234 citations · 985 across the 23 of their papers we have counts for
23 papers
A New Spectral Class of Brown Dwarfs at the Bottom of the IMF in IC 348
K. L. Luhman, C. Alves de Oliveira
In a previous study, we used JWST to identify three new brown dwarfs in the center of a nearby star-forming cluster, IC 348. The faintest object had an estimated mass of 3-4 $M_{\r…
Medium Resolution 0.97-5.3 micron spectra of Very Young Benchmark Brown Dwarfs with NIRSpec onboard the James Webb Space Telescope
Elena Manjavacas, Pascal Tremblin, Stephan Birkmann +7
Spectra of young benchmark brown dwarfs with well-known ages are vital to characterize other brown dwarfs, for which ages are in general not known. These spectra are also crucial t…
JWST/NIRSpec Observations of the Coldest Known Brown Dwarf
K. L. Luhman, P. Tremblin, C. Alves de Oliveira +6
We present 1-5um spectroscopy of the coldest known brown dwarf, WISE J085510.83-071442.5 (WISE 0855), performed with the Near-Infrared Spectrograph (NIRSpec) on board the James Web…
On the origin of planetary-mass objects in NGC1333
Richard J. Parker, Catarina Alves de Oliveira
The dominant formation mechanism of brown dwarfs and planetary mass objects in star-forming regions is presently uncertain. Do they form like stars, via the collapse and fragmentat…
JWST/NIRSpec Observations of the Planetary Mass Companion TWA 27B
K. L. Luhman, P. Tremblin, S. M. Birkmann +8
We present 1-5um spectroscopy of the young planetary mass companion TWA 27B (2M1207B) performed with NIRSpec on board the James Webb Space Telescope. In these data, the fundamental…
In-orbit Performance of the Near-Infrared Spectrograph NIRSpec on the James Webb Space Telescope
T. Böker, T. L. Beck, S. M. Birkmann +47
The Near-Infrared Spectrograph (NIRSpec) is one of the four focal plane instruments on the James Webb Space Telescope. In this paper, we summarize the in-orbit performance of NIRSp…
Discovery of dusty sub-solar mass young stellar objects in NGC 346 with JWST/NIRCam
Olivia C. Jones, Conor Nally, Nolan Habel +23
JWST observations of NGC 346, a star-forming region in the metal-poor Small Magellanic Cloud, reveal a substantial population of sub-solar mass young stellar objects (YSOs) with IR…
ESA-Ariel Data Challenge NeurIPS 2022: Inferring Physical Properties of Exoplanets From Next-Generation Telescopes
Kai Hou Yip, Ingo P. Waldmann, Quentin Changeat +11
The study of extra-solar planets, or simply, exoplanets, planets outside our own Solar System, is fundamentally a grand quest to understand our place in the Universe. Discoveries i…
Dynamical histories of the IC348 and NGC1333 star-forming regions in Perseus
Richard J. Parker, Catarina Alves de Oliveira
We present analyses of the spatial distributions of stars in the young (1 - 3 Myr) star-forming regions IC348 and NGC1333 in the Perseus Giant Molecular Cloud. We quantify the spat…
A model-based approach to the spatial and spectral calibration of NIRSpec onboard JWST
Bernhard Dorner, Giovanna Giardino, Pierre Ferruit +8
Context: The NIRSpec instrument for the James Webb Space Telescope (JWST) can be operated in multiobject (MOS), long-slit, and integral field (IFU) mode with spectral resolutions f…
Young Stellar Object Variability (YSOVAR): Long Timescale Variations in the Mid-Infrared
L. M. Rebull, A. M. Cody, K. R. Covey +32
The YSOVAR (Young Stellar Object VARiability) Spitzer Space Telescope observing program obtained the first extensive mid-infrared (3.6 & 4.5 um) time-series photometry of the Orion…
Herschel's view of the large-scale structure in the Chamaeleon dark clouds
C. Alves de Oliveira, N. Schneider, B. Merín +17
The Chamaeleon molecular cloud complex is one of the nearest star-forming sites encompassing three molecular clouds with a different star-formation history, from quiescent (Cha III…
Herschel survey of brown dwarf disks in Rho Ophiuchi
C. Alves de Oliveira, P. Ábrahám, G. Marton +6
Recent observations of the Rho Ophiuchi cluster with the Herschel Space Observatory allow us to probe the spectral energy distribution (SED) of the brown dwarf population in the fa…
The Herschel Gould Belt Survey in Chamaeleon II - Properties of cold dust in disks around young stellar objects
L. Spezzi, N. L. J. Cox, T. Prusti +14
We report on the Herschel Gould Belt survey (HGBS) of ChaII, focusing on the detection of Class I to III young stellar objects (YSOs). We aim at characterizing the circumstellar ma…
Identification of transitional disks in Chamaeleon with Herschel
Á. Ribas, B. Merín, H. Bouy +11
Transitional disks are circumstellar disks with inner holes that in some cases are produced by planets and/or substellar companions in these systems. For this reason, these disks a…
A molecular outflow driven by the brown dwarf binary FU Tau
J. -L. Monin, E. Whelan, B. Lefloch +2
We report the detection of a molecular outflow driven by the brown dwarf binary FU Tau. Using the IRAM 30 m telescope we observed the CO(2-1) (CO) emission in the vicinity o…
Searching for planetary-mass T-dwarfs in the core of Serpens
L. Spezzi, C. Alves de Oliveira, E. Moraux +5
We searched for isolated planetary-mass T-dwarfs in the 3Myr old Serpens Core cluster. We performed a deep imaging survey of the central part of this cluster using the WIRCam camer…
A search for mass segregation of stars and brown dwarfs in ρ Ophiuchi
Richard J. Parker, Thomas Maschberger, Catarina Alves de Oliveira
We apply two different algorithms to search for mass segregation to a recent observational census of the rho Ophiuchi star forming region. Firstly, we apply the Lambda_MSR method,…
An unusual very low-mass high-amplitude pre-main sequence periodic variable
Maria V. Rodriguez-Ledesma, Reinhard Mundt, Mansur Ibrahimov +5
We have investigated the nature of the variability of CHS7797, an unusual periodic variable in the Orion Nebula Cluster. An extensive I-band photometric data set of CHS7797 was com…
The dusty environment of HD 97300 as seen by Herschel and Spitzer
Á. Kóspál, T. Prusti, N. L. J. Cox +9
Aims. We analyze the surroundings of HD 97300, one of two intermediate-mass stars in the Chamaeleon I star-forming region. The star is known to be surrounded by a conspicuous ring…
Spectroscopy of new brown dwarf members of rho Ophiuchi and an updated initial mass function
C. Alves de Oliveira, E. Moraux, J. Bouvier +1
To investigate the universality hypothesis of the initial mass function in the substellar regime, the population of the rho Ophiuchi molecular cloud is analysed by including a new…
YSOVAR: the first sensitive, wide-area, mid-IR photometric monitoring of the ONC
M. Morales-Calderón, J. R. Stauffer, L. A. Hillenbrand +33
We present initial results from time series imaging at infrared wavelengths of 0.9 sq. degrees in the Orion Nebula Cluster (ONC). During Fall 2009 we obtained 81 epochs of Spitzer…
The low-mass population of the Rho Ophiuchi molecular cloud
C. Alves de Oliveira, E. Moraux, J. Bouvier +3
Star formation theories are currently divergent regarding the fundamental physical processes that dominate the substellar regime. Observations of nearby young open clusters allow t…