Publications (67)
Resolving the cold debris disc around a planet-hosting star: PACS photometric imaging observations of q1 Eri (HD10647, HR506)
R. Liseau, C. Eiroa, D. Fedele +32
About two dozen exo-solar debris systems have been spatially resolved. These debris discs commonly display a variety of structural features such as clumps, rings, belts, eccentric…
Brown dwarfs and very low mass stars in the Hyades cluster : a dynamically evolved mass function
J. Bouvier, T. T. Kendall, G. Meeus +9
We conducted a search for brown dwarfs (BDs) and very low mass (VLM) stars in the 625 Myr-old Hyades cluster in order to derive the cluster's mass function across the stellar-subst…
DZ Cha: a bona fide photoevaporating disc
H. Canovas, B. Montesinos, M. R. Schreiber +14
DZ Cha is a weak-lined T Tauri star (WTTS) surrounded by a bright protoplanetary disc with evidence of inner disc clearing. Its narrow $\Ha$ line and infrared spectral energy distr…
Herschel PACS Observations and Modeling of Debris Disks in the Tucana-Horologium Association
J. K. Donaldson, A. Roberge, C. H. Chen +9
We present Herschel PACS photometry of seventeen B- to M-type stars in the 30 Myr-old Tucana-Horologium Association. This work is part of the Herschel Open Time Key Programme "Gas…
Cold dust around nearby stars (DUNES). First results: A resolved exo-Kuiper belt around the solar-like star zeta^2 Ret
C. Eiroa, D. Fedele, J. Maldonado +46
We present the first far-IR observations of the solar-type stars delta Pav, HR 8501, 51 Peg and zeta^2 Ret, taken within the context of the DUNES Herschel Open Time Key Programme (…
The 10 m infrared band of silicate dust: A laboratory study comparing the aerosol and KBr pellet techniques
A. Tamanai, H. Mutschke, J. Blum +1
The profile of the silicate 10 m IR band contains important information about the evolutional stage of dust in circumstellar environments and the possible ongoing process of pl…
Dust, Ice and Gas in Time (DIGIT) Herschel program first results: A full PACS-SED scan of the gas line emission in protostar DK Cha
T. A. van Kempen, J. D. Green, N. J. Evans +42
DK Cha is an intermediate-mass star in transition from an embedded configuration to a star plus disk stage. We aim to study the composition and energetics of the circumstellar mate…
The Long-Lived Disks in the Eta Chamaeleontis Cluster
A. Sicilia-Aguilar, J. Bouwman, A. Juhasz +8
We present IRS spectra and revised MIPS photometry for the 18 members of the Eta Chamaeleontis cluster. Aged 8 Myr, the Eta Cha cluster is one of the few nearby regions within the…
Relation between metallicities and spectral energy distributions of Herbig Ae/Be stars. A potential link with planet formation
J. Guzman-Diaz, B. Montesinos, I. Mendigutia +5
(Abridged) The stellar metallicity, [M/H], may have important implications for planet formation. In particular, Kama et al. proposed that the deficit of refractory elements in the…
Herschel-PACS observation of the 10 Myr old T Tauri disk TW Hya: Constraining the disk gas mass
W. F. Thi, G. Mathews, F. Ménard +49
Planets are formed in disks around young stars. With an age of ~10 Myr, TW Hya is one of the nearest T Tauri stars that is still surrounded by a relatively massive disk. In additio…
Herschel observations of the circumstellar environment of the two Herbig Be stars R Mon and PDS27
M. J. Jiménez-Donaire, G. Meeus, A. Karska +4
We report and analyse FIR observations of two Herbig Be stars, R Mon and PDS 27, obtained with Herschel's instruments PACS and SPIRE. We construct SEDs and derive the infrared exce…
Constraining the structure of the transition disk HD 135344B (SAO 206462) by simultaneous modeling of multiwavelength gas and dust observations
A. Carmona, C. Pinte, W. F. Thi +14
HD 135344B is an accreting (pre-) transition disk that displays the emission of warm CO extending tens of AU inside its 30 AU dust cavity. We used the dust radiative transfer code…
An icy Kuiper-Belt around the young solar-type star HD 181327
J. Lebreton, J. -C. Augereau, W. -F. Thi +18
HD 181327 is a young F5/F6V star belonging to the Beta Pictoris moving group (12 Myr). It harbors an optically thin belt of circumstellar material at 90 AU. We aim to study the dus…
Nature of the gas and dust around 51 Oph
W. F. Thi, F. Ménard, G. Meeus +11
Circumstellar disc evolution is paramount for the understanding of planet formation. The GASPS program aims at determining the circumstellar gas and solid mass around ~250 pre-main…
Correlations between the stellar, planetary and debris components of exoplanet systems observed by
J. P. Marshall, A. Moro-MartÃn, C. Eiroa +18
The DEBRIS, DUNES and GT programmes observed 37 exoplanet host stars within 25 pc at 70, 100 and 160 m with the sensitivity to detect far-infrared excess em…
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…
The composition of circumstellar gas and dust in 51 Oph
M. E. van den Ancker, G. Meeus, J. Cami +2
We analyze ISO archive data of the nearby bright emission-line star 51 Oph, previously classified as a proto-planetary system similar to beta Pic. The infrared spectrum reveals the…
Herschel Observations of Gas and Dust in the Unusual 49 Ceti Debris Disk
A. Roberge, I. Kamp, B. Montesinos +12
We present far-IR/sub-mm imaging and spectroscopy of 49 Ceti, an unusual circumstellar disk around a nearby young A1V star. The system is famous for showing the dust properties of…
Herschel discovery of a new class of cold, faint debris discs
C. Eiroa, J. P. Marshall, A. Mora +25
We present Herschel PACS 100 and 160 micron observations of the solar-type stars alpha Men, HD 88230 and HD 210277, which form part of the FGK stars sample of the Herschel Open Tim…
Kinematics of Ionized Gas at 0.01 AU of TW Hya
M. Goto, A. Carmona, H. Linz +4
We report two-dimensional spectroastrometry of Br gamma emission of TW Hya to study the kinematics of the ionized gas in the star-disk interface region. The spectroastrometry with…
The Evolution of Disk Winds from a Combined Study of Optical and Infrared Forbidden Lines
I. Pascucci, A. Banzatti, U. Gorti +18
We analyze high-resolution (dv=<10km/s) optical and infrared spectra covering the [OI] 6300 angstrom and [NeII] 12.81 micron lines from a sample of 31 disks in different evolutiona…
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…
Detection of warm water vapour in Taurus protoplanetary discs by Herschel
P. Riviere-Marichalar, F. Ménard, W. F. Thi +12
Line spectra of 68 Taurus T Tauri stars were obtained with the Herschel-PACS (Photodetector Array Camera & Spectrometer) instrument as part of the GASPS (Gas Evolution in Protoplan…
The A-shell star Phi Leo revisited: its photospheric and circumstellar spectra
C. Eiroa, B. Montesinos, I. Rebollido +7
Variable red- and blue-shifted absorption features observed in the Ca ii K line towards the A-type shell star Leo have been suggested by us in a previous work to be likely due…
Spitzer's view on aromatic and aliphatic hydrocarbon emission in Herbig Ae stars
B. Acke, J. Bouwman, A. Juhash +5
The chemistry of astronomical hydrocarbons, responsible for the well-known infrared emission features detected in a wide variety of targets, remains enigmatic. Here we focus on the…
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…
HD 172555: detection of 63 microns [OI] emission in a debris disc
P. Riviere-Marichalar, D. Barrado, J. -C. Augereau +14
Context. HD 172555 is a young A7 star belonging to the Beta Pictoris Moving Group that harbours a debris disc. The Spitzer IRS spectrum of the source showed mid-IR features such as…
Accretion-related properties of Herbig Ae/Be stars. Comparison with T Tauris
I. MendigutÃa, A. Mora, B. Montesinos +4
We look for trends relating the mass accretion rate (Macc) and the stellar ages (t), spectral energy distributions (SEDs), and disk masses (Mdisk) for a sample of 38 HAeBe stars, c…
Herschel evidence for disk flattening or gas depletion in transitional disks
J. T. Keane, I. Pascucci, C. Espaillat +6
Transitional disks are protoplanetary disks characterized by reduced near- and mid-infrared emission with respect to full disks. This characteristic spectral energy distribution in…
Gas in the protoplanetary disc of HD 169142: Herschel's view
G. Meeus, C. Pinte, P. Woitke +50
In an effort to simultaneously study the gas and dust components of the disc surrounding the young Herbig Ae star HD 169142, we present far-IR observations obtained with the PACS i…
GASPS observations of Herbig Ae/Be stars with PACS/Herschel. The atomic and molecular content of their protoplanetary discs
G. Meeus, B. Montesinos, I. Mendigutia +3
We observed a sample of 20 representative Herbig Ae/Be stars and five A-type debris discs with PACS onboard of Herschel. The observations were done in spectroscopic mode, and cover…
Accretion variability of Herbig Ae/Be stars observed by X-Shooter. HD 31648 and HD 163296
I. MendigutÃa, S. D. Brittain, C. Eiroa +6
This work presents X-Shooter/VLT spectra of the prototypical, isolated Herbig Ae stars HD 31648 (MWC 480) and HD 163296 over five epochs separated by timescales ranging from days t…
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…
Mid-IR observations of circumstellar disks -- Part III: A mixed sample of PMS stars and Vega-type objects
O. Schuetz, G. Meeus, M. F. Sterzik +1
We present new mid-infrared spectra for a sample of 15 targets (1 FU Orionis object, 4 Herbig Ae stars, 5 T Tauri stars and 5 Vega type stars), obtained with the TIMMI2 camera at L…
Detection of CH+ emission from the disc around HD100546
W. -F. Thi, F. Ménard, G. Meeus +13
Despite its importance in the thermal-balance of the gas and in the determination of primeval planetary atmospheres, the chemistry in protoplanetary discs remains poorly constraine…
The far-infrared behaviour of Herbig Ae/Be discs: Herschel PACS photometry
N. Pascual, B. Montesinos, G. Meeus +3
Herbig Ae/Be objects are pre-main sequence stars surrounded by gas- and dust-rich circumstellar discs. These objects are in the throes of star and planet formation, and their chara…
Uncertainties in water chemistry in disks: An application to TW Hya
I. Kamp, W. -F. Thi, G. Meeus +7
Context. This paper discusses the sensitivity of water lines to chemical processes and radiative transfer for the protoplanetary disk around TW Hya. The study focuses on the Hersch…
Optical spectroscopic variability of Herbig Ae/Be stars
I. MendigutÃa, C. Eiroa, B. Montesinos +4
We analysed 337 multi-epoch optical spectra of 38 Herbig Ae/Be (HAeBe) stars to gain insights into the variability behaviour of the circumstellar (CS) atomic gas. Equivalent widths…
Herschel GASPS spectral observations of T Tauri stars in Taurus: unraveling far-infrared line emission from jets and discs
M. Alonso-Martinez, P. Riviere-Marichalar, G. Meeus +5
At early stages of stellar evolution young stars show powerful jets and/or outflows that interact with protoplanetary discs and their surroundings. Despite the scarce knowledge abo…
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…
Exocomet signatures around the A-shell star Leo?
C. Eiroa, I. Rebollido, B. Montesinos +18
We present an intensive monitoring of high-resolution spectra of the Ca {\sc ii} K line in the A7IV shell star Leo at very short (minutes, hours), short (night to night), and…
First results of the Herschel Key Program 'Dust, Ice and Gas in Time': Dust and Gas Spectroscopy of HD 100546
B. Sturm, J. Bouwman, Th. Henning +40
We present far-infrared spectroscopic observations, taken with the Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory, of the protoplanetary disk…
The 69 micron forsterite band in spectra of protoplanetary disks - Results from the Herschel DIGIT programme
B. Sturm, J. Bouwman, Th. Henning +14
Context: We have analysed Herschel-PACS spectra of 32 circumstellar disks around Herbig Ae/Be and T-Tauri stars obtained within the Herschel key programme DIGIT. In this paper we f…
HD 100453: A Link Between Gas-Rich Protoplanetary Disks and Gas-Poor Debris Disks
K. A. Collins, C. A. Grady, K. Hamaguchi +15
HD 100453 has an IR spectral energy distribution (SED) which can be fit with a power-law plus a blackbody. Previous analysis of the SED suggests that the system is a young Herbig A…
DIGIT survey of far-infrared lines from protoplanetary disks I
D. Fedele, S. Bruderer, E. F. van Dishoeck +10
[abridged] We present far-infrared spectroscopic observations of PMS stars taken with Herschel/PACS as part of the DIGIT key project. The sample includes 22 Herbig AeBe and 8 T Tau…
Dust evolution in protoplanetary disks around Herbig Ae/Be stars - The Spitzer view
A. Juhasz, J. Bouwman, Th. Henning +7
In this paper we present mid-infrared spectra of a comprehensive set of Herbig Ae/Be stars observed with the Spitzer Space Telescope. The signal-to-noise ratio of these spectra is…
The absence of the 10 um silicate feature in the isolated Herbig Ae star HD 100453
G. Meeus, J. Bouwman, C. Dominik +2
We analyse the optical and IR spectra, as well as the spectral energy distribution (UV to mm) of the candidate Herbig Ae star HD100453. This star is particular, as it shows an ener…
A Herschel resolved far-infrared dust ring around HD 207129
J. P. Marshall, T. Löhne, B. Montesinos +26
Dusty debris discs around main sequence stars are thought to be the result of continuous collisional grinding of planetesimals in the system. The majority of these systems are unre…
DUst Around NEarby Stars. The survey observational results
C. Eiroa, J. P. Marshall, A. Mora +47
Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems. Their solar system's counterparts are the asteroid and Edgew…
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…
Constraining the mass of the planet(s) sculpting a disk cavity. The intriguing case of 2MASS J16042165-2130284
H. Canovas, A. Hardy, A. Zurlo +10
The large cavities observed in the dust and gas distributions of transition disks may be explained by planet-disk interactions. At ~145 pc, 2MASS J16042165-2130284 (J1604) is a 5-1…
GASPS - a Herschel survey of gas and dust in Protoplanetary Disks: Summary and Initial Statistics
W. R. F. Dent, W. F. Thi, I. Kamp +47
GASPS is a far-infrared line and continuum survey of protoplanetary and young debris disks using PACS on the Herschel Space Observatory. The survey includes [OI] at 63 microns, as…
The Herschel view of Gas in Protoplanetary Systems (GASPS). First comparisons with a large grid of models
C. Pinte, P. Woitke, F. Menard +49
The Herschel GASPS Key Program is a survey of the gas phase of protoplanetary discs, targeting 240 objects which cover a large range of ages, spectral types, and disc properties. T…
Chandra Orion Ultradeep Project: Observations and Source Lists
K. V. Getman, E. Flaccomio, P. S. Broos +21
We present a description of the data reduction methods and the derived catalog of more than 1600 X-ray point sources from the exceptionally deep January 2003 Chandra X-ray Observat…
Gas in Protoplanetary Discs (GASPS) 1. First results
G. S. Mathews, W. R. F. Dent, J. P. Williams +50
Context - Circumstellar discs are ubiquitous around young stars, but rapidly dissipate their gas and dust on timescales of a few Myr. The Herschel space observatory allows for the…
First evidence for a spatially resolved disk structure around the Herbig Ae star R CrA
S. Correia, R. Koehler, G. Meeus +1
We present mid-infrared interferometric observations of the Herbig Ae star R CrA obtained with MIDI at the VLTI using several projected baselines in the UT2-UT3 configuration. The…
A scaled-up planetary system around a supernova progenitor
V. Squicciarini, R. Gratton, M. Janson +24
Virtually all known exoplanets reside around stars with ; to clarify if the dearth of planets around more massive stars is real, we launched the direct-imaging B-sta…
ISO spectroscopy of circumstellar dust in 14 Herbig Ae/Be systems: towards an understanding of dust processing
G. Meeus, L. B. F. M. Waters, J. Bouwman +3
We present Infrared Space Observatory (ISO) spectra of fourteen isolated Herbig Ae/Be (HAEBE) stars, to study the characteristics of their circumstellar dust. These spectra show la…
Homogeneous study of Herbig Ae/Be stars from spectral energy distributions and Gaia EDR3
J. Guzman-Diaz, I. Mendigutia, B. Montesinos +6
(Abridged) Herbig Ae/Be stars (HAeBes) have so far been studied based on relatively small samples that are scattered throughout the sky. Their fundamental stellar and circumstellar…
HR 10: A main-sequence binary with circumstellar envelopes around both components. Discovery and analysis
B. Montesinos, C. Eiroa, J. Lillo-Box +16
This paper is framed within a large project devoted to studying the presence of circumstellar material around main sequence stars, and looking for exocometary events. The work conc…
MBM 12: young protoplanetary discs at high galactic latitude
G. Meeus, A. Juhasz, Th. Henning +6
(abridged) We present Spitzer infrared observations to constrain disc and dust evolution in young T Tauri stars in MBM 12, a star-forming cloud at high latitude with an age of 2 My…
Exocomets: A spectroscopic survey
I. Rebollido, C. Eiroa, B. Montesinos +18
While exoplanets are now routinely detected, the detection of small bodies in extrasolar systems remains challenging. Since the discovery of sporadic events interpreted as exocomet…
The co-existence of hot and cold gas in debris discs
I. Rebollido, C. Eiroa, B. Montesinos +19
Debris discs have often been described as gas-poor discs as the gas-to-dust ratio is expected to be considerably lower than in primordial,protoplanetary discs. However, recent obse…
Low abundance, strong features: Window-dressing crystalline forsterite in the disk wall of HD 100546
G. D. Mulders, L. B. F. M. Waters, C. Dominik +10
Forsterite is one of the crystalline dust species that is often observed in protoplanetary disks and solar system comets. Being absent in the interstellar medium, it must be produc…
Why the Northern Hemisphere Needs a 30-40 m Telescope and the Science at Stake. How do Planetary Systems Form?
I. MendigutÃa, N. Huélamo, I. Jiménez-Serra +32
The detection and characterization of protoplanets in protoplanetary disks around young stars is emerging as a transformative field that will redefine our understanding of how plan…
Lithium and the evolution of intermediate-mass T Tauri and Herbig stars. Rotation, accretion, and planets
I. MendigutÃa, J. Campbell-White, B. Montesinos +9
(Abridged) We contribute to our understanding of the evolution of young intermediate-mass stars by providing a comprehensive analysis of their lithium (Li) content. A sample of 71…
Mid-IR spectroscopy of T Tauri stars in Chamealeon I: evidence for processed dust at the earliest stages
G. Meeus, M. Sterzik, J. Bouwman +1
We present mid-IR spectroscopy of three T Tauri stars in the young Chamealeon I dark cloud obtained with TIMMI2 on the ESO 3.6m telescope. In these three stars, the silicate emissi…