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Gaia 18dvy: A New FUor in the Cygnus OB3 Association

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.; Krezinger, M.; Kruszyńska, K.; Littlefair, S.; Maskoliūnas, M.; Mészáros, L.; Mikołajczyk, P.; Mugrauer, M.; Netzel, H.; Ordasi, A.; Pakštienė, E.; Rybicki, K.A.; Sárneczky, K.; Seli, B.; Simon, A.; Šiškauskaitė, K.; Sódor, Á; Sokolovsky, K.V.; Stenglein, W.; Street, R.; Szakáts, R.; Tomasella, L.; Tsapras, Y.; Vida, K.; Zdanavičius, J.; Zieliński, M.; Zieliński, P.; Ziółkowska, O.

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Authors

E. Szegedi-Elek

P. Ábrahám

Ł Wyrzykowski

M. Kun

Á Kóspál

L. Chen

G. Marton

A. Moór

C. Kiss

A. Pál

L. Szabados

J. Varga

E. Varga-Verebélyi

C. Andreas

E. Bachelet

R. Bischoff

A. Bódi

E. Breedt

U. Burgaz

J.M. Carrasco

V. Čepas

G. Damljanovic

I. Gezer

V. Godunova

M. Gromadzki

A. Gurgul

L. Hardy

F. Hildebrandt

S. Hoffmann

M. Hundertmark

N. Ihanec

R. Janulis

Cs Kalup

Z. Kaczmarek

R. Könyves-Tóth

M. Krezinger

K. Kruszyńska

S. Littlefair

M. Maskoliūnas

L. Mészáros

P. Mikołajczyk

M. Mugrauer

H. Netzel

A. Ordasi

E. Pakštienė

K.A. Rybicki

K. Sárneczky

B. Seli

A. Simon

K. Šiškauskaitė

Á Sódor

K.V. Sokolovsky

W. Stenglein

R. Street

R. Szakáts

L. Tomasella

Y. Tsapras

K. Vida

J. Zdanavičius

M. Zieliński

P. Zieliński

O. Ziółkowska



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 gsim4 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.

Citation

Szegedi-Elek, E., Ábrahám, P., Wyrzykowski, Ł., Kun, M., Kóspál, Á., Chen, L., …Ziółkowska, O. (2020). Gaia 18dvy: A New FUor in the Cygnus OB3 Association. Astrophysical Journal, 899(2), Article 130. https://doi.org/10.3847/1538-4357/aba129

Journal Article Type Article
Acceptance Date May 22, 2020
Online Publication Date Aug 20, 2020
Publication Date 2020-08
Deposit Date Sep 9, 2020
Publicly Available Date Mar 29, 2024
Journal Astrophysical Journal
Print ISSN 0004-637X
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 899
Issue 2
Article Number 130
DOI https://doi.org/10.3847/1538-4357/aba129

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Copyright Statement
© 2020. The American Astronomical Society. All rights reserved.





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