93 citations · 509 across the 27 of their papers we have counts for
16 papers · 1 filter
Intermediate- and high-resolution optical spectroscopy on the nascent planetary nebula Vy 2-2: Evidence of binary-star evolution
Roldán A. Cala, Luis F. Miranda, José F. Gómez +2
Planetary nebulae (PNe) tend to show spectacular non-spherical shapes whose origin is not fully understood. Crucial information about PNe formation can be obtained by studying thei…
A Keplerian disk with a four-arm spiral birthing an episodically accreting high-mass protostar
R. A. Burns, Y. Uno, N. Sakai +34
High-mass protostars (M 8 M) are thought to gain the majority of their mass via short, intense bursts of growth. This episodic accretion is thought to be faci…
Evolution of the outflow in the water fountain source IRAS 180432116
L. Uscanga, H. Imai, J. F. Gómez +5
We present the spectral and spatial evolution of HO masers associated with the water fountain source IRAS 180432116 found in the observations with the Nobeyama 45 m telescop…
Searching for nascent planetary nebulae: OHPNe candidates in the SPLASH survey
Roldán A. Cala, José F. Gómez, Luis F. Miranda +7
The evolution of asymptotic giant branch stars from the spherical symmetry into the diverse shapes of planetary nebulae (PNe) is a topic of intensive research. Young PNe provide a…
FLASHING: New high-velocity HO masers in IRAS 182860959
Hiroshi Imai, Yuri Uno, Daichi Maeyama +8
We discovered new high-velocity components of HO maser emission in one of the "water fountain" sources, IRAS~182860959, which has been monitored using the Nobeyama 45 m tele…
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…
ALMA imaging of the nascent planetary nebula IRAS 15103-5754
Jose F. Gomez, Gilles Niccolini, Olga Suarez +5
We present continuum and molecular line (CO, CO, HCO) observations carried out with the Atacama Large Millimeter/submillimeter Array toward the "water fountain" star IRA…
Interferometric confirmation of "water fountain" candidates
Jose F. Gomez, Olga Suarez, J. Ricardo Rizzo +4
Water fountain stars (WFs) are evolved objects with water masers tracing high-velocity jets (up to several hundreds of km s). They could represent one of the first manifesta…
A search for water maser emission from brown dwarfs and low-luminosity young stellar objects
Jose F. Gomez, Aina Palau, Lucero Uscanga +2
We present a survey for water maser emission toward a sample of 44 low-luminosity young objects, comprising (proto-)brown dwarfs, first hydrostatic cores (FHCs), and other young st…
Polarization properties of OH emission in planetary nebulae
Jose F. Gomez, Lucero Uscanga, James A. Green +3
We present interferometric, full-polarization observations of the four ground-state transitions of OH, toward five confirmed and one candidate OH-emitting planetary nebulae (OHPNe)…
Time-variable non-thermal emission in the planetary nebula IRAS 15103-5754
Olga Suarez, Jose F. Gomez, Philippe Bendjoya +6
The beginning of photoionization marks the transition between the post-Asymptotic Giant Branch (post-AGB) and planetary nebula (PN) phases of stars with masses < 8 M_sun. This crit…
The first "water fountain" collimated outflow in a planetary nebula
J. F. Gomez, O. Suarez, Ph. Bendjoya +8
"Water fountains" (WFs) are evolved objects showing high-velocity, collimated jets traced by water maser emission. Most of them are in the post-Asymptotic Giant Branch and they may…
ALMA sub-mm maser and dust distribution of VY Canis Majoris
A. M. S. Richards, C. M. V. Impellizzeri, E. M. Humphreys +25
Cool, evolved stars have copious, enriched winds. The structure of these winds and the way they are accelerated is not well known. We need to improve our understanding by studying…
HO maser emission associated with the planetary nebula IRAS 163334807
L. Uscanga, J. F. Gómez, L. F. Miranda +5
We present simultaneous observations of HO maser emission and radio continuum at 1.3 cm carried out with the Australia Telescope Compact Array towards two sources, IRAS 16333$-…
Modelling the 3D morphology and proper motions of the planetary nebula NGC 6302
L. Uscanga, P. F. Velázquez, A. Esquivel +3
We present 3D hydrodynamical simulations of an isotropic fast wind interacting with a previously ejected toroidally-shaped slow wind in order to model both the observed morphology…
An updated catalog of OH-maser-emitting planetary nebulae
L. Uscanga, J. F. Gómez, O. Suárez +1
Aims. We studied the characteristics of planetary nebulae (PNe) that show both OH maser and radio continuum emission (hereafter OHPNe). These have been proposed to be very young PN…