Massimo Robberto
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View article: A Mid-infrared Spectroscopic Study of Young Stellar Objects in the SMC Region NGC 346: JWST Detects Dust, Accretion, Ices, and Outflows
A Mid-infrared Spectroscopic Study of Young Stellar Objects in the SMC Region NGC 346: JWST Detects Dust, Accretion, Ices, and Outflows Open
We present mid-infrared spectroscopic observations of intermediate-to-high-mass young stellar objects (YSOs) in the low-metallicity star-forming region NGC 346 located within the Small Magellanic Cloud (SMC). We conduct these integral fiel…
View article: A Near-infrared Spectral Library of Very Young Brown Dwarfs and Planetary Mass Objects in the Orion Nebula Cluster
A Near-infrared Spectral Library of Very Young Brown Dwarfs and Planetary Mass Objects in the Orion Nebula Cluster Open
Age-benchmark brown dwarf and planetary-mass-object spectroscopy is key to characterizing substellar evolution. In this paper, we present the JHK medium-resolution ( R ∼ 3000) spectra of 25 7–76 M Jup (spectral types L3.0–M6.0) brown dwarf…
View article: Observation of an accreting planetary-mass companion with signs of disc–disc interaction in Orion
Observation of an accreting planetary-mass companion with signs of disc–disc interaction in Orion Open
Young (≲10 Myr) planetary-mass companions (PMCs) provide valuable insights into the formation and early evolution of planetary systems. To date, only a dozen such objects have been identified through direct imaging. Using JWST/NIRCam obser…
View article: First Detection of Ices in Intermediate-mass Young Stellar Objects beyond the Milky Way
First Detection of Ices in Intermediate-mass Young Stellar Objects beyond the Milky Way Open
Using NIRSpec on JWST, we studied a sample of 15 intermediate-mass (1.8–4.1 M ⊙ ) young stellar objects (YSOs) previously identified with MIRI photometry in the low-metallicity NGC 346 star-forming cluster in the Small Magellanic Cloud. Al…
View article: First detection of ices in intermediate-mass young stellar objects beyond the Milky Way
First detection of ices in intermediate-mass young stellar objects beyond the Milky Way Open
Using NIRSpec on JWST, we studied a sample of 15 intermediate-mass (1.8-4.1 Msun) young stellar objects (YSOs) previously identified with MIRI photometry in the low-metallicity NGC 346 star-forming cluster in the Small Magellanic Cloud (SM…
View article: LZ-STAR Survey: Low-metallicity Star Formation Survey of Sh2-284. I. Ordered Massive Star Formation in the Outer Galaxy
LZ-STAR Survey: Low-metallicity Star Formation Survey of Sh2-284. I. Ordered Massive Star Formation in the Outer Galaxy Open
Star formation is a fundamental, yet poorly understood, process of the Universe. It is important to study how star formation occurs in different galactic environments. Thus, here, in the first of a series of papers, we introduce the Low-me…
View article: Micro-Mirror-Devices (MMDs): A New Family of MOEMS for the Habitable World Observatory
Micro-Mirror-Devices (MMDs): A New Family of MOEMS for the Habitable World Observatory Open
We present a new program aimed at developing a new generation of micromirror devices specifically tailored for astronomical applications, multi-slit spectroscopy in particular. We first overview the general characteristics of Multi-Object-…
View article: Unveiling Two Deeply Embedded Young Protostars in the S68N Class 0 Protostellar Core with JWST/NIRSpec
Unveiling Two Deeply Embedded Young Protostars in the S68N Class 0 Protostellar Core with JWST/NIRSpec Open
The near-infrared (NIR) emission of the youngest protostars still needs to be characterized to better understand the evolution of their accretion and ejection activity. We analyze James Webb Space Telescope NIRSpec 1.7–5.3 μ m observations…
View article: Low-Metallicity Star Formation Survey in Sh2-284 (LZ-STAR). II. The inital mass function
Low-Metallicity Star Formation Survey in Sh2-284 (LZ-STAR). II. The inital mass function Open
To fully understand the star formation process, we are compelled to study it in a variety of environments. Of particular interest are how star formation and the resulting initial mass function (IMF) vary as a function of metallicity. We ha…
View article: JWST/NIRCam Coronagraphic Search for Hidden Planets in the HD 163296 Protoplanetary Disk
JWST/NIRCam Coronagraphic Search for Hidden Planets in the HD 163296 Protoplanetary Disk Open
HD 163296 is a Herbig Ae/Be star with multiple signposts of ongoing planet formation on its disk, such as prominent rings and gaps, as well as kinematic features as identified by previous Atacama Large Millimeter/submillimeter Array (ALMA)…
View article: Identification of a Turnover in the Initial Mass Function of a Young Stellar Cluster Down to 0.5 <i>M</i> <sub>J</sub>
Identification of a Turnover in the Initial Mass Function of a Young Stellar Cluster Down to 0.5 <i>M</i> <sub>J</sub> Open
A successful theory of star formation should predict the number of objects as a function of their mass produced through star-forming events. Previous studies in star-forming regions and the solar neighborhood have identified a mass functio…
View article: Protoplanetary Disks around Sun-like Stars Appear to Live Longer When the Metallicity is Low*
Protoplanetary Disks around Sun-like Stars Appear to Live Longer When the Metallicity is Low* Open
Previous Hubble Space Telescope observations of the star-forming cluster NGC 346 in the Small Magellanic Cloud (SMC) revealed a large population of pre-main-sequence (PMS) candidates, characterized by H α excess emission in their photometr…
View article: EWOCS-III: JWST observations of the supermassive star cluster Westerlund 1
EWOCS-III: JWST observations of the supermassive star cluster Westerlund 1 Open
The typically large distances, extinction, and crowding of Galactic supermassive star clusters have so far hampered the identification of their very low mass members, required to extend our understanding of star and planet formation, and e…
View article: EWOCS-III: JWST observations of the supermassive star cluster Westerlund 1
EWOCS-III: JWST observations of the supermassive star cluster Westerlund 1 Open
Context . The typically large distances, extinction, and crowding of Galactic supermassive star clusters (stellar clusters more massive than 10 4 M ⊙ ) have so far hampered the identification of their very low mass members, required to ext…
View article: A tell-tale tracer for externally irradiated protoplanetary disks: Comparing the [C I] 8727 Å line and ALMA observations in proplyds
A tell-tale tracer for externally irradiated protoplanetary disks: Comparing the [C I] 8727 Å line and ALMA observations in proplyds Open
The evolution of protoplanetary disks in regions with massive OB stars is influenced by externally driven winds that deplete the outer parts of these disks. The winds have previously been studied via forbidden oxygen emission lines, which …
View article: Embedded Young Stellar Objects near H72.97-69.39: A Forming Super Star Cluster in N79
Embedded Young Stellar Objects near H72.97-69.39: A Forming Super Star Cluster in N79 Open
We present 102 embedded young stellar object (YSO) candidates associated with the H72.97-69.39 super star cluster (SSC) in the Large Magellanic Cloud (LMC). With the use of the James Webb Space Telescope Mid-Infrared Instrument (MIRI) imag…
View article: A tell-tale tracer for externally irradiated protoplanetary disks: comparing the [CI] 8727 A line and ALMA observations in proplyds
A tell-tale tracer for externally irradiated protoplanetary disks: comparing the [CI] 8727 A line and ALMA observations in proplyds Open
The evolution of protoplanetary disks in regions with massive OB stars is influenced by externally driven winds that deplete the outer parts of disks. These winds have previously been studied via forbidden oxygen emission lines, which also…
View article: Unveiling two deeply embedded young protostars in the S68N Class 0 protostellar core with JWST/NIRSpec
Unveiling two deeply embedded young protostars in the S68N Class 0 protostellar core with JWST/NIRSpec Open
The near-infrared (NIR) emission of the youngest protostars still needs to be characterized to better understand the evolution of their accretion and ejection activity. We analyze James Webb Space Telescope NIRSpec 1.7 -- 5.3 $μ$m observat…
View article: Identification of a turnover in the initial mass function of a young stellar cluster down to 0.5 MJ
Identification of a turnover in the initial mass function of a young stellar cluster down to 0.5 MJ Open
We present results exploring the initial mass function in a young (< 1 Myr) embedded star-forming region, NGC 2024, down to sub-Jupiter masses using the Near Infrared Camera (NIRCam) on the James Webb Space Telescope (JWST). Predominant st…
View article: Identification of a turnover in the initial mass function of a young stellar cluster down to 0.5 M$_{J}$
Identification of a turnover in the initial mass function of a young stellar cluster down to 0.5 M$_{J}$ Open
A successful theory of star formation should predict the number of objects as a function of their mass produced through star-forming events. Previous studies in star-forming regions and the solar neighborhood identify a mass function incre…
View article: EWOCS-II: X-ray properties of the Wolf–Rayet stars in the young Galactic super star cluster Westerlund 1
EWOCS-II: X-ray properties of the Wolf–Rayet stars in the young Galactic super star cluster Westerlund 1 Open
Context. Wolf–Rayet (WR) stars are massive evolved stars that exhibit particularly fast and dense stellar winds. Although they constitute a very short phase near the end of a massive star’s life, they play a crucial role in the evolution o…
View article: EWOCS-II: X-ray properties of the Wolf-Rayet stars in the young Galactic super star cluster Westerlund 1
EWOCS-II: X-ray properties of the Wolf-Rayet stars in the young Galactic super star cluster Westerlund 1 Open
We present the most comprehensive and deepest X-ray study to date of the properties of the richest Wolf-Rayet (WR) population observed in a single stellar cluster, Westerlund 1 (Wd1). This work is based on 36 Chandra observations obtained …
View article: Young Stellar Objects in NGC 346: A JWST NIRCam/MIRI Imaging Survey
Young Stellar Objects in NGC 346: A JWST NIRCam/MIRI Imaging Survey Open
We present a JWST imaging survey with NIRCam and MIRI of NGC 346, the brightest star-forming region in the Small Magellanic Cloud. By combining aperture and point-spread function photometry of 11 wavelength bands across these two instrumen…
View article: The TEMPO Survey II: Science Cases Leveraged from a Proposed 30-Day Time Domain Survey of the Orion Nebula with the Nancy Grace Roman Space Telescope
The TEMPO Survey II: Science Cases Leveraged from a Proposed 30-Day Time Domain Survey of the Orion Nebula with the Nancy Grace Roman Space Telescope Open
The TEMPO (Transiting Exosatellites, Moons, and Planets in Orion) Survey is a proposed 30-day observational campaign using the Nancy Grace Roman Space Telescope. By providing deep, high-resolution, short-cadence infrared photometry of a dy…
View article: PDRs4All
PDRs4All Open
Context. Mid-infrared emission features are important probes of the properties of ionized gas and hot or warm molecular gas, which are difficult to probe at other wavelengths. The Orion Bar photodissociation region (PDR) is a bright, nearb…
View article: HST Survey of the Orion Nebula Cluster in ACS/Visible and WFC3/IR Bands. IV. A Bayesian Multiwavelength Study of Stellar Parameters in the Orion Nebula Cluster
HST Survey of the Orion Nebula Cluster in ACS/Visible and WFC3/IR Bands. IV. A Bayesian Multiwavelength Study of Stellar Parameters in the Orion Nebula Cluster Open
We have performed a comprehensive study of the Orion Nebula Cluster (ONC) combining the photometric data obtained by the two Hubble Space Telescope Treasury programs that targeted this region. To consistently analyze the rich data set obta…
View article: Young Stellar Objects in NGC 346: A JWST NIRCam/MIRI Imaging Survey
Young Stellar Objects in NGC 346: A JWST NIRCam/MIRI Imaging Survey Open
We present a JWST imaging survey with NIRCam and MIRI of NGC 346, the brightest star-forming region in the Small Magellanic Cloud (SMC). By combining aperture and point spread function (PSF) photometry of eleven wavelength bands across the…
View article: Kaleidoscope of irradiated disks: MUSE observations of proplyds in the Orion Nebula Cluster
Kaleidoscope of irradiated disks: MUSE observations of proplyds in the Orion Nebula Cluster Open
In the Orion Nebula Cluster (ONC), protoplanetary disks exhibit ionized gas clouds in the form of a striking teardrop shape as massive stars irradiate the disk material. We present the first spatially and spectrally resolved observations o…
View article: PDRs4All VIII: Mid-IR emission line inventory of the Orion Bar
PDRs4All VIII: Mid-IR emission line inventory of the Orion Bar Open
Mid-infrared emission features probe the properties of ionized gas, and hot or warm molecular gas. The Orion Bar is a frequently studied photodissociation region (PDR) containing large amounts of gas under these conditions, and was observe…
View article: PDRs4All
PDRs4All Open
Context . JWST has taken the sharpest and most sensitive infrared (IR) spectral imaging observations ever of the Orion Bar photodis-sociation region (PDR), which is part of the nearest massive star-forming region the Orion Nebula, and ofte…