Search Publications
The Gaia Data Release 1 parallaxes and the distance scale of Galactic planetary nebulae
Stanghellini, Letizia; Bucciarelli, Beatrice; Lattanzi, Mario G. +1 more
In this paper we gauge the potentiality of Gaia in the distance scale calibration of planetary nebulae (PNe) by assessing the impact of DR1 parallaxes of central stars of Galactic PNe (CSPNe) against known physical relations. For selected PNe targets with state-of-the-art data on angular sizes and fluxes, we derive the distance-dependent parameter…
Ultraviolet spectroscopy of symbiotic nova V1016 Cyg with IUE and HST
Sanad, M. R.
We present International Ultraviolet Explorer (IUE) & Hubble Space Telescope Space Telescope Imaging Spectrograph (HST STIS) observations of the symbiotic nova V1016 Cyg through the period 1978 - 2000. Four spectra at different times revealing the changes in line fluxes are presented. The outflow velocity of the emitting region was calculated …
Spectral behavior of the symbiotic nova AG Pegasi observed with IUE and HST
Sanad, M. R.; Bobrowsky, M.
Ultraviolet spectra from the International Ultraviolet Explorer (IUE) and from the Hubble Space Telescope (HST) of the symbiotic novae AG Peg during the period 1978-1996 are analyzed. Some spectra showing the modulations of spectral lines at different times are presented. We determined the reddening from the 2200 Å feature, finding that E(B-V) = 0…
Compact star forming galaxies as the progenitors of compact quiescent galaxies: Clustering result
Fang, Guanwen; Kong, Xu; Fan, Lulu +1 more
We present a measurement of the spatial clustering of massive compact galaxies at 1.2 ≤ z ≤ 3 in CANDELS/3D-HST fields. We obtain the correlation length for compact quiescent galaxies (cQGs) at z ∼ 1.6 of r0 = 7.1-2.6+2.3 h-1 Mpc and compact star forming galaxies (cSFGs) at z ∼ 2.5 of r0 = 7.7…