R. M. Wagner
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View article: Hydrodynamic Predictions for the Next Outburst of T Coronae Borealis: It Will Be the Brightest Classical or Recurrent Nova Ever Observed in X-Rays*
Hydrodynamic Predictions for the Next Outburst of T Coronae Borealis: It Will Be the Brightest Classical or Recurrent Nova Ever Observed in X-Rays* Open
T Coronae Borealis (TCrB) is a recurrent nova with recorded outbursts in 1866 and 1946 and possible outbursts in 1217 and 1787. It is predicted to explode again in 2025 or 2026 based on multiple observational studies. The system consists o…
View article: Hydrodynamic Simulations of Oxygen–Neon Classical Novae as Galactic <sup>7</sup>Li Producers and Potential Accretion-induced Collapse Progenitors*
Hydrodynamic Simulations of Oxygen–Neon Classical Novae as Galactic <sup>7</sup>Li Producers and Potential Accretion-induced Collapse Progenitors* Open
We report on studies of classical nova (CN) explosions where we follow the evolution of thermonuclear runaways (TNRs) on oxygen–neon (ONe) white dwarfs (WDs). Using NOVA, a 1D hydrodynamic computer code, we accrete solar matter until the T…
View article: Hydrodynamic Simulations of Oxygen-Neon Classical Novae as Galactic $^7$Li Producers and Potential Accretion Induced Collapse Progenitors
Hydrodynamic Simulations of Oxygen-Neon Classical Novae as Galactic $^7$Li Producers and Potential Accretion Induced Collapse Progenitors Open
We report on studies of Classical Nova (CN) explosions where we follow the evolution of thermonuclear runaways (TNRs) on oxygen-neon (ONe) white dwarfs (WDs). Using NOVA, a one-dimensional hydrodynamic computer code, we accrete Solar matte…
View article: V445 Puppis: Dustier than a Thousand Novae
V445 Puppis: Dustier than a Thousand Novae Open
V445 Puppis, the only known Galactic helium nova, is a unique test bed to verify supernova (SN) theories in the single-degenerate channel that involve a white dwarf (WD) accreting matter from a helium-rich donor. An estimate of the mass of…
View article: Hydrodynamic simulations of classical novae; CO and ONe white dwarfs are supernova ia progenitors
Hydrodynamic simulations of classical novae; CO and ONe white dwarfs are supernova ia progenitors Open
Cataclysmic Variables (CVs) and Symbiotic Binaries are close (or not so close) binary star systems which contain both a white dwarf (WD) primary and a larger cooler secondary star that typically fills its Roche Lobe. The cooler star is los…
View article: Carbon-oxygen and oxygen-neon classical novae are Galactic7Li producers
Carbon-oxygen and oxygen-neon classical novae are Galactic7Li producers Open
We report on studies of classical nova (CN) explosions where we follow the evolution of thermonuclear runaways (TNRs) on carbon oxygen (CO) and oxygen-neon (ONe) white dwarfs (WDs). Our simulations are guided by the results of multi-dimens…
View article: The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment
The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment Open
We present an analysis of the red giant component of the recurrent nova V3890 Sgr, using data obtained before and after its 2019 eruption. Its effective temperature is Teff = 3050 ± 200 K for log g = 0.7, although there are modest changes …
View article: V392 Persei: A <i>γ</i>-ray bright nova eruption from a known dwarf nova
V392 Persei: A <i>γ</i>-ray bright nova eruption from a known dwarf nova Open
V392 Persei is a known dwarf nova (DN) that underwent a classical nova eruption in 2018. Here we report ground-based optical, Swift UV and X-ray, and Fermi-LAT γ-ray observations following the eruption for almost three years. V392 Per is o…
View article: SOFIA/FORCAST Monitoring of the Dust Emission from R Aqr: Start of the Eclipse
SOFIA/FORCAST Monitoring of the Dust Emission from R Aqr: Start of the Eclipse Open
We present mid-infrared (mid-IR) spectra from our continued monitoring of R Aquarii, the nearest symbiotic Mira, using the Stratospheric Observatory for Infrared Astronomy (SOFIA). New photometric and spectroscipic data were obtained with …
View article: Near-infrared Studies of Nova V1674 Herculis: A Shocking Record Breaker
Near-infrared Studies of Nova V1674 Herculis: A Shocking Record Breaker Open
We present near-infrared spectroscopy of Nova Herculis 2021 (V1674 Her), obtained over the first 70 days of its evolution. This fastest nova on record displays a rich emission line spectrum, including strong coronal line emission with comp…
View article: Spectroscopy of the Proposed White Dwarf Pulsar ASASSN-V J205543.90+240033.5
Spectroscopy of the Proposed White Dwarf Pulsar ASASSN-V J205543.90+240033.5 Open
We obtained spectra of ASASSN-V J205543.90+240033.5 (J2055), a system that shows photometric variations similar to the white dwarf (WD) pulsar AR Scorpii. Our spectra display a continuum rising steeply toward the blue as well as an array o…
View article: The Infrared Evolution of Dust in V838 Monocerotis
The Infrared Evolution of Dust in V838 Monocerotis Open
Luminous Red Variables (LRVs) are most likely eruptions that are the outcome of stellar mergers. V838 Mon is one of the best-studied members of this class, representing an archetype for stellar mergers resulting from B-type stars. As resul…
View article: The Infrared Evolution of Dust in V838 Monocerotis
The Infrared Evolution of Dust in V838 Monocerotis Open
Luminous Red Variables are most likely eruptions that are the outcome of stellar mergers. V838 Mon is one of the best-studied members of this class, representing an archetype for stellar mergers resulting from B-type stars. As result of th…
View article: Searches after Gravitational Waves Using ARizona Observatories (SAGUARO): Observations and Analysis from Advanced LIGO/Virgo's Third Observing Run
Searches after Gravitational Waves Using ARizona Observatories (SAGUARO): Observations and Analysis from Advanced LIGO/Virgo's Third Observing Run Open
With the conclusion of the third observing run for Advanced LIGO/Virgo (O3), we present a detailed analysis of both triggered and serendipitous observations of 17 gravitational-wave (GW) events (7 triggered and 10 purely serendipitous) fro…
View article: Optical spectra of FO Aquarii during low and high accretion rates
Optical spectra of FO Aquarii during low and high accretion rates Open
Between 2016 May and 2018 September, the intermediate polar (IP) FO Aquarii exhibited two distinct low states and one failed low state. We present optical spectroscopy of FO Aquarii throughout this period, making this the first detailed st…
View article: Lithium in T Coronae Borealis
Lithium in T Coronae Borealis Open
T Coronae Borealis is a recurrent, symbiotic nova system currently in quiescence between its periodic ≈80 yr cycle of eruptions. Observations during inter-outburst epochs provide an opportunity to study properties of the accretion disk and…
View article: Benzyne in V4334 Sqr: A Quest for the Ring with SOFIA/EXES
Benzyne in V4334 Sqr: A Quest for the Ring with SOFIA/EXES Open
Large aromatic molecules are ubiquitous in both circumstellar and interstellar environments. Detection of small aromatic molecules, such as benzene (C 6 H 6 ) and benzyne (C 6 H 4 ), are rare in astrophysical environments. Detection of suc…
View article: Infrared Spectroscopy of the Recent Outburst in V1047 Cen (Nova Centauri 2005)
Infrared Spectroscopy of the Recent Outburst in V1047 Cen (Nova Centauri 2005) Open
Fourteen years after its eruption as a classical nova (CN), V1047 Cen (Nova Cen 2005) began an unusual re-brightening in 2019 April. The amplitude of the brightening suggests that this is a dwarf nova (DN) eruption in a CN system. Very few…
View article: Erratum: ALMA reveals the aftermath of a white dwarf–brown dwarf merger in CK Vulpeculae
Erratum: ALMA reveals the aftermath of a white dwarf–brown dwarf merger in CK Vulpeculae Open
This is an erratum for Eyres et al. (2018). In fig. 3(d) the direction of the offset axis was reversed. The corrected Fig. 1 included in this erratum corrects this. No other changes are necessary, and the direction of the position-velocity…
View article: Optical and X-ray correlations during the 2015 outburst of the black hole V404 Cyg
Optical and X-ray correlations during the 2015 outburst of the black hole V404 Cyg Open
We present a serendipitous multiwavelength campaign of optical photometry simultaneous with Integral X-ray monitoring of the 2015 outburst of the black hole V404 Cyg. Largeamplitude optical variability is generally correlated with X-rays, …
View article: ALMA reveals the aftermath of a white dwarf–brown dwarf merger in CK Vulpeculae
ALMA reveals the aftermath of a white dwarf–brown dwarf merger in CK Vulpeculae Open
We present Atacama Large Millimeter–Submillimeter Array (ALMA) observations of CK Vulpeculae which is identified with ‘Nova Vulpeculae 1670’. They trace obscuring dust in the inner regions of the associated nebulosity. The dust forms two c…
View article: The Temporal Development of Dust Formation and Destruction in Nova Sagittarii 2015#2 (V5668 SGR): A Panchromatic Study
The Temporal Development of Dust Formation and Destruction in Nova Sagittarii 2015#2 (V5668 SGR): A Panchromatic Study Open
We present 5–28 μ m SOFIA FORECAST spectroscopy complemented by panchromatic X-ray through infrared observations of the CO nova V5668 Sgr documenting the formation and destruction of dust during ∼500 days following outburst. Dust condensat…
View article: Breaking the Habit: The Peculiar 2016 Eruption of the Unique Recurrent Nova M31N 2008-12a
Breaking the Habit: The Peculiar 2016 Eruption of the Unique Recurrent Nova M31N 2008-12a Open
Since its discovery in 2008, the Andromeda galaxy nova M31N 2008-12a has been observed in eruption every single year. This unprecedented frequency indicates an extreme object, with a massive white dwarf and a high accretion rate, which is …
View article: A Detailed Observational Analysis of V1324 Sco, the Most Gamma-Ray-luminous Classical Nova to Date
A Detailed Observational Analysis of V1324 Sco, the Most Gamma-Ray-luminous Classical Nova to Date Open
It has recently been discovered that some, if not all, classical novae emit GeV gamma-rays during outburst, but the mechanisms involved in the production ofgamma-rays are still not well understood. We present here a comprehensive multiwave…
View article: The ASAS-SN Bright Supernova Catalog – II. 2015
The ASAS-SN Bright Supernova Catalog – II. 2015 Open
This manuscript presents information for all supernovae discovered by the\nAll-Sky Automated Survey for SuperNovae (ASAS-SN) during 2015, its second full\nyear of operations. The same information is presented for bright ($m_V\\leq17$),\nsp…
View article: A Comprehensive Observational Analysis of V1324 Sco, the Most Gamma-Ray Luminous Classical Nova to Date
A Comprehensive Observational Analysis of V1324 Sco, the Most Gamma-Ray Luminous Classical Nova to Date Open
It has recently been discovered that some, if not all, classical novae emit GeV gamma-rays during outburst, but the mechanics of this gamma-ray emission are still not well understood. We present here a comprehensive, multi-wavelength datas…
View article: Rise and fall of the dust shell of the classical nova V339 Delphini
Rise and fall of the dust shell of the classical nova V339 Delphini Open
We present infrared spectroscopy of the classical nova V339 Delphini, obtained over a $\\sim2$ year period. The infrared emission lines were initially symmetrical, with HWHM velocities of 525 km s$^{-1}$. In later ($t\\gtrsim77$days, where…
View article: Six months of multiwavelength follow-up of the tidal disruption candidate ASASSN-14li and implied TDE rates from ASAS-SN
Six months of multiwavelength follow-up of the tidal disruption candidate ASASSN-14li and implied TDE rates from ASAS-SN Open
We present ground-based and Swift photometric and spectroscopic observations of the candidate tidal disruption event (TDE) ASASSN-14li, found at the center of PGC043234 (d ' 90 Mpc) by the All-Sky Automated Survey for SuperNovae (ASAS-SN).…
View article: Massive stars exploding in a He-rich circumstellar medium – VII. The metamorphosis of ASASSN-15ed from a narrow line Type Ibn to a normal Type Ib Supernova
Massive stars exploding in a He-rich circumstellar medium – VII. The metamorphosis of ASASSN-15ed from a narrow line Type Ibn to a normal Type Ib Supernova Open
In this paper, we present the results of the spectroscopic and photometric monitoring campaign of ASASSN-15ed. The transient was discovered quite young by the All Sky Automated Survey for SuperNovae (ASAS-SN) survey. Amateur astronomers al…