
130
Issn Identifier
0004-637X
Ads BibCode
2020ApJ...899..130S
Rights
open.access
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