42 citations · 273 across the 17 of their papers we have counts for
17 papers
The Enigma of Gaia18cjb: a Rare Hybrid of FUor and EXor?
Eleonora Fiorellino, Peter Abraham, Agnes Kospal +28
Context. Gaia18cjb is one of the Gaia-alerted eruptive young star candidates which has been experiencing a slow and strong brightening during the last 13 years, similar to some FU…
Gaia21bty: An EXor lightcurve exhibiting an FUor spectrum
Michał Siwak, Lynne A. Hillenbrand, Ágnes Kóspál +16
Gaia21bty, a pre-main sequence star that previously had shown aperiodic dips in its light curve, underwent a considerable mag brightening that occurred over a few mo…
The Gaia alerted fading of the FUor-type star Gaia21elv
Zsófia Nagy, Sunkyung Park, Péter Ábrahám +26
FU Orionis objects (FUors) are eruptive young stars, which exhibit outbursts that last from decades to a century. Due to the duration of their outbursts, and to the fact that only…
Photometric and spectroscopic study of the EXor-like eruptive young star Gaia19fct
Sunkyung Park, Ágnes Kóspál, Péter Ábrahám +19
Gaia19fct is one of the Gaia-alerted eruptive young stars that has undergone several brightening events. We conducted monitoring observations using multi-filter optical and near-in…
Photometric and spectroscopic study of the burst-like brightening of two Gaia-alerted young stellar objects
Zsófia Nagy, Péter Ábrahám, Ágnes Kóspál +18
Young stars show variability on different time-scales from hours to decades, with a range of amplitudes. We studied two young stars, which triggered the Gaia Science Alerts system…
Recurrent strong outbursts of an EXor-like young eruptive star Gaia20eae
Fernando Cruz-Sáenz de Miera, Ágnes Kóspál, Péter Ábrahám +21
We present follow-up photometric and spectroscopic observations, and subsequent analysis of Gaia20eae. This source triggered photometric alerts during 2020 after showing a 3…
V899 Mon: a peculiar eruptive young star close to the end of its outburst
Sunkyung Park, Ágnes Kóspál, Fernando Cruz-Sáenz de Miera +15
V899 Mon is an eruptive young star showing characteristics of both FUors and EXors. It reached a peak brightness in 2010, then briefly faded in 2011, followed by a second outburst.…
Evidence of Accretion Burst: The Viscously Heated Inner Disk of the Embedded Protostar IRAS 16316-1540
Sung-Yong Yoon, Jeong-Eun Lee, Seokho Lee +5
Outbursts of young stellar objects occur when the mass accretion rate suddenly increases. However, such outbursts are difficult to detect for deeply embedded protostars due to thei…
A kinematic perspective on the formation process of the stellar groups in the Rosette Nebula
Beomdu Lim, Yael Naze, Jongsuk Hong +6
Stellar kinematics is a powerful tool for understanding the formation process of stellar associations. Here, we present a kinematic study of the young stellar population in the Ros…
High-resolution spectroscopic monitoring observations of FU Orionis-type object, V960 Mon
Sunkyung Park, Jeong-Eun Lee, Tae-Soo Pyo +9
We present the results of high-resolution (R 30,000) optical and near-infrared spectroscopic monitoring observations of a FU Orionis-type object, V960 Mon, which underwent an…
The origin of a distributed stellar population in the star-forming region W4
Beomdu Lim, Jongsuk Hong, Hyeong-Sik Yun +5
Stellar kinematics provides the key to understanding the formation process and dynamical evolution of stellar systems. Here, we present a kinematic study of the massive star-formin…
IGRINS Spectral Library
Sunkyung Park, Jeong-Eun Lee, Wonseok Kang +12
We present a library of high-resolution (R / 45,000) and high signal-to-noise ratio (S/N 200) near-infrared spectra for stars of a wide range of spe…
Kinematic evidence for feedback-driven star formation in NGC 1893
Beomdu Lim, Hwankyung Sung, Michael S. Bessell +8
OB associations are the prevailing star forming sites in the Galaxy. Up to now, the process of how OB associations were formed remained a mystery. A possible process is self-regula…
IGRINS spectroscopy of Class I sources: IRAS 03445+3242 and IRAS 04239+2436
Seokho Lee, Jeong-Eun Lee, Sunkyung Park +4
We have detected molecular and atomic line emission from the hot and warm disks of two Class I sources, IRAS 03445+3242 and IRAS 04239+2436 using the high resolution Immersion GRat…
Direct Spectral Detection: An Efficient Method to Detect and Characterize Binary Systems
Kevin Gullikson, Adam Kraus, Sarah Dodson-Robinson +6
Young, intermediate-mass stars are experiencing renewed interest as targets for direct-imaging planet searches. However, these types of stars are part of multiple systems more ofte…
High Resolution Optical and NIR Spectra of HBC 722
Jeong-Eun Lee, Sunkyung Park, Joel D. Green +4
We present the results of high resolution (R30,000) optical and near-IR spectroscopic monitoring observations of HBC 722, a recent FU Orionis object that underwent an accretio…
Wilson-Bappu Effect: Extended to Surface Gravity
Sunkyung Park, Wonseok Kang, Jeong-Eun Lee +1
Wilson and Bappu found a tight correlation between the stellar absolute visual magnitude (Mv) and the width of the Ca II K emission line for late-type stars in 1957. Here, we revis…