3 papers
SDSS-V LVM: Revealing the Physical and Chemical Structure of the Helix Nebula
R. Orozco-Duarte, J. E. Méndez-Delgado, J. A. Toalá +27
We present the first spatially contiguous study of the physical and chemical structure of the Helix Nebula (NGC~7293, PNG 036.1-57.1) based on integral-field spectroscopy from the…
The DESIRED temperature-metallicity relations in star-forming regions: probing the Galactic radial and azimuthal metallicity distributions
I. Rafael MartÃnez-Hernández, J. Eduardo Méndez-Delgado, César Esteban +17
We analyse a sample of 225 star-forming regions from the DESIRED-E project, each with simultaneous determinations of the electron temperature from ionized nitrogen and oxygen, $T_{…
Kinematical analysis of PNe with high ADF: Hf 2-2 and M 1-42
Lesly Castañeda-Carlos, Michael G. Richer, Silvia Torres-Peimbert +2
We use deep Echelle spectroscopy of the planetary nebulae Hf 2-2 and M1-42 to study the characteristics of the plasma that gives rise to their high abundance discrepancy factors (7…