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| Local Volume Legacy Survey | |
|---|---|
| Name | Local Volume Legacy Survey |
| Abbreviation | LVL |
| Type | Astronomical survey |
| Wavelength | Infrared, Optical, Ultraviolet |
| Started | 2000s |
| Instruments | Spitzer Space Telescope, GALEX, Hubble Space Telescope |
| Area | Local Volume (within ~11 Mpc) |
| Objects | Nearby galaxies, dwarf galaxies, star-forming regions |
Local Volume Legacy Survey The Local Volume Legacy Survey is a multiwavelength observational program targeting galaxies within the nearby Local Volume to characterize their star formation, interstellar medium, and stellar populations. It combines imaging and spectroscopic data from spaceborne observatories such as Spitzer Space Telescope, GALEX, and Hubble Space Telescope with ground-based facilities like the Very Large Array and the Sloan Digital Sky Survey to produce uniform, publicly released datasets. The survey bridges studies of objects such as Messier 81, NGC 2403, and local dwarf systems including IC 1613 and NGC 6822 to inform models used by projects like Sloan Digital Sky Survey and missions such as James Webb Space Telescope.
The survey defined a volume-limited sample of nearby galaxies based on distance indicators including observations from Cepheid variables, Tip of the Red Giant Branch, and secondary standards tied to the Hubble Space Telescope distance scale. It emphasized well-studied systems like M33, M82, and NGC 300 while including low-mass dwarfs catalogued in compilations by Karachentsev and teams associated with the Local Group. The LVL sample facilitated cross-comparison with legacy programs such as the SINGS project and complemented surveys like THINGS and KINGFISH.
Survey design integrated imaging at ultraviolet wavelengths from GALEX, mid- and far-infrared mapping from Spitzer Space Telescope instruments (Infrared Array Camera, Multiband Imaging Photometer for Spitzer), and high-resolution optical imaging from Hubble Space Telescope instruments including Advanced Camera for Surveys and Wide Field Camera 3. Radio observations were coordinated with arrays including the Very Large Array and single-dish facilities such as the Green Bank Telescope. Ground-based spectroscopy and ancillary photometry came from programs tied to Keck Observatory, Gemini Observatory, and the Subaru Telescope. Distances and membership relied on work by teams associated with Carnegie Institution for Science and catalogs like the Nearby Galaxies Catalog.
Public releases provided calibrated multiwavelength mosaics, point-source catalogs, integrated photometry, and derived maps of dust, gas, and stellar mass for systems including NGC 2403, M81 Group, and Leo I. Processing pipelines built upon reduction tools used in Spitzer Science Center and software packages developed for Hubble Space Telescope legacy programs. Value-added products included star formation rate maps tied to calibrations from Kennicutt–Schmidt law studies and spectral energy distribution fits compared to models from the Padova and Bruzual & Charlot libraries. Cross-matches leveraged catalogs from Two Micron All Sky Survey and the Sloan Digital Sky Survey.
Primary objectives included quantifying low-mass galaxy star formation histories, calibrating infrared and ultraviolet tracers using resolved stellar populations in systems such as NGC 6822 and IC 2574, and measuring dust-to-gas ratios across metallicity gradients exemplified by NGC 300 and NGC 6822. Key results refined the relation between infrared luminosity and star formation rate used in extragalactic studies influenced by work from Robert Kennicutt and collaborators, clarified dust attenuation laws in low-metallicity systems in line with analyses by Elvis and Calzetti, and provided benchmark datasets used by theoretical groups working with simulations from the Illustris and EAGLE projects. LVL outputs informed studies of environmental effects on dwarfs in the M81 Group and comparisons to Local Group members such as Large Magellanic Cloud and Small Magellanic Cloud.
Major participating missions and facilities included Spitzer Space Telescope, GALEX, Hubble Space Telescope, the Very Large Array, Keck Observatory, Gemini Observatory, and the Green Bank Telescope. Collaborating institutions spanned the Space Telescope Science Institute, National Radio Astronomy Observatory, Caltech, Harvard–Smithsonian Center for Astrophysics, and the Max Planck Institute for Astronomy. The survey interfaced with legacy consortia like SINGS, THINGS, KINGFISH, and survey science teams associated with SDSS and the Two Micron All Sky Survey.
The dataset serves as a local benchmark for high-redshift studies undertaken with instruments like James Webb Space Telescope and surveys such as COSMOS, enabling empirical calibrations of star formation indicators and dust corrections used in studies of galaxy evolution across cosmic time. LVL legacy catalogs underpin comparisons in works published in journals like The Astrophysical Journal, Monthly Notices of the Royal Astronomical Society, and Astronomy & Astrophysics, and continue to be utilized by research teams working on stellar population synthesis and cosmological simulations including Illustris and EAGLE.
Category:Astronomical surveys