TY - JOUR
T1 - Towards a Comprehensive View of Accretion, Inner Disks, and Extinction in Classical T Tauri Stars
T2 - An ODYSSEUS Study of the Orion OB1b Association
AU - Pittman, Caeley V.
AU - Espaillat, Catherine C.
AU - Robinson, Connor E.
AU - Thanathibodee, Thanawuth
AU - Calvet, Nuria
AU - Wendeborn, John
AU - Hernández, Jesus
AU - Manara, Carlo F.
AU - Walter, Fred
AU - Ábrahám, Péter
AU - Alcalá, Juan M.
AU - Alencar, Sílvia H.P.
AU - Arulanantham, Nicole
AU - Cabrit, Sylvie
AU - Eislöffel, Jochen
AU - Fiorellino, Eleonora
AU - France, Kevin
AU - Gangi, Manuele
AU - Grankin, Konstantin
AU - Herczeg, Gregory J.
AU - Kóspál, Ágnes
AU - Mendigutía, Ignacio
AU - Serna, Javier
AU - Venuti, Laura
N1 - Publisher Copyright:
© 2022. The Author(s). Published by the American Astronomical Society.
PY - 2022/11/1
Y1 - 2022/11/1
N2 - The coevolution of T Tauri stars and their surrounding protoplanetary disks dictates the timescales of planet formation. In this paper, we present magnetospheric accretion and inner disk wall model fits to near-UV (NUV) to near-IR (NIR) spectra of nine classical T Tauri stars in Orion OB1b as part of the Outflows and Disks around Young Stars: Synergies for the Exploration of ULLYSES Spectra (ODYSSEUS) survey. Using NUV-optical spectra from the Hubble UV Legacy Library of Young Stars as Essential Standards (ULLYSES) Director’s Discretionary Program and optical-NIR spectra from the PENELLOPE VLT Large Programme, we find that the accretion rates of these targets are relatively high for the region’s intermediate age of 5.0 Myr; rates are in the range of (0.5-17.2) × 10−8 M ☉ yr−1, with a median value of 1.2 × 10−8 M ☉ yr−1. The NIR excesses can be fit with 1200-1800 K inner disk walls located at 0.05-0.10 au from the host stars. We discuss the significance of the choice in extinction law, as the measured accretion rate depends strongly on the adopted extinction value. This analysis will be extended to the complete sample of T Tauri stars being observed through ULLYSES to characterize accretion and inner disks in star-forming regions of different ages and stellar populations.
AB - The coevolution of T Tauri stars and their surrounding protoplanetary disks dictates the timescales of planet formation. In this paper, we present magnetospheric accretion and inner disk wall model fits to near-UV (NUV) to near-IR (NIR) spectra of nine classical T Tauri stars in Orion OB1b as part of the Outflows and Disks around Young Stars: Synergies for the Exploration of ULLYSES Spectra (ODYSSEUS) survey. Using NUV-optical spectra from the Hubble UV Legacy Library of Young Stars as Essential Standards (ULLYSES) Director’s Discretionary Program and optical-NIR spectra from the PENELLOPE VLT Large Programme, we find that the accretion rates of these targets are relatively high for the region’s intermediate age of 5.0 Myr; rates are in the range of (0.5-17.2) × 10−8 M ☉ yr−1, with a median value of 1.2 × 10−8 M ☉ yr−1. The NIR excesses can be fit with 1200-1800 K inner disk walls located at 0.05-0.10 au from the host stars. We discuss the significance of the choice in extinction law, as the measured accretion rate depends strongly on the adopted extinction value. This analysis will be extended to the complete sample of T Tauri stars being observed through ULLYSES to characterize accretion and inner disks in star-forming regions of different ages and stellar populations.
UR - https://www.scopus.com/pages/publications/85141371229
U2 - 10.3847/1538-3881/ac898d
DO - 10.3847/1538-3881/ac898d
M3 - Article
AN - SCOPUS:85141371229
SN - 0004-6256
VL - 164
JO - Astronomical Journal
JF - Astronomical Journal
IS - 5
M1 - 201
ER -