Carbon dust in the evolved born-again planetary nebulae A30 and A78

no code implementations • 25 Feb 2021 • J. A. Toalá, P. Jiménez-Hernández, J. B. Rodríguez-González, S. Estrada-Dorado, M. A. Guerrero, V. M. A. Gómez-González, G. Ramos-Larios, D. A. García-Hernández, H. Todt

Gas and dust masses for the born-again ejecta in A30 are estimated to be $M_\mathrm{gas}=(4. 41^{+0. 55}_{-0. 14})\times10^{-3}$ M$_\odot$ and $M_\mathrm{dust}=(3. 20^{+3. 21}_{-2. 06})\times10^{-3}$ M$_\odot$, which can be used to estimate a total ejected mass and mass-loss rate for the born-again event of $(7. 61^{+3. 76}_{-2. 20})\times10^{-3}$ M$_{\odot}$ and $\dot{M}=[5-60]\times10^{-5}$ M$_{\odot}$ yr$^{-1}$, respectively.

Astrophysics of Galaxies Solar and Stellar Astrophysics

X-ray observations of the nova shell IPHASX J210204.7+471015

no code implementations • 27 Jan 2021 • J. A. Toalá, G. Rubio, E. Santamaría, M. A. Guerrero, S. Estrada-Dorado, G. Ramos-Larios, L. Sabin

Time series analyses unveil the presence of two periods, the dominant with a period of $2. 9\pm0. 2$ hr, which might be attributed to the spin of the white dwarf, and a secondary of $4. 5\pm0. 6$ hr that is in line with the orbital period of the binary system derived from optical observations.

Time Series Analysis Solar and Stellar Astrophysics High Energy Astrophysical Phenomena