Publications (34)
MINDS. Cha Hα 1, a brown dwarf with a hydrocarbon-rich disk
MarÃa Morales-Calderón, Hyerin Jang, Aditya M. Arabhavi +23
Context. Recent JWST observations have shown that brown dwarfs (BD) are chemically rich, offering valuable insights into giant planet formation. Aims. As part of the MIRI mid-INfra…
The Chemical Inventory of the Inner Regions of Planet-forming Disks -- The JWST/MINDS Program
Inga Kamp, Thomas Henning, Aditya M. Arabhavi +40
The understanding of planet formation has changed recently, embracing the new idea of pebble accretion. This means that the influx of pebbles from the outer regions of planet-formi…
The ionising effect of low energy cosmic rays from a class II object on its protoplanetary disk
Donna Rodgers-Lee, Andrew M. Taylor, Tom P. Ray +1
We investigate the ionising effect of low energy cosmic rays (CRs) from a young star on its protoplanetary disk (PPD). We consider specifically the effect of GeV protons i…
MINDS. JWST-MIRI Observations of a Spatially Resolved Atomic Jet and Polychromatic Molecular Wind Toward SY Cha
Kamber R. Schwarz, Matthias Samland, Göran Olofsson +21
The removal of angular momentum from protostellar systems drives accretion onto the central star and may drive the dispersal of the protoplanetary disk. Winds and jets can contribu…
SO2, silicate clouds, but no CH4 detected in a warm Neptune
Achrene Dyrek, Michiel Min, Leen Decin +44
WASP-107b is a warm (~740 K) transiting planet with a Neptune-like mass of ~30.5 Earth masses and Jupiter-like radius of ~0.94 Jupiter radius, whose extended atmosphere is eroding.…
The active weak-line T Tauri star LkCa 4 observed with SPIRou and TESS
Benjamin Finociety, Jean-François Donati, Konstantin Grankin +6
We report results of a spectropolarimetric and photometric monitoring of the weak-line T Tauri star LkCa 4 within the SPIRou Legacy Survey large programme, based on data collected…
First unambiguous detection of ammonia in the atmosphere of a planetary mass companion with JWST/MIRI coronagraphs
Mathilde Mâlin, Anthony Boccaletti, Clément Perrot +28
The newly accessible mid-infrared (MIR) window offered by the James Webb Space Telescope (JWST) for exoplanet imaging is expected to provide valuable information to characterize th…
The Spitzer survey of interstellar clouds in the Gould Belt. II. The Cepheus Flare observed with IRAC and MIPS
Jason M. Kirk, Derek Ward-Thompson, James Di Francesco +14
We present Spitzer IRAC (~2 deg^2) and MIPS (~8 deg^2) observations of the Cepheus Flare which is associated with the Gould Belt, at an approximate distance of ~300 pc. Around 6500…
Radio continuum observations of Class I protostellar disks in Taurus: constraining the greybody tail at centimetre wavelengths
Anna M. M. Scaife, Jane V. Buckle, Rachael E. Ainsworth +18
We present deep 1.8 cm (16 GHz) radio continuum imaging of seven young stellar objects in the Taurus molecular cloud. These objects have previously been extensively studied in the…
GMRT detections of low mass young stars at 323 and 608 MHz
Rachael E. Ainsworth, Anna M. M. Scaife, David A. Green +2
We present the results of a pathfinder project conducted with the Giant Metrewave Radio Telescope (GMRT) to investigate protostellar systems at low radio frequencies. The goal of t…
The first detection of a low-frequency turnover in nonthermal emission from the jet of a young star
Anton Feeney-Johansson, Simon J. D. Purser, Tom P. Ray +4
Radio emission in jets from young stellar objects (YSOs) in the form of nonthermal emission has been seen toward several YSOs. Thought to be synchrotron emission from strong shocks…
Investigating episodic accretion in a very low-mass young stellar object
Camille Stock, Alessio Caratti o Garatti, Pauline McGinnis +4
Very low-mass Class I protostars have been investigated very little thus far. Variability of these young stellar objects (YSOs) and whether or not they are capable of strong episod…
First rest-frame infrared spectrum of a z>7 quasar: JWST/MRS observations of J1120+0641
Sarah E. I. Bosman, Javier Ãlvarez-Márquez, Luis Colina +29
We present a JWST/MRS spectrum of the quasar J1120+0641 at z=7.0848, the first spectroscopic observation of a reionisation-era quasar in the rest-frame infrared (m).…
Investigating 2MASS J06593158-0405277: a FUor burst in a triple system?
Alessio Caratti o Garatti, Rebeca Garcia Lopez, Tom P. Ray +7
FUor outbursts in young stellar objects (YSOs) are the most dramatic events among episodic accretion phenomena. The origin of these bursts is not clear: disk instabilities and/or d…
MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field
Göran Ãstlin, Pablo G. Pérez-González, Jens Melinder +41
The recently launched James Webb Space Telescope (JWST) is opening new observing windows on the distant universe. Among JWST's instruments, the Mid Infrared Instrument (MIRI) offer…
The Role of Magnetic Fields in Protostellar Outflows and Star Formation
Ralph E. Pudritz, Tom P. Ray
The role of outflows in the formation of stars and the protostellar disks that generate them is a central question in astrophysics. Outflows are associated with star formation acro…
A search for radio emission from exoplanets around evolved stars
Eamon O'Gorman, Colm P. Coughlan, Wouter Vlemmings +4
The majority of searches for radio emission from exoplanets have to date focused on short period planets, i.e., the so-called hot Jupiter type planets. However, these planets are l…
A GMRT survey of regions towards the Taurus Molecular Cloud at 323 and 608 MHz
Rachael E. Ainsworth, Colm P. Coughlan, David A. Green +2
We present observations of three active sites of star formation in the Taurus Molecular Cloud complex taken at 323 and 608 MHz (90 and 50 cm, respectively) with the Giant Metrewave…
MINDS. The DR Tau disk I: combining JWST-MIRI data with high-resolution CO spectra to characterise the hot gas
Milou Temmink, Ewine F. van Dishoeck, Sierra L. Grant +29
The MRS mode of the JWST-MIRI instrument has been shown to be a powerful tool to characterise the molecular gas emission of the inner region of planet-forming disks. Here, we analy…
Accretion variability in RU Lup
Camille Stock, Pauline McGinnis, Alessio Caratti o Garatti +2
The process of accretion in classical T Tauri stars (CTTSs) has been observed to vary on different timescales. Studying this variability is vital to understanding a star's evolutio…
Global multifluid simulations of the magnetorotational instability in radially stratified protoplanetary disks
Donna Rodgers-Lee, Tom P. Ray, Turlough P. Downes
The redistribution of angular momentum is a long standing problem in our understanding of protoplanetary disk (PPD) evolution. The magnetorotational instability (MRI) is considered…
AMI radio continuum observations of young stellar objects with known outflows
AMI Consortium, :, Rachael E. Ainsworth +20
We present 16 GHz (1.9 cm) deep radio continuum observations made with the Arcminute Microkelvin Imager (AMI) of a sample of low-mass young stars driving jets. We combine these new…
MINDS: Mid-infrared atomic and molecular hydrogen lines in the inner disk around a low-mass star
Riccardo Franceschi, Thomas Henning, Benoît Tabone +27
This work aims to measure the mass accretion rate, the accretion luminosity, and more generally the physical conditions of the warm emitting gas in the inner disk of the very low-m…
MINDS. The detection of CO with JWST-MIRI indicates abundant CO in a protoplanetary disk
Sierra L. Grant, Ewine F. van Dishoeck, Benoît Tabone +43
We present JWST-MIRI MRS spectra of the protoplanetary disk around the low-mass T Tauri star GW Lup from the MIRI mid-INfrared Disk Survey (MINDS) GTO program. Emission from $^{12}…
MINDS: The JWST MIRI Mid-INfrared Disk Survey
Thomas Henning, Inga Kamp, Matthias Samland +39
The study of protoplanetary disks has become increasingly important with the Kepler satellite finding that exoplanets are ubiquitous around stars in our galaxy and the discovery of…
Resolving the collimation zone of an intermediate-mass protostar
Adriana R. RodrÃguez-Kamenetzky, Carlos Carrasco-González, Luis Felipe RodrÃguez Jorge +12
We report new VLA and e-MERLIN high resolution and sensitivity images of the Triple Radio continuum Source in the Serpens star forming region. These observations allowed us to perf…
MIRI-JWST mid-infrared direct imaging of the debris disk of HD106906
Daniel Rouan, Anthony Boccaletti, Clément Perrot +20
We report MIRI-JWST coronagraphic observations at 11.3 and 15.5 mic of the debris disk around the young star HD 106906. The observations were made to characterize the structure, te…
Combined analysis of the 12.8 and 15 JWST/MIRI eclipse observations of TRAPPIST-1 b
Elsa Ducrot, Pierre-Olivier Lagage, Michiel Min +36
The first JWST/MIRI photometric observations of TRAPPIST-1 b allowed for the detection of the thermal emission of the planet at 15 , suggesting that the planet could be a bare…
A LOFAR detection of the low mass young star T Tau at 149 MHz
Colm P. Coughlan, Rachael E. Ainsworth, Jochen Eislöffel +15
Radio observations of young stellar objects (YSOs) enable the study of ionised plasma outflows from young protostars via their free-free radiation. Previous studies of the low-mass…
Sub-arcsecond high sensitivity measurements of the DG~Tau jet with e-MERLIN
Rachael E. Ainsworth, Tom P. Ray, Anna M. M. Scaife +2
We present very high spatial resolution deep radio continuum observations at 5 GHz (6 cm) made with e-MERLIN of the young stars DG Tau A and B. Assuming it is launched very close (…
Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI
Mathilde Mâlin, Anthony Boccaletti, Clément Perrot +26
Mid-infrared imaging of exoplanets and disks is now possible with the coronagraphs of the MIRI on the JWST. This wavelength range unveils new features of young directly imaged syst…
MINDS. JWST-MIRI Reveals a Dynamic Gas-Rich Inner Disk Inside the Cavity of SY Cha
Kamber R. Schwarz, Thomas Henning, Valentin Christiaens +24
SY Cha is a T Tauri star surrounded by a protoplanetary disk with a large cavity seen in the millimeter continuum but has the spectral energy distribution (SED) of a full disk. Her…
Tentative Evidence for Relativistic Electrons Generated by the Jet of the Young Sun-like Star DG Tau
Rachael E. Ainsworth, Anna M. M. Scaife, Tom P. Ray +3
Synchrotron emission has recently been detected in the jet of a massive protostar, providing further evidence that certain jet formation characteristics for young stars are similar…
MINDS. Abundant water and varying C/O across the disk of Sz 98 as seen by JWST/MIRI
Danny Gasman, Ewine F. van Dishoeck, Sierra L. Grant +41
MIRI/MRS on board the JWST allows us to probe the inner regions of protoplanetary disks. Here we examine the disk around the classical T Tauri star Sz 98, which has an unusually la…