Zobrazeno 1 - 10
of 675
pro vyhledávání: '"Starrfield S."'
A near-infrared spectrum of nova V1716 Scorpii (PNV J17224490-4137160), a recent bright (V_max = 7.3 mag), Fermi-LAT detected gamma-ray source, was modeled using the photoionization code CLOUDY. Abundances were estimated for He, C, N, O, Si, Al, Mg,
Externí odkaz:
http://arxiv.org/abs/2404.12227
Autor:
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.
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
Externí odkaz:
http://arxiv.org/abs/2308.02871
Autor:
Banerjee, D. P. K., Evans, A., Woodward, C. E., Starrfield, S., Su, K. Y. L., Ashok, N. M., Wagner, R. M.
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 the helium
Externí odkaz:
http://arxiv.org/abs/2306.10565
Autor:
Evans, A., Banerjee, D. P. K., Woodward, C. E., R., T., Geballe, Gehrz, R. D., Page, K. L., Starrfield, S.
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
Externí odkaz:
http://arxiv.org/abs/2304.13508
High Resolution X-ray Spectra of RS Ophiuchi (2006 and 2021): Revealing the cause of SSS variability
Autor:
Ness, J. -U., Beardmore, A. P., Bode, M. F., Darnley, M. J., Dobrotka, A., Drake, J. J., Magdolen, J., Munari, U., Osborne, J. P., Orio, M., Page, K. L., Starrfield, S.
Publikováno v:
A&A 670, A131 (2023)
Swift observed the SSS phase in RS Oph much fainter in 2021 than in 2006, and we compare an XMM-Newton grating spectrum on day 55.6 in 2021 (2021d55.6) to SSS Chandra and XMM-Newton grating spectra from days 2006d39.7, 2006d54, and 2006d66.9. We pres
Externí odkaz:
http://arxiv.org/abs/2212.07169
Publikováno v:
Open Astronomy, Vol 21, Iss 1-2, Pp 76-87 (2012)
Symbiotic binaries are systems containing white dwarfs (WDs) and red giants. Symbiotic novae are those systems in which thermonuclear eruptions occur on the WD components. These are to be distinguished from events driven by accretion disk instabiliti
Externí odkaz:
https://doaj.org/article/751ea13884bf46448667cdbdca28c477
Publikováno v:
Open Astronomy, Vol 21, Iss 1-2, Pp 206-209 (2012)
We report on multiwavelength (from X-ray to optical) follow up observations of a carbon star CGCS 5926, motivated by the fact that it is positionally coincident with a faint X-ray source of the ROSAT catalog, thus suggesting its possible symbiotic X-
Externí odkaz:
https://doaj.org/article/d9c72b0f69404507b2b16059e6dfba61
Autor:
Evans, A., Geballe, T. R., Woodward, C. E., Banerjee, D. P. K., Gehrz, R. D., Starrfield, S., Shahbandeh, M.
We present infrared spectroscopy of the 2019 eruption of the recurrent nova V3890 Sgr, obtained over the period 5.1-46.3 days after the eruption. The spectrum of the red giant became more prominent as the flux declined, and by day 46.3 dominated the
Externí odkaz:
http://arxiv.org/abs/2208.09356
Autor:
Kaminsky, B., Evans, A., Pavlenko, Ya. V., Woodward, C. E., Banerjee, D. P. K., Gehrz, R. D., Walter, F., Starrfield, S., Ilyin, I., Strassmeier, K. G., Wagner, R. M.
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 $T_{\rm eff}=3050\pm$200 K for $\log{g}=0.7$, although there are modest changes in
Externí odkaz:
http://arxiv.org/abs/2207.14721
Autor:
Murphy-Glaysher, F. J., Darnley, M. J., Harvey, É. J., Newsam, A. M., Page, K. L., Starrfield, S., Wagner, R. M., Woodward, C. E., Terndrup, D. M., Kafka, S., Heras, T. Arranz, Berardi, P., Bertrand, E., Biernikowicz, R., Boussin, C., Boyd, D., Buchet, Y., Bundas, M., Coulter, D., Dejean, D., Diepvens, A., Dvorak, S., Edlin, J., Eenmae, T., Eggenstein, H., Fournier, R., Garde, O., Gout, J., Janzen, D., Jordanov, P., Kiiskinen, H., Lane, D., Larochelle, R., Leadbeater, R., Mankel, D., Martineau, G., Miller, I., Modic, R., Montier, J., Aimar, M. Morales, Muyllaert, E., Nogues, R. Naves, O'Keeffe, D., Oksanen, A., Pyatnytskyy, M., Rast, R., Rodgers, B., Perez, D. Rodriguez, Schorr, F., Schwendeman, E., Shadick, S., Sharpe, S., Alfaro, F. Soldán, Sove, T., Stone, G., Tordai, T., Venne, R., Vollmann, W., Vrastak, M., Wenzel, K.
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 \gamma-ray observations following the eruption for almost three years. V392 Per is one of
Externí odkaz:
http://arxiv.org/abs/2206.03443