183 citations · 2.5k across the 43 of their papers we have counts for
15 papers · 1 filter
Evidence for CO depletion in the inner regions of gas-rich protoplanetary disks
G. van der Plas, M. E. van den Ancker, B. Acke +4
We investigate the physical properties and spatial distribution of Carbon Monoxide (CO) gas in the disks around the Herbig Ae/Be stars HD 97048 and HD 100546. Using high-spectral-r…
The structure of the protoplanetary disk surrounding three young intermediate mass stars. II. Spatially resolved dust and gas distribution
D. Fedele, M. E. van den Ancker, B. Acke +7
[Abridged] We present the first direct comparison of the distribution of the gas, as traced by the [OI] 6300 AA emission, and the dust, as traced by the 10 micron emission, in the…
MWC 297: a young high-mass star rotating at critical velocity
B. Acke, T. Verhoelst, M. E. van den Ancker +9
MWC 297 is a young massive nearby B[e] star. The central star has a large projected rotational velocity of 350 km/s. Despite the wealth of published observations, the nature of thi…
Probing the Early Evolution of Young High-Mass Stars
E. Puga, A. Bik, L. B. M. F. Waters +22
Near-infrared imaging surveys of high-mass star-forming regions reveal an amazingly complex interplay between star formation and the environment (Churchwell et al. 2006; Alvarez et…
The Structure of Protoplanetary Disks Surrounding Three Young Intermediate Mass Stars. I. Resolving the disk rotation in the [OI] 6300 Åline
G. van der Plas, M. E. van den Ancker, D. Fedele +4
We present high spectral resolution optical spectra of three young intermediate mass stars, in all of which we spectrally resolve the 6300 Angstrom [OI] emission line. Two of these…
Direct diameter measurement of a star filling its Roche Lobe: The semi-detached binary SS Leporis spatially resolved with VINCI/VLTI
T. Verhoelst, E. van Aarle, B. Acke
Stellar evolution in close binary systems is strongly influenced by mass transfer from one star to the other when one component fills its zero-velocity surface or Roche Lobe. SS Le…
A survey for nanodiamond features in the 3 micron spectra of Herbig Ae/Be stars
B. Acke, M. E. van den Ancker
We have carried out a survey of 60 Herbig Ae/Be stars in the 3 micron wavelength region in search for the rare spectral features at 3.43 and 3.53 micron. These features have been a…
Resolving the disk rotation of HD 97048 and HD 100546 in the [O I] 6300A line: evidence for a giant planet orbiting HD 100546
B. Acke, M. E. van den Ancker
Aims. We intend to spatially and spectrally resolve the [O I] emission region in two nearby Herbig stars. Methods. We present high-resolution (R = 80,000) VLT/UVES echelle spectra…
Disk and wind interaction in the young stellar object MWC 297 spatially resolved with VLTI/AMBER
F. Malbet, M. Benisty, W. J. De Wit +15
The young stellar object MWC 297 has been observed with the VLT interferometer equipped with the AMBER instrument. MWC 297 has been spatially resolved in the continuum with a visib…
Asteroseismology of the Beta Cephei star 12 (DD) Lacertae: photometric observations, pulsational frequency analysis and mode identification
G. Handler, M. Jerzykiewicz, E. Rodriguez +28
We report a multisite photometric campaign for the Beta Cephei star 12 Lacertae. 750 hours of high-quality differential photoelectric Stromgren, Johnson and Geneva time-series phot…
[O I] 6300A emission in Herbig Ae/Be systems: signature of Keplerian rotation
B. Acke, M. E. van den Ancker, C. P. Dullemond
We present high spectral-resolution optical spectra of 49 Herbig Ae/Be stars in a search for the [O I] 6300A line. The vast majority of the stars in our sample show narrow (FWHM <…
Chemical analysis of 24 dusty (pre-)main-sequence stars
Bram Acke, Christoffel Waelkens
We have analysed the chemical photospheric composition of 24 Herbig Ae/Be and Vega-type stars in search for the lambda Bootis phenomenon. We present the results of the elemental ab…
[O I] 6300 A Emission from Disks Around Herbig Ae/Be Stars
M. E. van den Ancker, B. Acke, C. P. Dullemond
We present high spectral-resolution optical spectra of 49 Herbig Ae/Be stars in a search for the [O I] 6300.2 A line. The vast majority of the stars in our sample show narrow (FWHM…
The Stellar Composition of the Star Formation Region CMa R1 -- III. A new outburst of the Be star component in Z CMa
M. E. van den Ancker, P. F. C. Blondel, H. R. E. Tjin A Djie +5
We report on a recent event in which, after more than a decade of slowly fading, the visual brightness of the massive young binary Z CMa suddenly started to rise by about 1 magnitu…
Explaining UXOR variability with self-shadowed disks
C. P. Dullemond, M. E. van den Ancker, B. Acke +1
In this Letter we propose a new view on UX Orionis type variability. The idea is based on the earlier proposal by various authors that UXORs are nearly-edge-on disks in which hydro…