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Investigating star-formation activity in Sh 2-61 H II region
Pandey, Rakesh; Sharma, Saurabh; Dewangan, Lokesh +4 more
Using multi-wavelength data sets, we studied the star-formation activity in H II region Sh 2-61 (hereafter S61). We identified a clustering in the region and estimated the membership using the Gaia proper motion data. The physical environment of S61 is inspected using infrared to radio wavelength images. We also determined the Lyman continuum flux…
Diving deep into the milky way using anti-reflection coatings for astronomical CCDs
Seabroke, George M.; Aggarwal, Anmol; Mittal, Ashi +1 more
We report two anti-reflection (AR) coatings that give better quantum efficiency (QE) than the existing AR coating on the Gaia astrometric field (AF) charged coupled devices (CCDs). Light being the core of optical astronomy is extremely important for such missions, therefore, the QE of the devices that are used to capture it should be substantially…
Revisiting the old end of the Milky Way open cluster age function
Piatti, Andrés E.
Age distribution of the open cluster system is a key piece of information to decipher the star-formation history of the milky way disk. Recently, a remarkable earlier drop of its older end was found, which caught our attention. Precisely, we analysed in detail the population of open clusters older than 1 Gyr located inside a circle of 2.0 kpc from…
Fundamental parameters and stellar mass function of four open clusters close to the galactic plane
Kowshik, Krishna Kumar; Sujatha, S.; Routh, Swati
In the context of understanding star formation in the galactic plane, we present the results from the analysis of four young open clusters using archival data from Gaia Data Release 3, the Two-Micron All Sky Survey (2MASS) and Panoramic Survey Telescope and Rapid Response System (Pan-STARRS). The open clusters—[BDB2003]G085.25‑00.02, [BDS2003]48, …
Infrared polarisation study of Lynds 1340: A case of RNO 8
Ganesh, Shashikiran; Rai, Archita
This paper describes the polarisation study of a Lynds cloud, LDN 1340,
Detection of polycyclic aromatic hydrocarbons on a sample of comets
Bhardwaj, Anil; Ramachandran, R.; Hill, H. +6 more
We present the spectral properties of a selection of comets from both the Jupiter family and Oort cloud in the ultraviolet (UV) and mid-infrared (IR) wavelength regions. Spectroscopic measurements are retrieved from public archival data of the International Ultraviolet Explorer (IUE) and Hubble Space Observatory (HST) in the near-UV (NUV) and far-…