398 citations · 1.9k across the 38 of their papers we have counts for
23 papers · 1 filter
From Atomic Gas to Star Formation
Erik Rosolowsky, Eric Koch, Sambit Roychowdhury +9
Since the 2015 SKA Chapters, the advent of panchromatic observations of nearby galaxies, capable of resolving the interstellar medium (ISM) into individual star-forming regions and…
Pearls on a string: Dark and bright galaxies on a strikingly straight and narrow filament
Maryam Arabsalmani, Sambit Roychowdhury, Benjamin Schneider +11
We identify a chain of galaxies along an almost straight line in the nearby Universe with a projected length of ~5 Mpc. The galaxies are distributed within projected distances of o…
The Smallest Scale of Hierarchy Survey (SSH) III. Dwarf-dwarf satellite merging phenomena in the low-mass regime
Elena Sacchi, Michele Bellazzini, Francesca Annibali +13
We present new deep, wide-field Large Binocular Telescope (LBT) and imaging data from the Smallest Scale of Hierarchy Survey (SSH) revealing previously undetected tidal fea…
DEVILS/MIGHTEE/GAMA/DINGO: The Impact of SFR Timescales on the SFR-Radio Luminosity Correlation
Robin H. W. Cook, Luke J. M. Davies, Jonghwan Rhee +20
The tight relationship between infrared luminosity (L) and 1.4 GHz radio continuum luminosity (L) has proven useful for understanding star formatio…
MIGHTEE-HI: HI galaxy properties in the large scale structure environment at z~0.37 from a stacking experiment
Francesco Sinigaglia, Giulia Rodighiero, Ed Elson +20
We present the first measurement of HI mass of star-forming galaxies in different large scale structure environments from a blind survey at . In particular, we carry ou…
The resolved scaling relations in DustPedia: Zooming in on the local Universe
Viviana Casasola, Simone Bianchi, Laura Magrini +18
We perform a homogeneous analysis of an unprecedented set of spatially resolved scaling relations (SRs) between ISM components and other properties in the range of scales 0.3-3.4 k…
Deep Investigation of Neutral Gas Origins (DINGO): HI stacking experiments with early science data
Jonghwan Rhee, Martin Meyer, Attila Popping +19
We present early science results from Deep Investigation of Neutral Gas Origins (DINGO), an HI survey using the Australian Square Kilometre Array Pathfinder (ASKAP). Using ASKAP su…
Probing galaxy evolution through HI 21-cm emission and absorption: current status and prospects with the Square Kilometre Array
Rajeshwari Dutta, Sushma Kurapati, J. N. H. S. Aditya +8
One of the major science goals of the Square Kilometre Array (SKA) is to understand the role played by atomic hydrogen (HI) gas in the evolution of galaxies throughout cosmic time.…
Unusual gas structure in an otherwise normal spiral galaxy hosting GRB 171205A / SN 2017iuk
M. Arabsalmani, S. Roychowdhury, F. Renaud +4
We study the structure of atomic hydrogen (HI) in the host galaxy of GRB 171205A / SN 2017iuk at z=0.037 through HI 21cm emission line observations with the Karl G. Jansky Very Lar…
ALMA/ACA CO Survey of the IC 1459 and NGC 4636 Groups: Environmental Effects on the Molecular Gas of Group Galaxies
Bumhyun Lee, Jing Wang, Aeree Chung +30
We present new results of a 12CO(J=1-0) imaging survey using the Atacama Compact Array (ACA) for 31 HI detected galaxies in the IC 1459 and NGC 4636 groups. This is the first CO im…
The variation of the gas content of galaxy groups and pairs compared to isolated galaxies
Sambit Roychowdhury, Martin J. Meyer, Jonghwan Rhee +17
We measure how the atomic gas (HI) fraction () of groups and pairs taken as single units vary with average stellar mass ($\langle {\rm M_*} \rang…
WALLABY pre-pilot survey: Two dark clouds in the vicinity of NGC 1395
O. Ivy Wong, A. R. H. Stevens, B. -Q. For +34
We present the Australian Square Kilometre Array Pathfinder (ASKAP) WALLABY pre-pilot observations of two `dark' HI sources (with HI masses of a few times 10^8 Msol and no known st…
A Nearby Galaxy Perspective on Dust Evolution. Scaling relations and constraints on the dust build-up in galaxies with the DustPedia and DGS samples
Frédéric Galliano, Angelos Nersesian, Simone Bianchi +14
Methods. We have modelled a sample of ~800 nearby galaxies, spanning a wide range of metallicity, gas fraction, specific star formation rate and Hubble stage. We have derived the d…
Local starburst conditions and formation of GRB 980425 / SN 1998bw within a collisional ring
M. Arabsalmani, F. Renaud, S. Roychowdhury +9
We present the first spatially resolved study of molecular gas in the vicinity of a Gamma Ray Burst, using CO(2-1) emission line observations with the Atacama Large Millimetre Arra…
A superluminous supernova in high surface density molecular gas within the bar of a metal-rich galaxy
M. Arabsalmani, S. Roychowdhury, F. Renaud +8
We report the Atacama Large Millimeter/submillimeter Array (ALMA) observations of the metal rich host galaxy of superluminous supernova (SLSN) PTF10tpz, a barred spiral galaxy at z…
The host galaxy of GRB 980425 / SN1998bw: a collisional ring galaxy
M. Arabsalmani, S. Roychowdhury, T. K. Starkenburg +8
We report Giant Metrewave Radio Telescope (GMRT) , Very Large Telescope (VLT) and Spitzer Space Telescope observations of ESO 184G82, the host galaxy of GRB 980425/SN 1998bw, th…
A systematic metallicity study of DustPedia galaxies reveals evolution in the dust-to-metal ratios
P. De Vis, A. Jones, S. Viaene +17
Observations of evolution in the dust-to-metal ratio allow us to constrain the dominant dust processing mechanisms. In this work, we present a study of the dust-to-metal and dust-t…
Extended Schmidt law holds for faint dwarf irregular galaxies
Sambit Roychowdhury, Jayaram N. Chengalur, Yong Shi
The extended Schmidt law (ESL) is a variant of the Schmidt law which relates the surface densities of gas and star formation, with the surface density of stellar mass added as an e…
New insights into the interstellar medium of the dwarf galaxy IC 10: connection between magnetic fields, the radio--infrared correlation and star formation
Aritra Basu, Sambit Roychowdhury, Volker Heesen +4
We present the highest sensitivity and angular resolution study at 0.32 GHz of the dwarf irregular galaxy IC\,10, observed using the Giant Metrewave Radio Telescope, probing $\sim4…
The Bluedisk Survey: molecular gas distribution and scaling relations in the context of galaxy evolution
D. Cormier, F. Bigiel, J. Wang +8
One of the key goals of the Bluedisk survey is to characterize the impact of gas accretion in disc galaxies in the context of galaxy evolution. It contains 50 disc galaxies in the…
First measurement of HI 21cm emission from a GRB host galaxy indicates a post-merger system
Maryam Arabsalmani, Sambit Roychowdhury, Martin Zwaan +2
We report the detection and mapping of atomic hydrogen in HI 21cm emission from ESO 184-G82, the host galaxy of the gamma ray burst 980425. This is the first instance where HI in e…
The spatially resolved Kennicutt-Schmidt relation in the HI dominated regions of spiral and dwarf irregular galaxies
Sambit Roychowdhury, Mei-Ling Huang, Guinevere Kauffmann +2
We study the Kennicutt-Schmidt relation between average star formation rate and average cold gas surface density in the Hi dominated ISM of nearby spiral and dwarf irregular galaxi…
The relation between atomic gas and star formation rate densities in faint irregular galaxies
Sambit Roychowdhury, Jayaram N. Chengalur, Serafim S. Kaisin +1
We use data for faint (M_B > -14.5) dwarf irregular galaxies drawn from the FIGGS survey to study the correlation between the atomic gas density (Sigma_gas,atomic) and star formati…