Massive stars play a pivotal role in shaping the Universe. However, comparisons between observational data and theoretical models of massive stars have given rise to long-standing and new discrepancies that have questioned our understanding of these objects. A main uncertainty arises from the overdensity of B-type supergiants (BSGs) located beyond

MUDEHaR is a multi-epoch photometric survey with two narrow filters in Hα and the calcium triplet window that uses T80Cam at the JAST80 telescope at Javalambre spanish astronomical observatory. It is obtaining 50 epochs/year per field for 20 fields in the Galactic disk, each of two square degrees, for a total of 40 square degrees. Focused on

MEGARA is a fiber-fed spectrograph on the 10.4m Gran Telescopio CANARIAS, offering integral field and multi-object spectroscopy with spectral resolutions of R FWHM ∼ 6{,}000, 12{,}000, and 20{,}000. Our team is developing MEGASTAR, an empirical stellar spectral library based on observations from MEGARA. The goal of MEGASTAR is to provide stellar

Context. Feedback from an active galactic nucleus (AGN) is one of the most important mechanisms in galaxy evolution. This phenomenon is usually found in massive galaxies and is known to regulate star formation. Although dwarf galaxies are assumed to be regulated by supernova feedback, recent studies have offered evidence to support the presence of

We use the public code SteParKin to derive their galactic space velocities, which served us to locate them into the different galactic populations. We also identify candidate members in young stellar kinematic groups with SteParKin, LACEwING, and BANYAN Σ based on their kinematics. From the combination of kinematic assignments as a proxy of age and

While NGC 1514 is an elliptical, but complex, planetary nebula at optical wavelengths, it was discovered to have a pair of infrared-bright, axisymmetric rings contained within its faint outer shell during the course of the Wide-field Infrared Survey Explorer all-sky survey. We have obtained JWST mid-infrared imaging and spectroscopy of the nebula