165 citations · 1.2k across the 77 of their papers we have counts for
8 papers · 1 filter
Measuring the Expansion and Age of the Nova Shell IPHASXJ210204.7+471015
E. Santamaría, M. A. Guerrero, G. Ramos-Larios +4
The parallax expansion and kinematics of a nova shell can be used to assess its age and distance, and to investigate the interaction of the ejecta with the circumstellar medium. Th…
Rapidly-evolving episodic outflow in IRAS 18113-2503: clues to the ejection mechanism of the fastest water fountain
Gabor Orosz, Jose F. Gomez, Hiroshi Imai +11
Water fountains are evolved stars showing early stages of collimated mass loss during transition from the asymptotic giant branch, providing valuable insight into the formation of…
The inside-out planetary nebula around a born-again star
Martin A. Guerrero, Xuan Fang, Marcelo M. Miller Bertolami +8
Planetary nebulae are ionized clouds of gas formed by the hydrogen-rich envelopes of low- and intermediate-mass stars ejected at late evolutionary stages. The strong UV flux from t…
The extended HeII4686 emission in the extremely metal-poor galaxy SBS0335-052E seen with MUSE
C. Kehrig, J. M. Vilchez, M. A. Guerrero +4
SBS0335-052E, one of the most metal-poor (Z ~ 3-4% Z) HeII-emitter starbursts known in the nearby universe, is studied using optical VLT/MUSE spectroscopic and Chandra X-…
Extended Structures of Planetary Nebulae Detected in H Emission
Xuan Fang, Yong Zhang, Sun Kwok +4
We present narrow-band near-infrared images of a sample of 11 Galactic planetary nebulae (PNe) obtained in the molecular hydrogen (H) 2.122 m and Br 2.166 m emission…
FastChem: A computer program for efficient complex chemical equilibrium calculations in the neutral/ionized gas phase with applications to stellar and planetary atmospheres
J. W. Stock, D. Kitzmann, A. B. C. Patzer +1
For the calculation of complex neutral/ionized gas phase chemical equilibria, we present a semi-analytical versatile and efficient computer program, called FastChem. The applied me…