58 citations · 364 across the 36 of their papers we have counts for
24 papers · 1 filter
SPICY 30021: an embedded bona fide FUor with a mid-infrared precursor
Zhen Guo, Calum Morris, Vitor Fermiano +37
Unstable mass accretion in young stellar objects (YSOs) often leads to observable outbursts, which play a key role in stellar mass assembly during pre-main-sequence evolution. The…
A Multiwavelength View of Oph II: Disentangling the Variability of the Multi-Star Component C
Sean J. Gunderson, Walter W. Golay, Jackson Codd +8
We present a multiwavelength analysis of the star Oph C, covering X-ray, optical, near-infrared, and radio observations to test for the presence of interferometrically-detected…
Eta Carinae's historical light curve: evidence for cyclic Roche lobe overflow from the primary star
Augusto Damineli, Leonardo A. Almeida, Francisco J. Jablonski +5
The large amount of ground-based photometric measurements of Carinae obtained since 1940 have remained problematic for quantitative modeling due to the blending of flux from th…
The Triple System V1371 Tau: An Eclipsing Binary with an Outer Be Star
Danilo F. Rocha, Marcelo Emilio, Jonathan Labadie-Bartz +10
Although triple systems are common, their orbital dynamics and stellar evolution remain poorly understood. We investigated the V1371 Tau system using TESS photometry, multi-epoch s…
X-Raying a Be star disk: fundamental parameters of the eclipsing binary Be star V658 Car
Tajan H. de Amorim, Alex C. Carciofi, Jonathan Labadie-Bartz +8
With its two stellar eclipses and two disk attenuations per binary orbit, V658 Carinae stands out as the first clear eclipsing Be + sdOB system. This rare alignment offers a unique…
Benchmark brown dwarfs -- I. A blue M2 + T5 wide binary and a probable young [M4 + M4] + [T7 + T8] hierarchical quadruple
Z. H. Zhang, F. Navarete, M. C. Galvez-Ortiz +13
Benchmark brown dwarfs in wide binary systems are crucial for characterizing substellar objects and calibrating atmospheric and evolutionary models. However, brown dwarf benchmarks…
Visual Orbits of Wolf-Rayet Stars II: The Orbit of the Nitrogen-Rich WR Binary WR 138 measured with the CHARA Array
Amanda Holdsworth, Noel Richardson, Gail H. Schaefer +19
Classical Wolf-Rayet stars are descendants of massive OB-type stars that have lost their hydrogen-rich envelopes, and are in the final stages of stellar evolution, possibly explodi…
Early-Time Observations of SN 2023wrk: A Luminous Type Ia Supernova with Significant Unburned Carbon in the Outer Ejecta
Jialian Liu, Xiaofeng Wang, Cristina Andrade +44
We present extensive photometric and spectroscopic observations of the nearby Type Ia supernova (SN) 2023wrk at a distance of about 40 Mpc. The earliest detection of this SN can be…
Long-term evolution in ionization of ejecta illuminated by Eta Carinae
Augusto Damineli, Noel D. Richardson, Felipe Navarete +6
Changes in the flux and spectrum of Eta Carinae since 1900 have been attributed to the evolution of the central binary by some. Others suggest evolution in the occulting ejecta. Th…
VVV-WIT-12 and its fashionable nebula: a four year long period Young Stellar Object with a light echo?
Roberto K. Saito, Bringfried Stecklum, Dante Minniti +7
We report the serendipitous discovery of VVV-WIT-12, an unusual variable source that seems to induce variability in its surrounding nebula. The source belongs to the rare objects t…
The long-term spectral changes of eta Carinae: are they caused by a dissipating occulter as indicated by CMFGEN models?
A. Damineli, D. J. Hillier, F. Navarete +23
Eta Carinae (\,Car) exhibits a unique set of P Cygni profiles with both broad and narrow components. Over many decades, the spectrum has changed -- there has been an increase in…
Distance and age of the massive stellar cluster Westerlund 1. II. The eclipsing binary W36
Danilo F. Rocha, Leonardo A. Almeida, Augusto Damineli +3
Westerlund 1 (Wd 1) is one of the most relevant star clusters in the Milky Way to study massive star formation, although it is still poorly known. Here, we used photometric and spe…
Changes in the Na D Absorption Components of Carinae Provide Clues on the Location of the Dissipating Central Occulter
Connor S. Pickett, Noel D. Richardson, Theodore Gull +9
The Na D absorption doublet in the spectrum of Carinae is complex, with multiple absorption features associated with the Great Eruption (1840s), the Lesser Eruption (1890s), an…
Eta Carinae: an evolving view of the central binary, its interacting winds and its foreground ejecta
Theodore R. Gull, D. John Hillier, Henrik Hartman +13
FUV spectra of Eta Car, recorded across two decades with HST/STIS, document multiple changes in resonant lines caused by dissipating extinction in our line of sight. The FUV flux h…
Distance and age of the massive stellar cluster Westerlund 1. I. Parallax method using Gaia-EDR3
Felipe Navarete, Augusto Damineli, Aura E. Ramirez +2
Westerlund 1 (Wd 1) is one of the most massive young star clusters in the Milky Way. Although relevant for star formation and evolution, its fundamental parameters are not yet very…
Spectroscopic Signatures of the Vanishing Natural Coronagraph of eta Carinae
A. Damineli, F. Navarete, D. J. Hillier +7
Eta Carinae is a massive interacting binary system shrouded in a complex circumstellar environment whose evolution is the source of the long-term brightening observed during the la…
Principal component analysis tomography in near-infrared integral field spectroscopy of young stellar objects. I. Revisiting the high-mass protostar W33A
Felipe Navarete, Augusto Damineli, João E. Steiner +1
W33A is a well-known example of a high-mass young stellar object showing evidence of a circumstellar disc. We revisited the -band NIFS/Gemini North observations of the W33A prot…
Searching for active low-mass stars in CMa star-forming region: multi-band photometry with T80S
J. Gregorio-Hetem, F. Navarete, A. Hetem +10
An exotic environment surrounds the young stellar groups associated with the Canis Major (CMa) OB1/R1 region, which probably was formed under feedback from at least three supernova…
Sulphur-Bearing and Complex Organic Molecules in an Infrared Cold Core
Pedro P. B. Beaklini, Edgar Mendoza, Carla M. Canelo +9
Since the start of ALMA observatory operation, new and important chemistry of infrared cold core was revealed. Molecular transitions at millimeter range are being used to identify…
Gaia-DR2 distance to the W3 Complex in the Perseus Arm
Felipe Navarete, Phillip A. B. Galli, Augusto Damineli
The Perseus Arm is the closest Galactic spiral arm from the Sun, offering an excellent opportunity to study in detail its stellar population. However, its distance has been controv…
Distinguishing Circumstellar from Stellar Photometric Variability in Eta Carinae
Augusto Damineli, Eduardo Fernández-Lajús, Leonardo A. Almeida +14
The interacting binary Eta Carinae remains one of the most enigmatic massive stars in our Galaxy despite over four centuries of observations. In this work, its light curve from the…
Extinction law in the range 0.4-4.8 m and the 8620 DIB towards the stellar cluster Westerlund 1
Augusto Damineli, Leonardo A. Almeida, Robert D. Blum +4
The young stellar cluster Westerlund 1 (Wd 1: =339.6, b=0.4) is one of the most massive in the local Universe, but accurate parameters are pending on better d…
He II 4686 emission from the massive binary system in Car: constraints to the orbital elements and the nature of the periodic minima
M. Teodoro, A. Damineli, B. Heathcote +27
η Carinae is an extremely massive binary system in which rapid spectrum variations occur near periastron. Most notably, near periastron the He II line increases rapidly in…
A Survey of Extended H Emission from Massive YSOs
Felipe Navarete, Augusto Damineli, Cassio L. Barbosa +1
We present the results from a survey, designed to investigate the accretion process of massive young stellar objects (MYSOs) through near infrared narrow band imaging using the H$_…