567 citations · 3.2k across the 40 of their papers we have counts for
41 papers
HD 152384: A 5 Myr old debris disk system showing a gaseous ring of refractory elements at the dust sublimation radius
Mario van den Ancker, Daniela Iglesias, Olja Panić +2
Context: Circumstellar gas around young stars provides key insights into planet formation and disk evolution. HD 152384, a young (5 Myr) A0 V star in Sco-Cen, shows hybrid-disk tra…
Spatially resolving polycyclic aromatic hydrocarbons in Herbig Ae disks with VISIR-NEAR at the VLT
Gideon Yoffe, Roy van Boekel, Aigen Li +15
We use the long-slit spectroscopy mode of the VISIR-NEAR experiment to perform diffraction-limited observations of eight nearby Herbig Ae protoplanetary disks. We extract spectra f…
CRIRES on sky at the ESO Very Large Telescope
R. J. Dorn, P. Bristow, J. V. Smoker +49
The CRyogenic InfraRed Echelle Spectrograph (CRIRES) Upgrade project CRIRES extended the capabilities of CRIRES. It transformed this VLT instrument into a cross-dispersed spe…
X-Shooter Survey of Young Intermediate Mass Stars -- I. Stellar Characterization and Disc Evolution
Daniela P. Iglesias, Olja Panić, Mario van den Ancker +6
Intermediate mass stars (IMSs) represent the link between low-mass and high-mass stars and cover a key mass range for giant planet formation. In this paper, we present a spectrosco…
Multi-epoch, high spatial resolution observations of multiple T Tauri systems
Gergely Csépány, Mario van den Ancker, Péter Ábrahám +4
Context. In multiple pre-main-sequence systems the lifetime of circumstellar disks appears to be shorter than around single stars, and the actual dissipation process may depend on…
A spectroscopic survey of Herbig Ae/Be stars with X-Shooter II: Accretion diagnostic lines
John R Fairlamb, Rene D Oudmaijer, Ignacio Mendigutia +2
The Herbig Ae/Be stars (HAeBes) allow an exploration of the properties of Pre-Main Sequence(PMS) stars above the low-mass range () and those bordering…
A gas density drop in the inner 6 AU of the transition disk around the Herbig Ae star HD 139614: Further evidence for a giant planet inside the disk?
A. Carmona, W. F. Thi, I. Kamp +16
Context: Quantifying the gas content inside the dust gaps of transition disks is important to establish their origin. Aims: We seek to constrain the surface density of warm gas in…
Regaining the FORS: making optical ground-based transmission spectroscopy of exoplanets with VLT+FORS2 possible again
Henri M. J. Boffin, Elyar Sedaghati, Guillaume Blanchard +10
Transmission spectroscopy facilitates the detection of molecules and/or clouds in the atmospheres of exoplanets. Such studies rely heavily on space-based or large ground-based obse…
Variability in the CO ro-vibrational lines from HD163296
Rosina P. Hein Bertelsen, I. Kamp, G. van der Plas +4
We present for the first time a direct comparison of multi-epoch (2001-2002 and 2012) CO ro-vibrational emission lines from HD163296. We find that both the line shapes and the FWHM…
Spectroscopy and Linear Spectropolarimetry of the early Herbig Be Stars PDS 27 and PDS 37
K. M. Ababakr, J. R. Fairlamb, R. D. Oudmaijer +1
The number of well-studied early-type pre-main-sequence objects is very limited, hampering the study of massive star formation from an observational point of view. Here, we present…
A spectroscopic survey of Herbig Ae/Be stars with X-Shooter I: Stellar parameters and accretion rates
J. R. Fairlamb, R. D. Oudmaijer, I. Mendigutía +2
Herbig Ae/Be stars span a key mass range that links low and high mass stars, and thus provide an ideal window from which to explore their formation. This paper presents VLT/X-Shoot…
Examining the T Tauri system with SPHERE
Gergely Csépány, Mario van den Ancker, Péter Ábrahám +2
Context. The prototypical low-mass young stellar object, T Tauri, is a well-studied multiple system with at least three components. Aims. We aim to explore the T Tau system with th…
On the asymmetry of the OH ro-vibrational lines in HD 100546
D. Fedele, S. Bruderer, M. E. van den Anckerm +1
We present multi-epoch high-spectral resolution observations with VLT/CRIRES of the OH doublet P4.5 (1+,1-) (2.934 m) towards the protoplanetary disk around HD 10054…
The structure of disks around Herbig Ae/Be stars as traced by CO ro-vibrational emission
G. van der Plas, M. E. van den Ancker, L. B. F. M. Waters +1
We study the emission and absorption of CO ro-vibrational lines in the spectra of intermediate mass pre-main-sequence stars with the aim to determine both the spatial distribution…
Investigating the inner discs of Herbig Ae/Be stars with CO bandhead and Br Gamma emission
John D. Ilee, John Fairlamb, Rene D. Oudmaijer +4
Herbig Ae/Be stars lie in the mass range between low and high mass young stars, and therefore offer a unique opportunity to observe any changes in the formation processes that may…
Stellar parameters and accretion rate of the transition disk star HD 142527 from X-Shooter
I. Mendigutía, J. Fairlamb, B. Montesinos +4
HD 142527 is a young pre-main sequence star with properties indicative of the presence of a giant planet or/and a low-mass stellar companion. We have analyzed an X-Shooter/Very Lar…
CO ro-vibrational lines in HD100546: A search for disc asymmetries and the role of fluorescence
R. P. Hein Bertelsen, I. Kamp, M. Goto +5
We have studied the emission of CO ro-vibrational lines in the disc around the Herbig Be star HD100546 with the final goal of using these lines as a diagnostic to understand inner…
Identifying gaps in flaring Herbig Ae/Be disks using spatially resolved mid-infrared imaging. Are all group I disks transitional?
K. M. Maaskant, M. Honda, L. B. F. M. Waters +6
*Context The evolution of young massive protoplanetary disks toward planetary systems is expected to include the formation of gaps and the depletion of dust and gas. *Aims A specia…
Warm gas at 50 AU in the disk around Herbig Be star HD 100546
M. Goto, G. van der Plas, M. van den Ancker +6
The disk atmosphere is one of the fundamental elements of theoretical models of a protoplanetary disk. However, the direct observation of the warm gas (>> 100 K) at large radius of…
HD 144432: a young triple system
A. Mueller, A. Carmona, M. E. van den Ancker +3
We present new imaging and spectroscopic data of the young Herbig star HD 144432 A, which was known to be a binary star with a separation of 1.47 arcsec. High-resolution NIR imagin…
A survey for near-infrared H2 emission in Herbig Ae/Be stars: emission from the outer disks of HD 97048 and HD 100546
A. Carmona, G. van der Plas, M. E. van den Ancker +5
We report on a sensitive search for H2 1-0 S(1), 1-0 S(0) and 2-1 S(1) ro-vibrational emission at 2.12, 2.22 and 2.25 micron in a sample of 15 Herbig Ae/Be stars employing CRIRES,…
Near-infrared spectroscopy of EX Lupi in outburst
Á. Kóspál, P. Ábrahám, M. Goto +6
EX Lup is the prototype of the EXor class of young eruptive stars: objects showing repetitive brightenings due to increased accretion from the circumstellar disk to the star. In th…
HD 135344B: a young star has reached its rotational limit
André Müller, Mario van den Ancker, Ralf Launhardt +3
We search for periodic variations in the radial velocity of the young Herbig star HD 135344B with the aim to determine a rotation period. We analyzed 44 high-resolution optical spe…
Fundamental Vibrational Transition of CO during the Outburst of EX Lupi in 2008
M. Goto, Zs. Regály, C. P. Dullemond +16
We report monitoring observations of the T Tauri star EX Lupi during its outburst in 2008 in the CO fundamental band at 4.6-5.0 um. The observations were carried out at the VLT and…