83 citations · 927 across the 38 of their papers we have counts for
40 papers
SPIRITS 19q: Dust Production by a Subsolar-metallicity Carbon-rich Wolf-Rayet Star in NGC 2403
Sam Rose, Ryan M. Lau, Jacob E. Jencson +20
We present JWST/NIRSpec IFU observations of SPIRITS 19q, the highly dust-producing carbon-rich (WC) binary candidate located in a subsolar-metallicity region of the nearby spiral g…
The Aromatic Infrared Bands around the Wolf-Rayet Binary WR140 Revealed by JWST
Kotomi Taniguchi, Ryan M. Lau, Takashi Onaka +12
We have analyzed the aromatic infrared bands (AIBs) in the 6-11.2 m range around the Wolf-Rayet binary WR140 (d=1.64 kpc) obtained with the James Webb Space Telescope (JWST) Mid…
Dynamic Imprints of Colliding-wind Dust Formation from WR140
Emma P. Lieb, Ryan M. Lau, Jennifer L. Hoffman +24
Carbon-rich Wolf-Rayet binaries are a prominent source of carbonaceous dust that contribute to the dust budget of galaxies. The "textbook" example of an episodic dust producing WR…
Eta Carinae left a curious ladder to climb
Theodore R. Gull, Henrik Hartman, Michael F. Corcoran +5
Eta Carinae underwent the Great Eruption in the 1840s and a Lesser Eruption in the 1890s. Its apparent spectrum, modified by intervening ejecta, the Homunculus and Little Homunculu…
A First Look with JWST Aperture Masking Interferometry (AMI): Resolving Circumstellar Dust around the Wolf-Rayet Binary WR 137 beyond the Rayleigh Limit
Ryan M. Lau, Matthew J. Hankins, Joel Sanchez-Bermudez +20
We present infrared aperture masking interferometry (AMI) observations of newly formed dust from the colliding winds of the massive binary system Wolf-Rayet (WR) 137 with JWST usin…
Eta Carinae: the dissipating occulter is an extended structure
Theodore R. Gull, Henrik Hartman, Mairan Teodoro +10
Previous STIS long-slit observations of Eta Carinae identified numerous absorption features in both the stellar spectrum, and in the adjacent nebular spectra, along our line-of-sig…
Nested Dust Shells around the Wolf-Rayet Binary WR 140 observed with JWST
Ryan M. Lau, Matthew J. Hankins, Yinuo Han +29
Massive colliding-wind binaries that host a Wolf-Rayet (WR) star present a potentially important source of dust and chemical enrichment in the interstellar medium (ISM). However, t…
NICER X-ray Observations of Eta Carinae During its Most Recent Periastron Passage
David Espinoza-Galeas, Michael Francis Corcoran, Kenji Hamaguchi +12
We report high-precision X-ray monitoring observations in the 0.4-10 keV band of the luminous, long-period colliding-wind binary Eta Carinae up to and through its most recent X-ray…
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…
CO, Water, and Possible Methanol in Eta Carinae Approaching Periastron
Patrick W. Morris, Steven B. Charnley, Michael Corcoran +12
In circumstellar gas, the complex organic molecule methanol has been found almost exclusively around young stellar objects, and is thus regarded as a signpost of recent star format…
Non-thermal X-rays from Colliding Wind Shock Acceleration in the Massive Binary Eta Carinae
Kenji Hamaguchi, Michael F. Corcoran, Julian M. Pittard +9
Cosmic-ray acceleration has been a long-standing mystery and despite more than a century of study, we still do not have a complete census of acceleration mechanisms. The collision…
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…
BRITE-Constellation reveals evidence for pulsations in the enigmatic binary Carinae
Noel D. Richardson, Herbert Pablo, Christiaan Sterken +15
Car is a massive, eccentric binary with a rich observational history. We obtained the first high-cadence, high-precision light curves with the BRITE-Constellation nanosatellite…
A Case Study in Astronomical 3-D Printing: The Mysterious Eta Carinae
Thomas I. Madura
3-D printing moves beyond interactive 3-D graphics and provides an excellent tool for both visual and tactile learners, since 3-D printing can now easily communicate complex geomet…
VLTI-AMBER velocity-resolved aperture-synthesis imaging of Eta Carinae with a spectral resolution of 12000. Studies of the primary star wind and innermost wind-wind collision
G. Weigelt, K. -H. Hofmann, D. Schertl +26
Context. The mass loss from massive stars is not understood well. Eta Car is a unique object for studying the massive stellar wind during the LBV phase. It is also an eccentric bin…
The fossil wind structures of Eta Carinae: changes across on 5.54-year cycle
Theodore R. Gull, Thomas I. Madura, Mairan Teodoro +11
Eta Carinae, the closest, active, massive binary containing a highly unstable LBV, exhibits expanding, compressed wind shells, seen in emission, that are spatially and spectrally r…
To and beyond! The He I absorption variability across the 2014.6 periastron passage of Carinae
Noel D. Richardson, Thomas I. Madura, Lucas St-Jean +11
We have monitored the massive binary star Carinae with the CTIO/SMARTS 1.5~m telescope and CHIRON spectrograph from the previous apastron passage of the system through the rece…
Modelling the Central Constant Emission X-ray component of eta Carinae
Christopher M. P. Russell, Michael F. Corcoran, Kenji Hamaguchi +3
The X-ray emission of Carinae shows multiple features at various spatial and temporal scales. The central constant emission (CCE) component is centred on the binary and arises…
Eta Carinae's Thermal X-ray Tail Measured with XMM-Newton and NuSTAR
Kenji Hamaguchi, Michael F. Corcoran, Theodore R. Gull +12
The evolved, massive highly eccentric binary system, eta Carinae, underwent a periastron passage in the summer of 2014. We obtained two coordinated X-ray observations with XMM-Newt…
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…
The X-ray Lightcurve of the Supermassive star eta Carinae, 1996--2014
M. F. Corcoran, K. Hamaguchi, J. K. Liburd +9
Eta Carinae is the nearest example of a supermassive, superluminous, unstable star. Mass loss from the system is critical in shaping its circumstellar medium and in determining its…
3D radiative transfer simulations of Eta Carinae's inner colliding winds - II: Ionization structure of helium at periastron
Nicola Clementel, Thomas I. Madura, Chael J. H. Kruip +1
Spectral observations of the massive colliding wind binary Eta Carinae show phase-dependent variations, in intensity and velocity, of numerous helium emission and absorption lines…
3D Printing Meets Computational Astrophysics: Deciphering the Structure of Eta Carinae's Inner Colliding Winds
Thomas I. Madura, Nicola Clementel, Theodore R. Gull +2
We present the first 3D prints of output from a supercomputer simulation of a complex astrophysical system, the colliding stellar winds in the massive (>120 M_Sun), highly eccentri…
3D radiative transfer simulations of Eta Carinae's inner colliding winds - I. Ionization structure of helium at apastron
Nicola Clementel, Thomas I. Madura, Chael Kruip +2
The highly eccentric binary system Eta Carinae shows numerous time-variable emission and absorption features. These observational signatures are the result of interactions between…