293 citations · 1.5k across the 41 of their papers we have counts for
42 papers
Hot water emission during an outburst in a classical T Tauri star
Zhen Guo, Javier Osses, Vitor Fermiano +34
In this paper, we present observations of an eruptive young star in the Rosette Nebula, identified by the Gaia Science Alerts system using Gaia time series data. We aim to investig…
A Parameterized YSO Accretion Disk Model with Increasing Accretion Rate: Predicted Outburst Lightcurves
Gautam Das, Lynne A. Hillenbrand, Adolfo S. Carvalho
A sub-class among Young Stellar Objects (YSOs), known as FU Ori type stars, undergo sudden rises in luminosity by several orders of magnitude on timescales of a few months to a few…
Quantitative Spectroscopic Diagnostics for FU Orionis-Type Young Stellar Objects
Evan R. Portnoi, Lynne A. Hillenbrand, Adolfo S. Carvalho
We present near-infrared spectroscopic diagnostics that can be used to identify FU Orionis stars (FUOrs). FUOrs are young stellar objects (YSOs) that are currently in a state of ex…
The FUor Mass Distribution Matches the Solar Neighborhood IMF: Evidence for a Universal Eruptive Phase
Adolfo S. Carvalho, Lynne A. Hillenbrand
Eruptive accretion events are expected to play an important role in the mass buildup stage of individual star formation. FU Ori objects (FUors) experience the most extreme eruptive…
SPHEREx as a frontier for infrared transients: Classification of new Galactic FU Ori outbursts and classical novae
Viraj Karambelkar, Kishalay De, Lynne A. Hillenbrand +3
We demonstrate proof-of-concept of a new strategy for studying infrared (IR) transients enabled by the newly launched SPHEREx space mission, by leveraging its synergy with the NEOW…
A New FU Orionis Accretion Outburst in the W5 HII Region
Lynne A. Hillenbrand, Matthew J. Graham, Mansi M. Kasliwal +9
We announce a recently detected outburst that is currently only a few months old, and probably of FU Orionis type. The progenitor to the outburst was an emission-line, flat-spectru…
The Near-Ultraviolet Spectra of FU Orionis Accretion Disks
Adolfo S. Carvalho, Lynne A. Hillenbrand, Gregory J. Herczeg +1
We present the results of the first high-sensitivity NUV (1800 to 3200 Å) survey of FU Ori objects, using the \textit{Hubble Space Telescope} (HST) STIS spectrograph. We compare ne…
Seeking Kinematic Association of Known FU Orionis Stars with Young Clusters in Cygnus
Tamojeet Roychowdhury, Lynne A. Hillenbrand
Kinematic studies of young stars and star clusters have increased our understanding of the process of star formation and evolution in the Milky Way. FU Orionis objects are a specif…
The Outbursting YSOs Catalogue (OYCAT)
C. Contreras Peña, J. -E. Lee, G. Herczeg +39
YSOs can display unpredictable and high-amplitude rises in brightness that can last from a few months to possibly over 100 years. These types of outbursts are explained by large ch…
Multi-color characterization of optically invisible FU Orionis-type outbursts: Demonstration and prospects for the WINTER survey
Danielle Frostig, Kishalay De, Lynne A. Hillenbrand +8
Episodic mass accretion is the dominant mechanism for mass assembly in the proto-stellar phase. Although prior optical time-domain searches have allowed detailed studies of individ…
The Hot Inner AU of V883 Ori
Adolfo S. Carvalho, Lynne A. Hillenbrand, Ágnes Kóspál
The V883 Ori system is a rapidly accreting young stellar object that has been used as a laboratory for studying the molecular inventory of young circumstellar disks with high lumin…
Continued Photometric Monitoring Supports Long-Term Dynamical Evolution in the Young Binary Star-Disk System KH 15D
Luke Lamitina, Lynne Hillenbrand, Michael Poon
We present photometric time series data spanning 2018-2024 that show the effects of temporal dynamics in the binary system KH 15D, a member of the NGC 2264 star forming region. Thi…
FUOr-Aur 0544+3330: A New YSO Outburst in the Outskirts of Auriga OB1, Viewed Face-On
Lynne A. Hillenbrand, Adolfo S. Carvalho, Dan Stern +5
We present a newly appreciated FU Ori outburst event that began in 2019 and reached a peak in early 2021. Suspected young stellar object WISE J054452.25+333009.6 experienced substa…
Spectral Biases, Starspot Morphology, and Dynamo Transitions on the Pre-Main Sequence: Insights from the X-Shooter WTTS Library
Facundo Pérez Paolino, Jeff Bary, Benjamin Horner +2
Starspots are ubiquitous in young, low-mass stars, yet their impact on the spectral classification and fundamental parameter inference of pre-main sequence stars (PMS) has been lar…
Rosette Nebula Outburst Gaia 24djk from the Young Stellar Object V557 Mon
Adolfo S. Carvalho, Lynne A. Hillenbrand
A previously faint young stellar object (YSO), V557 Mon, rapidly brightened in late 2024 and is currently at least magnitudes brighter than its typical pre-outburst bright…
Bolometric Corrections for FU Ori Object Accretion Disk Luminosities
Adolfo S. Carvalho, Lynne A. Hillenbrand
The accretion luminosity of an FU Ori disk is a fundamental system parameter, but a challenging one to estimate for all but the most well-studied systems. FU Ori objects are dynami…
The FUV Spectrum of FU Ori South
Adolfo S. Carvalho, Gregory J. Herczeg, Kevin France +1
The eruptive YSO FU Ori is the eponym of its variable class. FU Ori stars are known to undergo outbursts with amplitudes of magnitudes in the band and durations of several…
An FUV-detected Accretion Shock at the Star-Disk Boundary of FU Ori
Adolfo S. Carvalho, Lynne A. Hillenbrand, Kevin France +1
FU Ori objects are the most extreme eruptive young stars known. Their 4 to 5 magnitude photometric outbursts last for decades and are attributed to a factor of up to 10,000 increas…
A Dust-Trapping Ring in the Planet-Hosting Disk of Elias 2-24
Adolfo S. Carvalho, Laura M. Perez, Anibal Sierra +12
Rings and gaps are among the most widely observed forms of substructure in protoplanetary disks. A gap-ring pair may be formed when a planet carves a gap in the disk, which produce…
The first Palomar Gattini-IR catalog of J-band light curves: construction and public data release
Shion Murakawa, Kishalay De, Michael C. B. Ashley +7
Palomar Gattini-IR (PGIR) is a wide-field, synoptic infrared time domain survey covering \,sq.\,deg. of the \textbf{accessible} sky at \,night cadence t…
An Expanding Accretion Disk and a Warm Disk Wind As Seen In the Spectral Evolution of HBC 722
Adolfo S. Carvalho, Lynne A. Hillenbrand, Jerome Seebeck +1
We present a comprehensive analysis of the post-outburst evolution of the FU Ori object HBC 722 in optical/near-infrared (NIR) photometry and spectroscopy. Using a modified viscous…
The Emerging Stellar Complex in Mon R2: Membership and Optical Variability Classification
Sally D. Jiang, Lynne A. Hillenbrand
Monoceros R2 (Mon R2) is one of the closest large active star-forming regions. This extremely young and partially embedded region provides an excellent laboratory for studying star…
New insights on the accretion properties of Class 0 protostars from 2 micron spectroscopy
Valentin J. M. Le Gouellec, Thomas P. Greene, Lynne A. Hillenbrand +1
Sun-like stars are thought to accrete most of their final mass during the protostellar phase, during which the stellar embryo is surrounded by an infalling dense envelope. We prese…
The 2022-2023 accretion outburst of the young star V1741 Sgr
Michael A. Kuhn, Lynne A. Hillenbrand, Michael S. Connelley +12
V1741 Sgr (= SPICY 71482/Gaia22dtk) is a Classical T Tauri star on the outskirts of the Lagoon Nebula. After at least a decade of stability, in mid-2022, the optical source brighte…