Open AccessClose Companions to the T Tauri Stars CVSO 109 and CVSO 165 Observed by the HST ULLYSES Program
Author(s) -
Charles Proffitt,
Julia Roman-Duval,
Joanna M. Taylor,
TalaWanda R. Monroe,
Travis C. Fischer,
William J. Fischer,
A. W. Fullerton,
Alessandra Aloisi,
C. T. Britt,
I. Busko,
Joleen K. Carlberg,
Gisella De Rosa,
Elaine M. Frazer,
Svea Hernández,
Alec S. Hirschauer,
Bethan L. James,
R. Jędrzejewski,
Sean Lockwood,
Cristina Oliveira,
Rachel Plesha,
Adric R. Riedel,
Allyssa Riley,
David J. Sahnow,
Ravi Sankrit,
Richard A. Shaw,
Linda J. Smith,
Sangmo Tony Sohn,
Debopam Som,
Leonardo Úbeda,
D. E. Welty
Publication year - 2021
Publication title -
research notes of the aas
Language(s) - English
Resource type - Journals
ISSN - 2515-5172
DOI - 10.3847/2515-5172/abe852
Subject(s) - t tauri star , stars , physics , hubble space telescope , astrophysics , astronomy , ultraviolet , spitzer space telescope , optics
The Hubble Space Telescope (HST) Ultraviolet Legacy Library of Young Stars as Essential Standards (ULLYSES) program is a HST Director's Discretionary program that is in the process of obtaining a large library of ultraviolet spectroscopic observations of young stars of both high and low masses. We present information on close companions to the T Tauri stars CVSO 109 and CVSO 165 in Orion that were observed with the HST as part of this program. CVSO 109 has a fainter companion at an angular separation ρ = 0.″64 near PA = 218° and Δ(F28X50LP) ≈ 0.6 mag, while the CVSO 165 companion is at ρ = 0.″30 near PA = 326° with Δ(F28X50LP) ≈ 1.7 mag. Both components of CVSO 165 appear to be active stars with strong emission features, while the CVSO 109 companion shows only modest indications of stellar activity. Extracted spectra for each of these components will be included in ULLYSES Data Release 2.