We present a reassessment of the radial abundance gradients of He, C, N, O, Ne, S, Cl, and
Ar in the Milky Way using the deep optical spectra of 42 H ii regions presented in Arellano …

We present a multiwavelength analysis of a∼ 30'× 30'area around the Sh 2-53 region
(hereafter S53 complex), which is associated with at least three H ii regions, two mid-infrared …

Context. The surroundings of H ii regions can have a profound influence on their
development, morphology, and evolution. This paper explores the effect of the environment …

Young H ii regions are an important site for the study of O star formation based on
distributions of ionized and molecular gas. We reveal that two molecular clouds at∼ 48 km …

Abstract The bubble G15. 684-0.29 has a radius of 15.7 pc. Its large size indicates that it may
have enough time to trigger star formation. We identify 39 dense cold clumps around the …

Aims. The process of gravitational fragmentation in the L1482 molecular filament of the
California molecular cloud is studied by combining several complementary observations …

This paper presents a multiwavelength investigation of the Galactic H ii region IRAS 17149−
3916. Using the Giant Meterwave Radio Telescope, India, first low-frequency radio …

Mid-infrared shells or bubbles around expanding H ii regions have received much attention
due to their ability to initiate a new generation of star formation. We present multi-wavelength …

Plages are the magnetically active chromospheric structures prominently visible in the Ca ii
K line (3933.67 Å). A plage may or may not be associated with a sunspot, which is a …

We studied the cloud-cloud collision candidate G323. 18+ 0.15 based on signatures of
induced filaments, clumps, and star formation. We used archival molecular spectrum line …