Zobrazeno 1 - 10
of 266
pro vyhledávání: '"Miranda, L. F."'
(Abridged) We present narrow-band images in several emission lines, and high- and intermediate-resolution long-slit spectra of Me2-1 to investigate its morphology and 3D structure, its physical parameters and chemical abundances. We identified in Me2
Externí odkaz:
http://arxiv.org/abs/2405.02938
Autor:
Miranda, L. F., Suárez, O., Olguín, L., Vázquez, R., Sabin, L., Guillén, P. F., Gómez, J. F., Uscanga, L., García-Lario, P., de Gregorio-Monsalvo, I., Aller, A., Manchado, A., Boumis, P., Riesgo, H., Matías, J. M.
Water maser emitting planetary nebulae (H$_2$O-PNe) are believed to be among the youngest PNe. We present new optical narrow- and broad-band images, intermediate- and high-resolution long-slit spectra, and archival optical images of the H$_2$O-PN IRA
Externí odkaz:
http://arxiv.org/abs/2105.05186
We report the discovery of a new emission-line object, named SPH4-South = (GAIA EDR3 5616553300192230272), towards the dark cloud LDN 1667. This object came to our attention after inspecting public images that show a faint diffuse nebula a few arcsec
Externí odkaz:
http://arxiv.org/abs/2105.02219
Autor:
Rechy-García, J. S., Guerrero, M. A., Santamaría, E., Gómez-González, V. M. A., Ramos-Larios, G., Toalá, J. A., Cazzoli, S., Sabin, L., Miranda, L. F., Fang, X., Liu, J.
HuBi 1 has been proposed to be member of the rare class of born-again planetary nebulae (PNe), i.e., its central star experienced a very late thermal pulse and ejected highly-processed material at high speeds inside the old hydrogen-rich PN. In this
Externí odkaz:
http://arxiv.org/abs/2009.13575
Autor:
Rechy-García, J. S., Guerrero, M. A., Puertas, S. Duarte, Chu, Y. -H., Toalá, J. A., Miranda, L. F.
A significant fraction of planetary nebulae (PNe) exhibit collimated outflows, distinct narrow kinematical components with notable velocity shifts with respect to the main nebular shells typically associated with low-ionization compact knots and line
Externí odkaz:
http://arxiv.org/abs/1911.11325
Publikováno v:
A&A 635, A128 (2020)
It is now clear that binarity plays a crucial role in many aspects of planetary nebulae (PNe), particularly the striking morphologies they exhibit. To date, there are ~60 known bCSPNe. However, both theory and observation indicates that this represen
Externí odkaz:
http://arxiv.org/abs/1911.09991
Autor:
Aller, A., Lillo-Box, J., Vučković, M., Van Winckel, H., Jones, D., Montesinos, B., Zorotovic, M., Miranda, L. F.
LoTr 5 is a planetary nebula with an unusual long-period binary central star. As far as we know, the pair consists of a rapidly rotating G-type star and a hot star, which is responsible for the ionization of the nebula. The rotation period of the G-t
Externí odkaz:
http://arxiv.org/abs/1801.06032
We present narrow-, broad-band, and WISE archive images, and high- and intermediate-resolution long-slit spectra of K 4-37, a planetary nebula that has never been analyzed in detail. Although K 4-37 appears bipolar, the morphokinematical analysis dis
Externí odkaz:
http://arxiv.org/abs/1612.03107
RWT 152 is one of the few known planetary nebulae with an sdO central star. We present subarcsecond red tunable filter Halpha imaging and intermediate-resolution, long-slit spectroscopy of RWT 152 obtained with OSIRIS/GTC with the goal of analyzing i
Externí odkaz:
http://arxiv.org/abs/1608.01258
Yellow symbiotic stars are useful targets to probe whether mass transfer has happened in these binary systems. However, the number of known yellow symbiotic stars is very scarce. We report spectroscopic observations of five candidate yellow symbiotic
Externí odkaz:
http://arxiv.org/abs/1602.02189