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The UV Legacy Library of Young Stars as Essential Standards (ULLYSES) Large Director’s Discretionary Program with Hubble. I. Goals, Design, and Initial Results

  • Authors: Julia Roman-Duval, William J. Fischer, Alexander W. Fullerton, Jo Taylor, Rachel Plesha, Charles Proffitt, TalaWanda Monroe, Travis C. Fischer, Alessandra Aloisi, Jean-Claude Bouret, Christopher Britt, Nuria Calvet, Joleen K. Carlberg, Paul A. Crowther, Gisella De Rosa, William V. Dixon, Catherine C. Espaillat, Christopher J. Evans, Andrew J. Fox, Kevin France, Miriam Garcia, Scott W. Fleming, Elaine M. Frazer, Ana I. Gómez de Castro, Gregory J. Herczeg, Svea Hernandez, Alec S. Hirschauer, Bethan L. James, Christopher M. Johns-Krull, Claus Leitherer, Sean Lockwood, Joan Najita, M. S. Oey, Cristina Oliveira, Tyler Pauly, I. Neill Reid, Adric Riedel, David R. Rodriguez, David Sahnow, Ravi Sankrit, Kenneth R. Sembach, Richard Shaw, Linda J. Smith, S. Tony Sohn, Debopam Som, Leonardo Úbeda, Daniel E. Welty

Julia Roman-Duval et al 2025 The Astrophysical Journal 985 .

  • Provider: AAS Journals

Caption: Figure 5.

Spectral time series of BP Tau around the C IV (left panels), He II (middle panels), and Mg II (right panels) lines. The top two rows correspond to the first epoch of observations (2021 August), while the bottom two rows were obtained in late 2022. The spectral time series are displayed as line plots showing flux variations color coded by days elapsed (top panels), and as images showing the line profiles variations with time (color coded by flux level).

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