25 citations · 115 across the 19 of their papers we have counts for
23 papers
Tracing star formation across the Rosette nebula using deep Spitzer imaging
Daniel Capela, Aleks Scholz, Koraljka Muzic +4
We present a deep large-scale infrared survey of young stellar objects in the Rosette Nebula. Our analysis is based on stacked archival Spitzer/IRAC images. The images have been tr…
EWOCS-IX: JWST/NIRCam observations of Westerlund 2 - Identification of candidate substellar members
V. Almendros-Abad, M. G. Guarcello, K. Muzic +26
[Abridged] Investigating substellar populations in young massive clusters offers crucial insights into the formation of brown dwarfs (BDs) and the role of environmental conditions…
X-shooter survey Across Regions and Ages to probe Disk Evolution (ARADE): Accretion properties in Orion A and their relation with disk masses
Lara Piscarreta, Giacomo Beccari, Carlo Manara +10
We present a homogeneous VLT/X-Shooter study of accretion in young stellar objects spanning the entire Orion A complex. Our sample includes 91 pre-main-sequence stars hosting a pro…
EWOCS-VIII: Internal kinematics and expansion of Westerlund 1 from VVVX proper motions
C. Ordenes-Huanca, A. Bayo, M. Guarcello +12
Westerlund 1 (Wd1) is the most massive young star cluster known in the Milky Way and a key laboratory for studying the early dynamical evolution of massive clusters. Owing to its h…
EWOCS-VI: Probing the hidden intermediate-mass population of Westerlund 1
C. Ordenes-Huanca, A. Bayo, M. Guarcello +11
Context: Westerlund 1 (Wd1), the most massive young star cluster in the Milky Way, is an excellent laboratory for studying star formation and early stellar evolution in a starburst…
Substellar population of the young massive cluster RCW 36 in Vela
A. R. G. do Brito do Vale, K. Mužić, H. Bouy +10
The initial mass function (IMF) is a cornerstone of star formation studies, yet its universality remains debated. We investigate the IMF in the young massive cluster RCW 36, locate…
Discovery of an Accretion Burst in a Free-Floating Planetary-Mass Object
V. Almendros-Abad, A. Scholz, B. Damian +7
We report the discovery of a long-lasting burst of disk accretion in Cha J11070768-7626326 (Cha 1107-7626), a young, isolated, 5-10 M object. In spectra taken…
Internal dynamics and structure of Cepheus OB4. The asymmetric expansion of Berkeley 59
Bruno Wiesneth, Koraljka Muzic, Victor Almendros-Abad
Accurate measurements of young stellar cluster internal dynamics provide crucial insights into their formation. With Gaia, we are now able to trace stellar motions and study the dy…
The substellar population in Corona Australis
Koraljka Muzic, Víctor Almendros-Abad, André Baptista +7
The substellar initial mass function (IMF) and the formation mechanisms of brown dwarfs (BDs) remain key open questions in star formation theory. IMF characterization in a large nu…
Spectroscopy of Free-Floating Planetary-Mass Objects and their disks with JWST
Belinda Damian, Aleks Scholz, Ray Jayawardhana +6
Free-floating planetary-mass objects (FFPMOs) are known to harbor disks at young ages. Here, we present 1-13 spectra for eight young FFPMOs with masses of 5-10 M$_\mathrm{Jup}…
Detection of Hydrocarbons in the Disk around an Actively-Accreting Planetary-Mass Object
Laura Flagg, Aleks Scholz, V. Almendros-Abad +6
We present the 0.6--12-micron spectrum of Cha\,1107-7626, a 6-10 Jupiter-mass free-floating object in the 2\,Myr-old Chamaeleon-I star-forming region, from observations with…
EWOCS-III: JWST observations of the supermassive star cluster Westerlund 1
M. G. Guarcello, V. Almendros-Abad, J. B. Lovell +29
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 e…
Spectral characterization of young LT dwarfs
L. Piscarreta, K. Mužić, V. Almendros-Abad +1
We aim to provide a detailed characterization of near-infrared spectra for young LT brown dwarfs, including robust spectral typing, calibrating spectral indices, identifying possib…
Evolution of the relation between the mass accretion rate and the stellar and disk mass from brown dwarfs to stars
V. Almendros-Abad, C. F. Manara, L. Testi +7
The time evolution of the dependence of the mass accretion rate with the stellar mass and the disk mass represents a fundamental way to understand the evolution of protoplanetary d…
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Westerlund 1 and 2 Open Clusters Survey
M. G. Guarcello, E. Flaccomio, J. F. Albacete-Colombo +48
Context. With a mass exceeding several 10^4 solar masses and a rich and dense population of massive stars, supermassive young star clusters represent the most massive star-forming…
Variability in SSTc2d J163134.1-240100, a brown dwarf with quasi-spherical mass loss
Aleks Scholz, Koraljka Muzic, Victor Almendros-Abad +4
We report on a search for variability in the young brown dwarf SST1624 (~M7 spectral type, M~0.05Msol), previously found to feature an expanding gaseous shell and to undergo quasi-…
Spectroscopic substellar initial mass function of NGC 2244
V. Almendros-Abad, K. Mužić, H. Bouy +10
We aim at characterizing the low-mass (sub)stellar population of the central portion (2.4 pc) of the 2 Myr old cluster NGC 2244 using near infrared spectroscopy. By study…
Disks around young planetary-mass objects: Ultradeep Spitzer imaging of NGC1333
Aleks Scholz, Koraljka Muzic, Ray Jayawardhana +2
We report on a sensitive infrared search for disks around isolated young planetary-mass objects (PMOs) in the NGC1333 cluster, by stacking 70 Spitzer/IRAC frames at 3.6 and 4.5$\,μ…
Stellar population of the Rosette Nebula and NGC 2244: application of the probabilistic random forest
Koraljka Muzic, Victor Almendros-Abad, Herve Bouy +5
(Abridged) In this work, we study the 2.8x2.6 deg2 region in the emblematic Rosette Nebula, centred at the young cluster NGC 2244, with the aim of constructing the most reliable ca…
Discovery of a brown dwarf with quasi-spherical mass-loss
Dary A. Ruíz-Rodríguez, Lucas A. Cieza, Simon Casassus +14
We report the serendipitous discovery of an elliptical shell of CO associated with the faint stellar object SSTc2d J163134.1-24006 as part of the "Ophiuchus Disk Survey Employing A…
Youth analysis of near infrared spectra of young low-mass stars and brown dwarfs
V. Almendros-Abad, K. Mužić, A. Moitinho +2
We aim at building a method that efficiently identifies young low-mass stars and brown dwarfs from low-resolution near-infrared spectra, by studying gravity-sensitive features and…
The first spectroscopically confirmed brown dwarfs in NGC 2264
Samuel Pearson, Aleks Scholz, Paula S Teixeira +2
We present spectroscopic follow-up observations of 68 red, faint candidates from our multi-epoch, multi-wavelength, previously published survey of NGC 2264. Using near-infrared spe…
New low-mass members of Chamaeleon I and Cha
K. Kubiak, K. Mužić, I. Sousa +3
The goal of this paper is to increase the membership list of the Chamaeleon star forming region and the Cha moving group, in particular for low-mass stars and substellar object…