8.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Leiden Observatory3.6k papers
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82 papers · 2 filters
High resolution observations of molecular emission lines toward the CI Tau proto-planetary disc: planet-carved gaps or shadowing?
Giovanni P. Rosotti, John D. Ilee, Stefano Facchini +4
Recent observations have revealed that most proto-planetary discs show a pattern of bright rings and dark gaps. However, most of the high-resolution observations have focused only…
The TW Hya Rosetta Stone Project III: Resolving the Gaseous Thermal Profile of the Disk
Jenny Calahan, Edwin Bergin, Ke Zhang +16
The thermal structure of protoplanetary disks is a fundamental characteristic of the system that has wide reaching effects on disk evolution and planet formation. In this study, we…
A highly non-Keplerian protoplanetary disc: Spiral structure in the gas disc of CQ Tau
Lisa Wölfer, Stefano Facchini, Nicolas T. Kurtovic +9
In the past years, high angular resolution observations have revealed that circumstellar discs appear in a variety of shapes with diverse substructures being ubiquitous. This has g…
Astrochemistry associated with planet formation
Ewine F. van Dishoeck, Edwin A. Bergin
This paper provides a brief summary and overview of the astrochemistry associated with the formation of stars and planets. It is aimed at new researchers in the field to enable the…
Spiral Arm Pattern Motion in the SAO 206462 Protoplanetary Disk
Chengyan Xie, Bin Ren, Ruobing Dong +5
Spiral arms have been observed in more than a dozen protoplanetary disks, yet the origin of nearly all systems is under debate. Multi-epoch monitoring of spiral arm morphology offe…
Rapid CO gas dispersal from NO Lup's class III circumstellar disc
J. B. Lovell, G. M. Kennedy, S. Marino +9
We observed the K7 class III star NO Lup in an ALMA survey of the 1-3 Myr Lupus association and detected circumstellar dust and CO gas. Here we show that the J = 3-2 CO emission is…
Chemically tracing the water snowline in protoplanetary disks with HCO
M. Leemker, M. L. R. van 't Hoff, L. Trapman +4
[Abridged] Planet formation is expected to be enhanced around snowlines in protoplanetary disks, in particular around the water snowline. However, the close proximity of the water…
Is TiO emission present in the ultra-hot Jupiter WASP-33b? A reassessment using the improved ExoMol Toto line list
Dilovan B. Serindag, Stevanus K. Nugroho, Paul Mollière +3
[abridged] Efficient absorption of stellar UV and visible radiation by TiO and VO is predicted to drive temperature inversions in the upper atmospheres of hot Jupiters. However, fe…
Oort cloud Ecology II: Extra-solar Oort clouds and the origin of asteroidal interlopers
Simon Portegies Zwart
We simulate the formation and evolution of Oort clouds around the 200 nearest stars (within 16pc according to the Gaia DR2) database. This study is performed by numerically integra…
Searching for proto-planets with MUSE
C. Xie, S. Y. Haffert, J. de Boer +5
Protoplanetary disks contain structures such as gaps, rings, and spirals, which are thought to be produced by the interaction between the disk and embedded protoplanets. However, o…
Detection of the hydrogen Balmer lines in the ultra-hot Jupiter WASP-33b
F. Yan, A. Wyttenbach, N. Casasayas-Barris +24
Ultra-hot Jupiters (UHJs) are highly irradiated giant exoplanets with extremely high day-side temperatures, which lead to thermal dissociation of most of the molecular species. It…
Re-analysis of the 267-GHz ALMA observations of Venus: No statistically significant detection of phosphine
I. A. G. Snellen, L. Guzman-Ramirez, M. R. Hogerheijde +2
Context: ALMA observations of Venus at 267 GHz have been presented in the literature that show the apparent presence of phosphine (PH3) in its atmosphere. Phosphine has currently n…
The TW Hya Rosetta Stone Project I: Radial and vertical distributions of DCN and DCO+
Karin I. Oberg, L. Ilsedore Cleeves, Jennifer B. Bergner +16
Molecular D/H ratios are frequently used to probe the chemical past of Solar System volatiles. Yet it is unclear which parts of the Solar Nebula hosted an active deuterium fraction…
Direct radio discovery of a cold brown dwarf
H. K. Vedantham, J. R. Callingham, T. W. Shimwell +9
Magnetospheric processes seen in gas-giants such as aurorae and circularly-polarized cyclotron maser radio emission have been detected from some brown dwarfs. However, previous rad…
Spitzer's Solar System studies of asteroids, planets and the zodiacal cloud
David Trilling, Carey Lisse, Dale P. Cruikshank +13
In its 16 years of scientific measurements, the Spitzer Space Telescope performed a number of ground-breaking infrared measurements of Solar System objects. In this second of two p…
ALMA Survey of Lupus Class III Stars: Early Planetesimal Belt Formation and Rapid Disk Dispersal
J. B. Lovell, M. C. Wyatt, M. Ansdell +9
Class III stars are those in star forming regions without large non-photospheric infrared emission, suggesting recent dispersal of their protoplanetary disks. We observed 30 class…
Prestellar grain-surface origins of deuterated methanol in comet 67P/Churyumov-Gerasimenko
Maria N. Drozdovskaya, Isaac R. H. G. Schroeder, Martin Rubin +6
Deuterated methanol is one of the most robust windows astrochemists have on the individual chemical reactions forming deuterium-bearing molecules and the physicochemical history of…
A single-armed spiral in the protoplanetary disk around HD34282 ?
J. de Boer, C. Ginski, G. Chauvin +17
During the evolution of protoplanetary disks into planetary systems we expect to detect signatures that trace mechanisms such as planet-disk interaction. Protoplanetary disks displ…
Gemini Planet Imager Spectroscopy of the Dusty Substellar Companion HD 206893 B
K. Ward-Duong, J. Patience, K. Follette +55
We present new near-infrared Gemini Planet Imager (GPI) spectroscopy of HD 206893 B, a substellar companion orbiting within the debris disk of its F5V star. The , , , and…
Direct confirmation of the radial-velocity planet Pic c
M. Nowak, S. Lacour, A. -M. Lagrange +90
Methods used to detect giant exoplanets can be broadly divided into two categories: indirect and direct. Indirect methods are more sensitive to planets with a small orbital period,…
Temperature inversions on hot super-Earths: the case of CN in nitrogen-rich atmospheres
Mantas Zilinskas, Yamila Miguel, Yipeng Lyu +1
We show that in extremely irradiated atmospheres of hot super-Earths shortwave absorption of CN can cause strong temperature inversions. We base this study on previous observations…
Multi-wavelength continuum sizes of protoplanetary discs: scaling relations and implications for grain growth and radial drift
Marco Tazzari, Cathie J. Clarke, Leonardo Testi +5
We analyse spatially resolved ALMA observations at 0.9, 1.3, and 3.1 mm for the 26 brightest protoplanetary discs in the Lupus star-forming region. We characterise the discs multi-…
The first ALMA survey of protoplanetary discs at 3 mm: demographics of grain growth in the Lupus region
Marco Tazzari, Leonardo Testi, Antonella Natta +9
We present the first ALMA survey of protoplanetary discs at 3 mm, targeting 36 young stellar objects in the Lupus star-forming region with deep observations (sensitivity 20-50 micr…
Planet formation and disk mass dependence in a pebble-driven scenario for low mass stars
Spandan Dash, Yamila Miguel
Measured disk masses seem to be too low to form the observed population of planetary systems. In this context, we develop a population synthesis code in the pebble accretion scenar…