Abhishek Paswan
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View article: An Accreting Supermassive Black Hole Buried in a Faint Dwarf Galaxy
An Accreting Supermassive Black Hole Buried in a Faint Dwarf Galaxy Open
In the last decade, there have been several discoveries of active galactic nuclei (AGN) in dwarf galaxies including an AGN in an ultracompact dwarf galaxy with a black hole mass >10 6 M ⊙ . However, finding a supermassive black hole (SMBH)…
View article: An Accreting Supermassive Black Hole Buried in a Faint Dwarf Galaxy
An Accreting Supermassive Black Hole Buried in a Faint Dwarf Galaxy Open
In the last decade, there have been several discoveries of Active Galactic Nuclei (AGN) in dwarf galaxies including an AGN in an ultra-compact dwarf galaxy with a Black Hole mass $>$10$^{6}$ M$_{\odot}$. However, finding a Supermassive Bla…
View article: An Accreting Supermassive Black Hole Buried in a Faint Dwarf Galaxy
An Accreting Supermassive Black Hole Buried in a Faint Dwarf Galaxy Open
In the last decade, there have been several discoveries of Active Galactic Nuclei (AGN) in dwarf galaxies including an AGN in an ultra-compact dwarf galaxy with a Black Hole mass >10 6 M ⊙ . However, finding a Supermassive Black Hole (SMBH…
View article: Automated detection of double nuclei galaxies using <scp>Gothic</scp> and the discovery of a large sample of dual AGN
Automated detection of double nuclei galaxies using <span>Gothic</span> and the discovery of a large sample of dual AGN Open
We present a novel algorithm to detect double nuclei galaxies (DNG) called Gothic (Graph-bOosTed iterated HIll Climbing) – that detects whether a given image of a galaxy has two or more closely separated nuclei. Our aim is to test for the …
View article: Witnessing the star formation quenching in <i>L</i>* ellipticals
Witnessing the star formation quenching in <i>L</i>* ellipticals Open
We study the evolution of L* elliptical galaxies in the colour–magnitude diagram in terms of their star formation history and environment, in an attempt to learn about their quenching process. We have visually extracted 1109 L* galaxies fr…
View article: Unveiling an Old Disk around a Massive Young Leaking Blueberry in SDSS-IV MaNGA
Unveiling an Old Disk around a Massive Young Leaking Blueberry in SDSS-IV MaNGA Open
Extreme emission-line galaxies, such as blue compact dwarfs (BCDs), Green Peas (GPs), and blueberries in the local universe are potential candidates for understanding the nature of galaxies that reionized the early universe. Being low-mass…
View article: SDSS-IV MaNGA: Observational Evidence of a Density-bounded Region in a Lyα Emitter
SDSS-IV MaNGA: Observational Evidence of a Density-bounded Region in a Lyα Emitter Open
Using integral field unit spectroscopy, we present here the spatially resolved morphologies of [S ii ] λ 6717,6731/H α and [S ii ] λ 6717,6731/[O iii ] λ 5007 emission line ratios for the first time in a blueberry Ly α emitter (BBLAE) at z…
View article: SDSS-IV MaNGA: an observational evidence of density bounded region in a Lyman-$\alpha$ emitter
SDSS-IV MaNGA: an observational evidence of density bounded region in a Lyman-$\alpha$ emitter Open
Using Integral Field Unit (IFU) spectroscopy, we present here the spatially\nresolved morphologies of [SII]$\\lambda$6717,6731/H$\\alpha$ and\n[SII]$\\lambda$6717,6731/[OIII]$\\lambda$5007 emission line ratios for the first\ntime in a Blue…
View article: SDSS-IV MaNGA: Blueberry Candidates Associated with LSB Galaxies $-$ Merger or Tidal Dwarf Systems ?
SDSS-IV MaNGA: Blueberry Candidates Associated with LSB Galaxies $-$ Merger or Tidal Dwarf Systems ? Open
We report here our finding of two new blueberry galaxies using optical IFU spectroscopic data from the MaNGA survey. Both the blueberries are found to be compact ($\leq$ $1 - 2$ kpc) starburst systems located at the outskirts of Low Surfac…
View article: A multiwavelength study of the dual nuclei in Mrk 212
A multiwavelength study of the dual nuclei in Mrk 212 Open
We present radio observations of the galaxy merger remnant Mrk 212 with the Karl G. Jansky Very Large Array (VLA) and the upgraded Giant Meter Radio Telescope (uGMRT). Mrk 212 has two previously known radio sources associated with the two …
View article: Narrow-band Hα imaging of nearby Wolf–Rayet galaxies
Narrow-band Hα imaging of nearby Wolf–Rayet galaxies Open
We present narrow-band Hα imaging of nearby Wolf–Rayet (WR) galaxies known as a subset of starburst galaxies. The Hα images have been used to show morphology of star-forming regions in galaxies, which leads to speculate that the studied ga…
View article: Optical spectroscopy of star-forming regions in dwarf Wolf–Rayet galaxies
Optical spectroscopy of star-forming regions in dwarf Wolf–Rayet galaxies Open
We present here spatially-resolved optical spectroscopic observations of four\nnearby dwarf Wolf-Rayet (WR) galaxies. The ages of the most recent starburst\nevents in these galaxies are found between 3 and 10 Myr. The gas-phase\nmetallicit…
View article: Far-infrared–radio correlation and magnetic field strength in star-forming early-type galaxies
Far-infrared–radio correlation and magnetic field strength in star-forming early-type galaxies Open
A tight far-infrared - radio correlation similar to that in star-forming\nlate-type galaxies is also indicated in star-forming blue early-type galaxies,\nin which the nuclear optical-line emissions are primarily due to star-forming\nactivi…
View article: Tidal interaction, star formation and chemical evolution in blue compact dwarf galaxy Mrk 22
Tidal interaction, star formation and chemical evolution in blue compact dwarf galaxy Mrk 22 Open
The optical spectroscopic and radio interferometric HI 21 cm-line observations of the blue compact dwarf galaxy Mrk 22 are presented. The Wolf-Rayet (WR) emission line features corresponding to high ionization lines of HeII $\lambda$4686 a…
View article: Radio-far infrared correlation and magnetic field strengths in blue early-type galaxies
Radio-far infrared correlation and magnetic field strengths in blue early-type galaxies Open
A radio-far infrared correlation is constructed for a sample of blue early-type galaxies in which optical-line emissions are known to be originating in star-forming activities without any significant contribution from active galactic nucle…
View article: Radio continuum detection in blue early-type weak-emission-line galaxies
Radio continuum detection in blue early-type weak-emission-line galaxies Open
The star formation rates (SFRs) in weak emission line (WEL) galaxies in a\nvolume-limited ($0.02 < z < 0.05$) sample of blue early-type galaxies (ETGs)\nidentified from SDSS, are constrained here using 1.4 GHz radio continuum\nemission. Th…