Interferometric observations of pre-main sequence disks

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Constraining the wind launching region in Herbig
Ae stars AMBER/VLTI spectroscopy of HD 104237
E. Tatulli, A. Isella, A. Natta AMBER
consortium 2007, AA, 464, 55
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Introduction
Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
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Introduction
Gas accretes on the central star ?
Continuum UV emission veiling ? Hydrogen
ricombination lines (H?, Br?) ? IR
molecular line emission (CO, H2O) ?
Stellar variability ? Jets and outflow
(angular momentum dissipation)
Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
4
HD 104237

• Herbig Ae (A4-A8, SED, UV emission lines)

• distance 116 pc

• age 5 Myr

• mass 2.5 M?

• incl 18 ? 14

• v sin i 12 ? 2 km/sec

• v 30 130 Km/sec

• B 50 G

t ? 106 yr
Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
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HD 104237

• Herbig Ae (A4-A8, SED, UV emission lines)

• Jet seen in Ly-? Grady et al. (2004)

• H? emission with P-cygni profile Feigelson et
  al. 2003)

• Spectroscopic K companion Böhm et al.
  (2003) orbiting in 20 days, L1/L2 10,
  m1/m2 1.3

• Br? emission with single peak profile
  Fline/Fcont 35 ISAAC spectrum

Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
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AMBER observations

• Base line 35 m, ? ?/2B 6 mas spec.
  binary ?1.3 mas unresolved

• K 4.6 detection limit fringes in 25 frames

• One calibrator VLTI vibrations ?
  absolute visibility calibration not reliable
  ? differential visibility not affected if the
  disk is resolved ! ? continuum calibration
  from puffed-up inner rim model Isella
  Natta, 2005

Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
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IR continuum emission model

• Puffed-up inner rim Natta et al. (2001),
  Tuthill et al. (2001), Dullemond et al. (2001),
  Millan-Gabet et al. (2001), Eisner et al. (2003),
  Isella et al. (2006), Monnier et al. (2006)

The rim dominate the NIR emission
Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
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IR continuum emission model
Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
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Br? emission magnetospheric accretion

• From Rstar to the corotational/magnetospheric
  radius ( 0.1 AU)

No!
Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
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Br? emission gas within the disk

• From Rcorot to Rrim ( 0.45 AU)
  Najita et al. (2007 at PPV)

Ni!
Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
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Br? emission outflowing wind
Andrea Isella Grenoble AMBER workshop,
Sunday, 31 May 2020
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Thank you for your attention