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Young Stellar Objects in NGC 346: A JWST NIRCam/MIRI Imaging Survey
Nolan Habel, Conor Nally, Laura Lenkic +17
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 func…
Deep JWST/NIRCam imaging of Supernova 1987A
Mikako Matsuura, M. Boyer, Richard G. Arendt +46
JWST/NIRCam obtained high angular-resolution (0.05-0.1''), deep near-infrared 1--5 micron imaging of Supernova (SN) 1987A taken 35 years after the explosion. In the NIRCam images,…
Determining stellar accretion rates from and emission lines with JWST NIRSpec
Ciaràn Rogers, Guido de Marchi, Bernhard Brandl
In this letter we present the first systematic spectroscopic measurements of the Near-InfraRed (NIR) hydrogen recombination lines Paschen alpha ( ) and Brackett…
JWST NIRCam Observations of SN 1987A: Spitzer Comparison and Spectral Decomposition
Richard G. Arendt, Martha L. Boyer, Eli Dwek +24
JWST NIRCam observations at 1.5-4.5 m have provided broad and narrow band imaging of the evolving remnant of SN 1987A with unparalleled sensitivity and spatial resolution. Compa…
Quantifying the contamination from nebular emission in NIRSpec spectra of massive star forming regions
Ciaran R. Rogers, Guido De Marchi, Giovanna Giardino +3
The Near InfraRed Spectrograph (NIRSpec) on the James Webb Space Telescope (JWST) includes a novel micro shutter array (MSA) to perform multi object spectroscopy. While the MSA is…
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…
Pre-main Sequence stars in LH91
R. Carini, K. Biazzo, G. De Marchi +3
We study the accretion properties of pre-main sequence low-mass stars in the LH 91 association within the Large Magellanic Clouds. Using optical multiband photometry obtained with…
Hubble Tarantula Treasury Project V. The star cluster Hodge 301: the old face of 30 Doradus
M. Cignoni, E. Sabbi, R. P. van der Marel +10
Based on color-magnitude diagrams (CMDs) from the Hubble Space Telescope Hubble Tarantula Treasury Project (HTTP) survey, we present the star formation history (SFH) of Hodge~301,…
Hubble Tarantula Treasury Project. IV. The extinction law
Guido De Marchi, Nino Panagia, Elena Sabbi +10
We report on the study of interstellar extinction across the Tarantula nebula (30 Doradus), in the Large Magellanic Cloud, using observations from the Hubble Tarantula Treasury Pro…
Do you know the extinction in your young massive cluster?
Guido De Marchi, Nino Panagia, Elena Sabbi
Up to ages of ~100 Myr, massive clusters are still swamped in large amounts of gas and dust, with considerable and uneven levels of extinction. At the same time, large grains (ices…
Star formation in the Local Group as seen by low-mass stars
Guido De Marchi, Nino Panagia
We have undertaken a systematic study of pre-main sequence (PMS) stars spanning a wide range of masses (0.5 - 4 Msolar), metallicities (0.1 - 1 Zsolar) and ages (0.5 - 30 Myr). We…
Hubble Tarantula Treasury Project: Unraveling Tarantula's Web. II. Optical and Near Infrared Star Formation History of the Starburst Cluster NGC 2070 in 30 Doradus
M. Cignoni, E. Sabbi, R. P. van der Marel +10
We present a study of the recent star formation of 30 Doradus in the Large Magellanic Cloud (LMC) using the panchromatic imaging survey Hubble Tarantula Treasury Project (HTTP). In…
Mass accretion rates from multi-band photometry in the Carina Nebula: the case of Trumpler 14
G. Beccari, G. DeMarchi, N. Panagia +5
We present a study of the mass accretion rates of pre-Main Sequence (PMS) stars in the cluster Trumpler 14 (Tr14) in the Carina Nebula. Using optical multi-band photometry we were…
The extinction law inside the 30 Doradus nebula
Guido De Marchi, Nino Panagia
We have studied the interstellar extinction in a field of ~3' x 3' at the core of the 30 Doradus nebula, including the central R136 cluster, in the Large Magellanic Cloud. Observat…
Probing interstellar extinction near the 30 Doradus nebula with red giant stars
Guido De Marchi, Nino Panagia, Leo Girardi
We have studied the interstellar extinction in a field of 3' x 3' located about 6' SW of 30 Doradus in the Large Magellanic Cloud (LMC). Hubble Space Telescope observations in the…
Hα photometry of low mass stars in 47 Tucanae: chromospheric activity and exotica
G. Beccari, G. De Marchi, N. Panagia +1
We have used archival Hubble Space Telescope observations obtained with the Advanced Camera for Surveys to study the Hα emission properties of main sequence stars in the globular c…
The state of globular clusters at birth: emergence from the gas-embedded phase
Nathan W. C. Leigh, Mirek Giersz, Jeremy J. Webb +4
In this paper, we discuss the origin of the observed correlation between cluster concentration c and present-day mass function (PDMF) slope α reported by De Marchi, Paresce & Pulon…
Pre-main sequence stars older than 8 Myr in the Eagle Nebula
Guido De Marchi, Nino Panagia, M. G. Guarcello +1
Attention is given to a population of 110 stars in the NGC 6611 cluster of the Eagle Nebula that have prominent near-infrared (NIR) excess and optical colours typical of pre-main s…
Photometric determination of the mass accretion rate of pre-main sequence stars. IV. Recent star formation in NGC 602
Guido De Marchi, Giacomo Beccari, Nino Panagia
We have studied the young stellar populations in NGC 602, in the Small Magellanic Cloud, using a novel method that we have developed to combine Hubble Space Telescope photometry in…
Accurate determination of accretion and photospheric parameters in Young Stellar Objects: the case of two candidate old disks in the Orion Nebula Cluster
C. F. Manara, G. Beccari, N. Da Rio +5
Current planet formation models are largely based on the observational constraint that protoplanetary disks have lifetime 3Myr. Recent studies, however, report the existence of PMS…
Quantifying the Universality of the Stellar Initial Mass Function in Old Star Clusters
Nathan Leigh, Stefan Umbreit, Alison Sills +4
We present a new technique to quantify cluster-to-cluster variations in the observed present-day stellar mass functions of a large sample of star clusters. Our method quantifies th…
Photometric determination of the mass accretion rates of pre-main sequence stars. III. Results in the Large Magellanic Cloud
L. Spezzi, G. De Marchi, N. Panagia +2
We present a multi-wavelength study of three star forming regions, spanning the age range 1-14 Myr, located between the 30 Doradus complex and supernova SN1987A in the Large Magell…
The non-segregated population of blue straggler stars in the remote globular cluster Palomar 14
Giacomo Beccari, Antonio Sollima, Francesco R. Ferraro +5
We used deep wide-field observations obtained with the Canada-France-Hawaii Telescope to study the blue straggler star (BSS) population in the innermost five arcminutes of the remo…
Clues to the star formation in NGC 346 across time and space
Guido De Marchi, Nino Panagia, Elena Sabbi
We have studied the properties of the stellar populations in the field of the NGC 346 cluster in the Small Magellanic Cloud, using the results of a novel self-consistent method tha…