Outputs (9)

Hydrodynamic Predictions for the Next Outburst of T Coronae Borealis: It Will Be the Brightest Classical or Recurrent Nova Ever Observed in X-Rays * * R.M.W. took part in the observations and early simulations for this paper and we are grateful for his help. (2025)
Journal Article
Starrfield, S., Bose, M., Woodward, C. E., Iliadis, C., Hix, W. R., Evans, A., Shaw, G., Banerjee, D. P. K., Liimets, T., Page, K. L., Geballe, T. R., Ilyin, I., Perron, I., & Wagner, R. M. (in press). Hydrodynamic Predictions for the Next Outburst of T Coronae Borealis: It Will Be the Brightest Classical or Recurrent Nova Ever Observed in X-Rays * * R.M.W. took part in the observations and early simulations for this paper and we are grateful for his help. Astrophysical Journal, 982(2), 89. https://doi.org/10.3847/1538-4357/adb8ed

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 of a massive... Read More about Hydrodynamic Predictions for the Next Outburst of T Coronae Borealis: It Will Be the Brightest Classical or Recurrent Nova Ever Observed in X-Rays * * R.M.W. took part in the observations and early simulations for this paper and we are grateful for his help..

Near-infrared spectroscopy of the LMC recurrent nova LMCN 1968-12a (2024)
Journal Article
Evans, A., Banerjee, D. P. K., Geballe, T. R., Polin, A., Hsiao, E. Y., Page, K. L., Woodward, C. E., & Starrfield, S. (2024). Near-infrared spectroscopy of the LMC recurrent nova LMCN 1968-12a. Monthly Notices of the Royal Astronomical Society, 536(2), 1710-1717. https://doi.org/10.1093/mnras/stae2711

We have obtained near-infrared (0.80–2.45 $\, \mu$m) spectra of the recurrent nova LMCN 1968-12a on two occasions during its 2024 August eruption. This is the first near-infrared spectroscopy of an extragalactic nova. The initial spectrum, on day 8.4... Read More about Near-infrared spectroscopy of the LMC recurrent nova LMCN 1968-12a.

Pre-solar grains from novae and "Born-again giants" (2024)
Book Chapter
Evans, A., & Gehrz, R. (2024). Pre-solar grains from novae and "Born-again giants". In Presolar grains in extra-terrestrial materials. Elsevier

We review the properties of dust formed during classical nova eruptions and the Very Late Thermal Pulses (VLTPs) that occur during the later stages of post-Asymptotic Giant Branch evolution of low-mass stars. In both cases, carbon and hydrocarbon dus... Read More about Pre-solar grains from novae and "Born-again giants".

A Photoionization Model for the Infrared Coronal Line Emission in the Classical Nova V1716 Scorpii (2024)
Journal Article
Woodward, C. E., Shaw, G., Starrfield, S., Evans, A., & Page, K. L. (2024). A Photoionization Model for the Infrared Coronal Line Emission in the Classical Nova V1716 Scorpii. Astrophysical Journal, 968(1), Article 31. https://doi.org/10.3847/1538-4357/ad4097

A near-infrared spectrum of nova V1716 Scorpii (PNV J17224490-4137160), a recent bright ( Vmax=7.3 mag), Fermi-LAT detected γ-ray source, was modeled using the photoionization code CLOUDY. Abundances were estimated for He, C, N, O, Si, Al, Mg, Fe, Ne... Read More about A Photoionization Model for the Infrared Coronal Line Emission in the Classical Nova V1716 Scorpii.

A dusty rain falls on the nova V959 Monocerotis (2024)
Journal Article
Evans, A., Banerjee, D. P. K., Varricatt, W. P., & Joshi, V. (2024). A dusty rain falls on the nova V959 Monocerotis. Monthly Notices of the Royal Astronomical Society, 531(1), 728-738. https://doi.org/10.1093/mnras/stae1240

We present archival and ground-based infrared observations of the γ-ray-emitting nova V959 Mon, covering the period 100–4205 d after the 2012 eruption. We use these data to determine that the secondary in the nova system is a G5 main sequence star. D... Read More about A dusty rain falls on the nova V959 Monocerotis.

Snowflakes in a Furnace: Formation of CO and Dust in a Recurrent Nova Eruption (2023)
Journal Article
Banerjee, D. P. K., Woodward, C. E., Joshi, V., Evans, A., Walter, F. M., Marion, G. H., Hsiao, E. Y., Ashok, N. M., Gehrz, R. D., & Starrfield, S. (2023). Snowflakes in a Furnace: Formation of CO and Dust in a Recurrent Nova Eruption. Astrophysical Journal Letters, 954(1), Article L16. https://doi.org/10.3847/2041-8213/acf0c4

We report the detection of carbon monoxide (CO) and dust, formed under hostile conditions, in recurrent nova V745 Sco about 8.7 days after its 2014 outburst. The formation of molecules or dust has not been recorded previously in the ejecta of a recur... Read More about Snowflakes in a Furnace: Formation of CO and Dust in a Recurrent Nova Eruption.

Infrared spectroscopy of the 2022 eruption of the recurrent nova U Sco (2023)
Journal Article
Evans, A., Banerjee, D. P. K., Woodward, C. E., Geballe, T. R., Gehrz, R. D., Page, K. L., & Starrfield, S. (2023). Infrared spectroscopy of the 2022 eruption of the recurrent nova U Sco. Monthly Notices of the Royal Astronomical Society, 522(4), 4841-4851. https://doi.org/10.1093/mnras/stad1209

We present near-infrared spectroscopy of the 2022 eruption of the recurrent nova U Sco, over the period from 5.2 to 45.4 days after outburst. This is the most intensive infrared study of this nova. Our observations started early after the outburst an... Read More about Infrared spectroscopy of the 2022 eruption of the recurrent nova U Sco.

The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment (2022)
Journal Article
Kaminsky, B., Evans, A., Pavlenko, Y. V., Woodward, C. E., Banerjee, D. P. K., Gehrz, R. D., Walter, F., Starrfield, S., Ilyin, I., Strassmeier, K. G., & Wagner, R. M. (2022). The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment. Monthly Notices of the Royal Astronomical Society, 517(4), 6064-6076. https://doi.org/10.1093/mnras/stac2199

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 in Teff. Ther... Read More about The recurrent nova V3890 Sgr: a near-infrared and optical study of the red giant component and its environment.

X-ray powder diffraction study of the stability of clathrate hydrates in the presence of salts with relevance to the Martian cryosphere (2018)
Journal Article
Safi, E., Thompson, S. P., Evans, A., Day, S. J., Murray, C. A., Baker, A. R., Oliveira, J. M., & Van Loon, J. T. (2019). X-ray powder diffraction study of the stability of clathrate hydrates in the presence of salts with relevance to the Martian cryosphere. Geochimica et Cosmochimica Acta, 245, 304-315. https://doi.org/10.1016/j.gca.2018.10.034

Water on the present day Martian surface is thought to exist in two thermally distinct sub-surface reservoirs: as ice in the cryosphere and as groundwater located deeper in the crust. These sub-surface environments are thought to contain saline, rath... Read More about X-ray powder diffraction study of the stability of clathrate hydrates in the presence of salts with relevance to the Martian cryosphere.