10 citations · 32 across the 7 of their papers we have counts for
7 papers
X-Shooter view of planetary nebulae microstructures I: The case of NGC 7009 knots
L. Konstantinou, S. Akras, K. Bouvis +4
The properties of NGC 7009 knots are investigated by employing UV-to-near-infrared data from the X-Shooter spectrograph. These structures belong to the category of low-ionization s…
Mapping H-Excess Candidate Point Sources in the Southern Hemisphere Using S-PLUS Data
L. A. Gutiérrez-Soto, R. Lopes de Oliveira, S. Akras +18
Context. We use the Southern Photometric Local Universe Survey (S-PLUS) Fourth Data Release (DR4) to identify and classify H-excess point sources in the Southern Sky, combining…
Photometric redshifts for the S-PLUS Survey: is machine learning up to the task?
E. V. R. Lima, L. Sodré, C. R. Bom +14
The Southern Photometric Local Universe Survey (S-PLUS) is a novel project that aims to map the Southern Hemisphere using a twelve filter system, comprising five broad-band SDSS-li…
J-PLUS: Searching for very metal-poor star candidates using the SPEEM pipeline
Carlos Andrés Galarza, Simone Daflon, Vinicius M. Placco +25
We explore the stellar content of the Javalambre Photometric Local Universe Survey (J-PLUS) Data Release 2 and show its potential to identify low-metallicity stars using the Stella…
Multi-band polarimetry of post-asymptotic giant branch stars stars. Optical measurements
S. Akras, J. C. Ramirez Velez, N. Nanouris +4
We present new optical broad-band (UBVRI) aperture polarimetric observations of 53 post-asymptotic giant branch (AGB) stars selected to exhibit a large near-infrared excess. 24 out…
The bow-shock and high-speed jet in the faint, 40 arcmin diameter, outer halo of the evolved Helix planetary nebula (NGC 7293)
John Meaburn, Panos Boumis, Stavros Akras
In previous, very deep, optical images of NGC 7293 both a feature that has the morphology of a bow-shock and one with that of a jet were discovered in the faint 40 arcmin diameter…
A long trail behind the planetary nebula HFG1 (PK 136+05) and its precataclysmic binary central star V664 Cas
P. Boumis, J. Meaburn, M. Lloyd +1
A deep wide-field image in the light of the Halpha+[N II] emission lines, of the planetary nebula HFG1 which surrounds the precataclysmic binary system V664 Cas, has revealed a tai…