Accretion in 9 Orion OB1b T-Tauri stars Virtual Observatory Resource

Authors
  1. Pittman C.V.
  2. Espaillat C.C.
  3. Robinson C.E.
  4. Thanathibodee T.
  5. Calvet N.,Wendeborn J.
  6. Hernandez J.
  7. Manara C.F.
  8. Walter F.
  9. Abraham P.
  10. Alcala J.M.,Alencar S.H.P.
  11. Arulanantham N.
  12. Cabrit S.
  13. Eisloffel J.
  14. Fiorellino E.,France K.
  15. Gangi M.
  16. Grankin K.
  17. Herczeg G.J.
  18. Kospal A.
  19. Mendigutia I.,Serna J.
  20. Venuti L.
  21. Published by
    CDS
Abstract

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 5.0Myr; rates are in the range of (0.5-17.2)x10^-8^M{sun}/yr, with a median value of 1.2x10^-8^M{sun}/yr. The NIR excesses can be fit with 1200-1800K inner disk walls located at 0.05-0.10au 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.

Keywords
  1. stellar-associations
  2. pre-main-sequence-stars
  3. accretion
  4. spectroscopy
  5. ultraviolet-astronomy
  6. visible-astronomy
  7. infrared-astronomy
Bibliographic source Bibcode
2022AJ....164..201P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/201
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/164/201
Document Object Identifer DOI
doi:10.26093/cds/vizier.51640201

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History

2023-02-01T08:54:26Z
Resource record created
2023-02-01T08:54:26Z
Created
2023-02-15T07:17:40Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr