8.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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36 papers · 2 filters
The Herschel HIFI water line survey in the low-mass proto-stellar outflow L1448
G. Santangelo, B. Nisini, T. Giannini +8
As part of the WISH (Water In Star-forming regions with Herschel) key project, we report on the observations of several ortho- and para-H2O lines performed with the HIFI instrument…
Metallicity of M dwarfs II. A comparative study of photometric metallicity scales
V. Neves, X. Bonfils, N. C. Santos +6
Stellar parameters are not easily derived from M dwarf spectra, which are dominated by complex bands of diatomic and triatomic molecules and not well described at the line by line…
Gas modelling in the disc of HD 163296
I. Tilling, P. Woitke, G. Meeus +19
We present detailed model fits to observations of the disc around the Herbig Ae star HD 163296. This well-studied object has an age of ~ 4 Myr, with evidence of a circumstellar dis…
The evolution of embedded star clusters
F. I. Pelupessy, S. Portegies Zwart
We study the evolution of embedded clusters. The equations of motion of the stars in the cluster are solved by direct N-body integration while taking the effects of stellar evoluti…
Detection of the Water Reservoir in a Forming Planetary System
Michiel R. Hogerheijde, Edwin A. Bergin, Christian Brinch +12
Icy bodies may have delivered the oceans to the early Earth, yet little is known about water in the ice-dominated regions of extra-solar planet-forming disks. The Heterodyne Instru…
A Search for Interstellar Carbon Chain Alcohol HC4OH in Star-Forming Region L1527 and Dark Cloud TMC-1
Mitsunori Araki, Shuro Takano, Hiromichi Yamabe +6
We report a sensitive search for the rotational transitions of the carbon chain alcohol HC4OH in the frequency range of 21.2-46.7 GHz in the star-forming region L1527 and the dark…
VLBA SiO maser observations of the OH/IR star OH 44.8-2.3: magnetic field and morphology
N. Amiri, W. H. T. Vlemmings, A. J. Kemball +1
SiO maser emission occurs in the extended atmosphere of evolved stars and can be studied at high angular resolution. Very long baseline interferometry (VLBI) observations of Mira v…
The 2008 outburst of EX Lup - silicate crystals in motion
Attila Juhasz, Cornelis Dullemond, Roy van Boekel +12
EX Lup is the prototype of the EXor class of eruptive young stars. These objects show optical outbursts which are thought to be related to runaway accretion onto the star. In a pre…
Possible planet-forming regions on submillimetre images
Zs. Regaly, A. Juhasz, Zs. Sandor +1
Submillimetre images of transition discs are expected to reflect the distribution of the optically thin dust. Former observation of three transition discs LkHa330, SR21N, and HD135…
Modelling Herschel observations of hot molecular gas emission from embedded low-mass protostars
R. Visser, L. E. Kristensen, S. Bruderer +6
Aims. Young stars interact vigorously with their surroundings, as evident from the highly rotationally excited CO (up to Eup=4000 K) and H2O emission (up to 600 K) detected by the…
Millimeter interferometric observations of FU Orionis-type objects in Cygnus
Ágnes Kóspál
FU Orionis-type objects (FUors) are low-mass young eruptive stars that represent an evolutionary phase characterized by episodic periods of increased accretion rate from the disk t…
Molecular gas in young debris disks
A. Moór, P. Ábrahám, A. Juhász +7
Gas-rich primordial disks and tenuous gas-poor debris disks are usually considered as two distinct evolutionary phases of the circumstellar matter. Interestingly, the debris disk a…
The young B-star quintuple system HD 155448
O. Schuetz, G. Meeus, A. Carmona +2
Until now, HD 155448 has been known as a post-AGB star and listed as a quadruple system. In this paper, we study the system in depth and reveal that the B component itself is a bin…
Spectroscopic properties of Young Stellar Objects in the Lupus Molecular Clouds
Annelies Mortier, Isa Oliveira, Ewine F. van Dishoeck
The results of an optical spectroscopic survey of a sample of young stellar objects (YSOs) and pre-main sequence (PMS) stars in the Lupus Clouds are presented. 92 objects were obse…
Multi-Wavelength Study of the 2008-2009 Outburst of V1647 Ori
D. Garcia-Alvarez, N. J. Wright, J. J. Drake +11
V1647 Ori is a young eruptive variable star, illuminating a reflection nebula (McNeil's Nebula). It underwent an outburst in 2003 before fading back to its pre-outburst brightness…
Silicate features in Galactic and extragalactic post-AGB discs
C. Gielen, J. Bouwman, H. Van Winckel +7
Aims. In this paper we study the Spitzer and TIMMI2 infrared spectra of post-AGB disc sources, both in the Galaxy and the LMC. Using the observed infrared spectra we determine the…
Planetary Construction Zones in Occultation: Discovery of an Extrasolar Ring System Transiting a Young Sun-like Star and Future Prospects for Detecting Eclipses by Circumsecondary and Circumplanetary Disks
Eric E. Mamajek, Alice C. Quillen, Mark J. Pecaut +5
<abridged> The large relative sizes of circumstellar and circumplanetary disks imply that they might be seen in eclipse in stellar light curves. We estimate that a survey of ~10^4…
The properties and polarization of the H2O and CH3OH maser environment of NGC7538-IRS1
G. Surcis, W. H. T. Vlemmings, R. M. Torres +2
NGC7538 is a complex massive star-forming region. The region is composed of several radio continuum sources, one of which is IRS1, a high-mass protostar, from which a 0.3 pc molecu…
Disks and Outflows in CO Rovibrational Emission from Embedded, Low-Mass Young Stellar Objects
Gregory J. Herczeg, Joanna M. Brown, Ewine F. van Dishoeck +1
Young circumstellar disks that are still embedded in dense molecular envelopes may differ from their older counterparts, but are historically difficult to study because emission fr…
Coagulation and Fragmentation in molecular clouds. II. The opacity of the dust aggregate size distribution
C. W. Ormel, M. Min, A. G. G. M. Tielens +2
The dust size distribution in molecular clouds can be strongly affected by ice-mantle formation and (subsequent) grain coagulation. Following previous work where the dust size dist…
First hyperfine resolved far-infrared OH spectrum from a star-forming region
S. F. Wampfler, S. Bruderer, L. E. Kristensen +9
OH is an important molecule in the H2O chemistry and the cooling budget of star-forming regions. The goal of the Herschel key program `Water in Star-forming regions with Herschel'…
Water in low-mass star-forming regions with Herschel (WISH-LM): High-velocity H2O bullets in L1448-MM observed with HIFI
L. E. Kristensen, E. F. van Dishoeck, M. Tafalla +4
Herschel-HIFI observations of water in the low-mass star-forming object L1448-MM, known for its prominent outflow, are presented, as obtained within the `Water in star-forming regi…
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…
Massive young disks around Herbig Ae stars
Jeremie Boissier, Tomas Alonso-Albi, Asuncion Fuente +4
Herbig Ae stars (HAe) are the precursors of Vega-type systems and, therefore, crucial objects in planet formation studies. Thus far, only a few disks associated with HAe stars have…