The Karl G. Jansky Very Large Array Local Group L-band Survey (LGLBS)
The Karl G. Jansky Very Large Array Local Group L-band Survey (LGLBS)
We present the Local Group L-Band Survey (LGLBS), a Karl G. Jansky Very Large Array (VLA) survey producing the highest quality 21-cm and 1-2 GHz radio continuum images to date for the six VLA-accessible, star-forming, Local Group galaxies. Leveraging the VLA's spectral multiplexing power, we simultaneously survey the 21-cm line at high 0.4 km/s velocity resolution, the 1-2 GHz polarized continuum, and four OH lines. For the massive spiral M31, the dwarf spiral M33, and the dwarf irregular galaxies NGC6822, IC10, IC1613, and the Wolf-Lundmark-Melotte Galaxy (WLM), we use all four VLA configurations and the Green Bank Telescope to reach angular resolutions of $< 5''$ ($10{-}20$~pc) for the 21-cm line with $<10^{20}$~cm$^{-2}$ column density sensitivity, and even sharper views ($< 2''$; $5{-}10$~pc) of the continuum. Targeting these nearby galaxies ($D\lesssim1$ Mpc) reveals a sharp, resolved view of the atomic gas, including 21-cm absorption, and continuum emission from supernova remnants and HII regions. These datasets can be used to test theories of the abundance and formation of cold clouds, the driving and dissipation of interstellar turbulence, and the impact of feedback from massive stars and supernovae. Here, we describe the survey design and execution, scientific motivation, data processing, and quality assurance. We provide a first look at and publicly release the wide-field 21-cm HI data products for M31, M33, and four dwarf irregular targets in the survey, which represent some of the highest physical resolution 21-cm observations of any external galaxies beyond the LMC and SMC.
Eric W. Koch、Adam K. Leroy、Erik W. Rosolowsky、Laura Chomiuk、Julianne J. Dalcanton、Nickolas M. Pingel、Sumit K. Sarbadhicary、Sne?ana Stanimirovi?、Fabian Walter、Haylee N. Archer、Alberto D. Bolatto、Michael P. Busch、Hongxing Chen、Ryan Chown、Harrisen Corbould、Serena A. Cronin、Jeremy Darling、Thomas Do、Jennifer Donovan Meyer、Cosima Eibensteiner、Deidre Hunter、Rémy Indebetouw、Preshanth Jagannathan、Amanda A. Kepley、Chang-Goo Kim、Shin-Jeong Kim、Timea O. Kovacs、Joshua Marvil、Eric J. Murphy、Claire E. Murray、Jürgen Ott、D. J. Pisano、Mary Putman、Daniel R. Rybarczyk、Julia Roman-Duval、Karin Sandstrom、Eva Schinnerer、Evan D. Skillman、Adam Smercina、Ioana Stelea、Jay Strader、Jiayi Sun、Devisree Tallapaneni、Elizabeth Tarantino、Vicente Villanueva、Daniel R. Weisz、Thomas G. Williams、Tony Wong
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Eric W. Koch,Adam K. Leroy,Erik W. Rosolowsky,Laura Chomiuk,Julianne J. Dalcanton,Nickolas M. Pingel,Sumit K. Sarbadhicary,Sne?ana Stanimirovi?,Fabian Walter,Haylee N. Archer,Alberto D. Bolatto,Michael P. Busch,Hongxing Chen,Ryan Chown,Harrisen Corbould,Serena A. Cronin,Jeremy Darling,Thomas Do,Jennifer Donovan Meyer,Cosima Eibensteiner,Deidre Hunter,Rémy Indebetouw,Preshanth Jagannathan,Amanda A. Kepley,Chang-Goo Kim,Shin-Jeong Kim,Timea O. Kovacs,Joshua Marvil,Eric J. Murphy,Claire E. Murray,Jürgen Ott,D. J. Pisano,Mary Putman,Daniel R. Rybarczyk,Julia Roman-Duval,Karin Sandstrom,Eva Schinnerer,Evan D. Skillman,Adam Smercina,Ioana Stelea,Jay Strader,Jiayi Sun,Devisree Tallapaneni,Elizabeth Tarantino,Vicente Villanueva,Daniel R. Weisz,Thomas G. Williams,Tony Wong.The Karl G. Jansky Very Large Array Local Group L-band Survey (LGLBS)[EB/OL].(2025-06-13)[2025-06-30].https://arxiv.org/abs/2506.11792.点此复制
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