Galatic HII region IRAS 17149$-$3916 -- A multiwavelength study
  This paper presents a multiwavelength investigation of the Galactic HII IRAS
17149$-$3916. Using the Giant Meterwave Radio Telescope, India, first
low-frequency radio continuum observations at 610 and 1280 MHz for this region
are presented. The ionized gas emission displays an interesting cometary
morphology which is likely powered by the early type source, E4 (IRS-1). The
origin of the cometary morphology is discussed under the framework of the
widely accepted bow shock, champagne flow, and clumpy cloud mechanisms. The
mid- and far-infrared data from Spitzer-GLIMPSE and Herschel-Hi-GAL reveal a
complex network of pillars, clumps, bubble, filaments, and arcs suggesting the
profound influence of massive stars on the surrounding medium. Triggered star
formation at the tip of an observed pillar structure is reported.
High-resolution ALMA continuum data show a string of cores detected within the
identified clumps. The core masses are well explained by thermal Jeans
fragmentation and support the hierarchical fragmentation scenario. Four
`super-Jeans' cores are identified which, at the resolution of the present data
set, are suitable candidates to form high-mass stars.
