Publications (47)
The Lexington Benchmarks for Numerical Simulations of Nebulae
G. Ferland, L. Binette, M. Contini +9
We present the results of a meeting on numerical simulations of ionized nebulae held at the University of Kentucky in conjunction with the celebration of the 70th birthdays of Prof…
Dust destruction in non-radiative shocks
H. Zhu, P. Slane, J. Raymond +1
Supernova remnant (SNR) shock waves are the main place where interstellar dust grains are destroyed. However, the dust destruction efficiency in non-radiative shocks is still not w…
A Spectroscopic Angle on Central Engine Size Scales in Accreting Neutron Stars
Nicolas Trueba, J. M. Miller, A. C. Fabian +9
Analyses of absorption from disk winds and atmospheres in accreting compact objects typically treat the central emitting regions in these systems as point sources relative to the a…
Suzaku Observations of the Black Hole H1743-322 in Outburst
J. L. Blum, J. M. Miller, E. Cackett +5
We observed the Galactic black hole candidate H1743-322 with Suzaku for approximately 32 ksec, while the source was in a low/hard state during its 2008 outburst. We collected and a…
Solar Eruptive Events (SEE) 2020 Mission Concept
R. P. Lin, A. Caspi, S. Krucker +20
Major solar eruptive events (SEEs), consisting of both a large flare and a near simultaneous large fast coronal mass ejection (CME), are the most powerful explosions and also the m…
Swift Spectroscopy of the Accretion Disk Wind in the Black Hole GRO J1655-40
M. Balakrishnan, J. M. Miller, N. Trueba +6
Chandra obtained two High Energy Transmission Grating (HETG) spectra of the stellar-mass black hole GRO J1655-40 during its 2005 outburst, revealing a rich and complex disk wind. S…
Solar magnetism eXplorer (SolmeX)
H. Peter, L. Abbo, V. Andretta +36
The magnetic field plays a pivotal role in many fields of Astrophysics. This is especially true for the physics of the solar atmosphere. Measuring the magnetic field in the upper s…
The magnetic nature of disk accretion onto black holes
J. M. Miller, J. Raymond, A. C. Fabian +5
Although disk accretion onto compact objects - white dwarfs, neutron stars, and black holes - is central to much of high energy astrophysics, the mechanisms which enable this proce…
The radio emission from radiative filaments of Cygnus Loop
D. UroÅ¡eviÄ, M. AndjeliÄ, M. D. FilipoviÄ +4
The Galactic supernova remnant (SNR) Cygnus Loop emerges as an ideal laboratory for analyzing the different radiation mechanisms, as well as the particle acceleration mechanisms at…
Hercules X-1: Empirical Models of UV Emission Lines
B. Boroson, T. Kallman, S. Vrtilek +4
The UV emission lines of Hercules X-1, resolved with the HST GHRS and STIS, can be divided into broad (FWHM 750 km/s) and narrow (FWHM 150 km/s) components. The broad lines can be…
Front-row seat of the recent R Aqr periastron passage: X-ray multi-epoch spectral and spatial analysis
A. Sacchi, M. Karovska, J. Raymond +7
We report on the X-ray spectral and spatial evolution of the Symbiotic star R Aqr. Through a multi-epoch observational campaign performed with Chandra between 2017 and 2022, we stu…
The Accretion Disk Wind in the Black Hole GRS 1915+105
J. M. Miller, J. Raymond, A. C. Fabian +7
We report on a 120 ks Chandra/HETG spectrum of the black hole GRS 1915+105. The observation was made during an extended and bright soft state in June, 2015. An extremely rich disk…
Initial Measurements of Black Hole Spin in GX 339-4 from Suzaku Spectroscopy
J. M. Miller, C. S. Reynolds, A. C. Fabian +6
We report on a deep Suzaku observation of the stellar-mass black hole GX 339-4 in outburst. A clear, strong, relativistically-shaped iron emission line from the inner accretion dis…
A Comprehensive Chandra Study of the Disk Wind in the Black Hole Candidate 4U 1630-472
Nicolas Trueba, J. M. Miller, J. Kaastra +4
The mechanisms that drive disk winds are a window into the physical processes that underlie the disk. Stellar-mass black holes are an ideal setting in which to explore these mechan…
Chandra Spectroscopy of MAXI J1305-704: Detection of an Infalling Black Hole Disk Wind?
J. M. Miller, J. Raymond, T. R. Kallman +9
We report on a Chandra/HETG X-ray spectrum of the black hole candidate MAXI J1305-704. A rich absorption complex is detected in the Fe L band, including density-sensitive lines fro…
First evidence of enhanced recombination in astrophysical environments and the implications for plasma diagnostics
A. Nemer, N. C. Sterling, J. Raymond +6
We report the first unambiguous observational evidence of Rydberg Enhanced Recombination (RER), a potentially important recombination mechanism that has hitherto been unexplored in…
Evidence of a Massive Stellar Disruption in the X-ray Spectrum of ASASSN-14li
J. M. Miller, B. Mockler, E. Ramirez-Ruiz +7
The proximity and duration of the tidal disruption event (TDE) ASASSN-14li led to the discovery of narrow, blue-shifted absorption lines in X-rays and UV. The gas seen in X-ray abs…
Optical and Near Infrared Study of the Cepheus E outflow, a very low excitation object
S. Ayala, A. Noriega-Crespo, P. M. Garnavich +4
We present images and spectra of the Cepheus E (Cep E) region at both optical and infrared wavelengths. Only the brightest region of the southern lobe of the Cep E outflow reveals…
An Obscured, Seyfert-2-like State of the Stellar-mass Black Hole GRS 1915+105 Caused by Failed Disk Winds
J. M. Miller, A. Zoghbi, J. Raymond +13
We report on Chandra gratings spectra of the stellar-mass black hole GRS 1915+105 obtained during a novel, highly obscured state. As the source entered this state, a dense, massive…
Extreme X-ray Reflection in the Nucleus of the Seyfert Galaxy NGC 5033
S. B. Yun, J. M. Miller, D. Barret +7
NGC 5033 is an intriguing Seyfert galaxy because its sub-classification may change with time, and because optical and sub-mm observations find that the massive black hole does not…
A Redshifted Inner Disk Atmosphere and Transient Absorbers in the Ultra-Compact Neutron Star X-ray Binary 4U 1916-053
Nicolas Trueba, J. M. Miller, A. C. Fabian +8
The very small accretion disks in ultra-compact X-ray binaries (UCXBs) are special laboratories in which to study disk accretion and outflows. We report on three sets of new (250 k…
On the Fe xxii Emission in the X-ray spectrum of NGC 1068
M. Z. Buhariwalla, J. M. Miller, L. C. Gallo +3
The Fe xxii doublet has been previously used to determine the density of collisionally ionized emission from magnetic cataclysmic variable stars. We test how this diagnostic double…
iPTF15eqv: Multi-wavelength Exposé of a Peculiar Calcium-rich Transient
D. Milisavljevic, D. Patnaude, J. Raymond +15
The progenitor systems of the class of "Ca-rich transients" is a key open issue in time domain astrophysics. These intriguing objects exhibit unusually strong calcium line emission…
Discovery of Kiloparsec Extended Hard X-ray Continuum and Fe K alpha from the Compton Thick AGN ESO428-G014
G. Fabbiano, M. Elvis, A. Paggi +5
We report the discovery of kpc-scale diffuse emission in both the hard continuum (3-6 keV) and in the Fe K alpha line in the Compton Thick (CT) Seyfert galaxy ESO428-G014. This ext…
The Accretion Disk Wind in the Black Hole GRO J1655-40
J. M. Miller, J. Raymond, C. S. Reynolds +3
We report on simultaneous Chandra/HETGS and RXTE observations of the transient stellar-mass black hole GRO J1655-40, made during its 2005 outburst. Chandra reveals a line-rich X-ra…
Metamorphosis of SN 2014C: Delayed Interaction Between a Hydrogen Poor Core-collapse Supernova and a Nearby Circumstellar Shell
D. Milisavljevic, R. Margutti, A. Kamble +19
We present optical observations of supernova SN 2014C, which underwent an unprecedented slow metamorphosis from H-poor type Ib to H-rich type IIn over the course of one year. The o…
Models of X-ray Photoionization in LMC X-4: Slices of a Stellar Wind
B. Boroson, T. Kallman, R. McCray +2
We show that the orbital variation in the UV P Cygni lines of the X-ray binary LMC X-4 results when X-rays photoionize nearly the entire region outside of the X-ray shadow of the n…
The nature of the broadband X-ray variability in the dwarf Seyfert galaxy NGC 4395
E. S. Kammoun, E. Nardini, A. Zoghbi +14
We present a flux-resolved X-ray analysis of the dwarf Seyfert 1.8 galaxy NGC 4395, based on three archival and one archival observations. The source is known…
Hopkins Ultraviolet Telescope Observations of Her X-1
B. Boroson, W. P. Blair, A. F. Davidsen +4
We have obtained a far-ultraviolet spectrum of the X-ray binary Hercules X-1/HZ Herculis using the Hopkins Ultraviolet Telescope aboard the Astro-1 space shuttle mission in 1990 De…
Powerful, Rotating Disk Winds from Stellar-mass Black Holes
J. M. Miller, A. C. Fabian, J. Kaastra +5
We present an analysis of ionized X-ray disk winds observed in the Fe K band of four stellar-mass black holes observed with Chandra, including 4U 1630-47, GRO J1655-40, H 1743-322,…
Chandra Observations of NGC 7212: Large-scale Extended Hard X-ray Emission
Mackenzie L. Jones, G. Fabbiano, Martin Elvis +5
Recent observations of nearby Compton thick (CT) active galactic nuclei (AGNs) with Chandra have resolved hard (>3 keV) X-ray emission extending out from the central supermassive b…
An Ultra-Fast X-ray Disk Wind in the Neutron Star Binary GX 340+0
J. M. Miller, J. Raymond, E. Cackett +2
We present a spectral analysis of a brief Chandra/HETG observation of the neutron star low-mass X-ray binary GX~340+0. The high-resolution spectrum reveals evidence of ionized abso…
The Astrobiology Primer: An Outline of General Knowledge - Version 1, 2006
L. J. Mix, J. C. Armstrong, A. M. Mandell +20
Astrobiology, the study of life as a planetary phenomenon, aims to understand the fundamental nature of life on earth and the possibility of life elsewhere. To achieve this goal, a…
The Disk-Wind-Jet Connection in the Black Hole H 1743-322
J. M. Miller, J. Raymond, A. C. Fabian +6
X-ray disk winds are detected in spectrally soft, disk-dominated phases of stellar-mass black hole outbursts. In contrast, compact, steady, relativistic jets are detected in spectr…
Science Objectives for an X-Ray Microcalorimeter Observing the Sun
J. Martin Laming, J. Adams, D. Alexander +57
We present the science case for a broadband X-ray imager with high-resolution spectroscopy, including simulations of X-ray spectral diagnostics of both active regions and solar fla…
X-raying Chemical Evolution and Galaxy Formation in The Antennae
G. Fabbiano, A. Baldi, A. R. King +6
We present the integrated 411 ks {\it Chandra} ACIS-S exposure of the Antennae galaxies (NGC 4038/39). Besides a rich population of point-like sources, this spectacular image revea…
Chandra/HETGS Spectroscopy of the Galactic Black Hole GX 339-4: A Relativistic Iron Line and Evidence for a Seyfert-like Warm Absorber
J. M. Miller, J. Raymond, A. C. Fabian +9
We observed the Galactic black hole GX 339-4 with the Chandra High Energy Transmission Grating Spectrometer (HETGS) for 75 ksec during the decline of its 2002-2003 outburst. The se…
Investigating the nature of absorption lines in the Chandra X-ray spectra of the neutron star binary 4U 1820-30
E. M. Cackett, J. M. Miller, J. Raymond +5
We use four Chandra gratings spectra of the neutron star low-mass X-ray binary 4U 1820-30 to better understand the nature of certain X-ray absorption lines in X-ray binaries, inclu…
Proper motion of Cygnus loop shock filaments
M. Vucetic, N. Milanovic, D. Urosevis +4
We determined shock speed in the Galactic supernova remnant Cygnus Loop, using proper motion of its optical filaments and the latest estimate for its distance. The proper motion wa…
A search for iron emission lines in the Chandra X-ray spectra of neutron star low-mass X-ray binaries
E. M. Cackett, J. M. Miller, J. Homan +6
While iron emission lines are well studied in black hole systems, both in X-ray binaries and Active Galactic Nuclei, there has been less of a focus on these lines in neutron star l…
The Inner Accretion Flow in the Resurgent Seyfert-1.2 AGN Mrk 817
J. M. Miller, Z. Zoghbi, M. T. Reynolds +10
Accretion disks and coronae around massive black holes have been studied extensively, and they are known to be coupled. Over a period of 30 years, however, the X-ray (coronal) flux…
Disk-Wind Connection During the Heartbeats of GRS 1915+105
Abderahmen Zoghbi, J. M. Miller, A. L. King +14
Disk and wind signatures are seen in the soft state of Galactic black holes, while the jet is seen in the hard state. Here we study the disk-wind connection in the class of va…
X-ray Structure between the Innermost Disk and Optical Broad Line Region in NGC 4151
J. M. Miller, E. Cackett, A. Zoghbi +9
We present an analysis of the narrow Fe K-alpha line in Chandra/HETGS observations of the Seyfert AGN, NGC 4151. The sensitivity and resolution afforded by the gratings reveal asym…
Unveiling the Physics of Core-Collapse Supernovae with the Line Emission Mapper: Observing Cassiopeia A
S. Orlando, M. Miceli, D. J. Patnaude +12
(Abridged) Core-collapse supernova remnants (SNRs) display complex morphologies and asymmetries, reflecting anisotropies from the explosion and early interactions with the circumst…
Simultaneous Chandra and RXTE Spectroscopy of the Microquasar H~1743-322: Clues to Disk Wind and Jet Formation from a Variable Ionized Outflow
J. M. Miller, J. Raymond, J. Homan +7
We observed the bright phase of the 2003 outburst of the Galactic black hole candidate H 1743-322 in X-rays simultaneously with Chandra and RXTE on four occasions. The Chandra/HETG…
Shockingly Bright Warm Carbon Monoxide Molecular Features in the Supernova Remnant Cassiopeia A Revealed by JWST
J. Rho, S. -H. Park, R. Arendt +36
We present JWST NIRCam (F356W and F444W filters) and MIRI (F770W) images and NIRSpec- IFU spectroscopy of the young supernova remnant Cassiopeia A (Cas A). We obtained the data as…
The high resolution X-ray spectrum of SNR 0506-68 using XMM-Newton
S. Broersen, J. Vink, J. Kaastra +1
Aims: We study the supernova remnant 0506-68 in order to obtain detailed information about, among other things, the ionisation state and age of the ionised plasma. Methods: Using t…