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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…