Details

Autor(en) / Beteiligte

• MENDIGUTIA, I
• Fairlamb, J
• Montesinos, B
• Oudmaijer, R D
• Najita, J R
• Brittain, S D
• VAN DEN ANCKER, M E

Titel

STELLAR PARAMETERS AND ACCRETION RATE OF THE TRANSITION DISK STAR HD 142527 FROM X-SHOOTER

Ist Teil von

• The Astrophysical journal, 2014-07, Vol.790 (1), p.1-8

Ort / Verlag

United States

Erscheinungsjahr

2014

Quelle

EZB-FREE-00999 freely available EZB journals

Beschreibungen/Notizen

• HD 142527 is a young pre-main-sequence star with properties indicative of the presence of a giant planet and/or a low-mass stellar companion. We have analyzed an X-Shooter/Very Large Telescope spectrum to provide accurate stellar parameters and accretion rate. This stellar age provides further constraints to the mass of the possible companion estimated by Biller et al., being between 0.20 and 0.35 M sub([middot in circle]). Stellar accretion rates obtained from UV Balmer excess modeling and optical photospheric line veiling, and from the correlations with several emission lines spanning from the UV to the near-IR, are consistent with each other. This suggests that almost all gas transferred between both components of the disk is not trapped by the possible planet(s) in between but fall onto the central star, although it is discussed how the gap flow rate could be larger than previously suggested.