Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/31301
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Law, David R. | en_US |
dc.contributor.author | Westfall, Kyle B. | en_US |
dc.contributor.author | Bershady, Matthew A. | en_US |
dc.contributor.author | Cappellari, Michele | en_US |
dc.contributor.author | Yan, Renbin | en_US |
dc.contributor.author | BELFIORE, FRANCESCO MICHEL CONCETTO | en_US |
dc.contributor.author | Bizyaev, Dmitry | en_US |
dc.contributor.author | Brownstein, Joel R. | en_US |
dc.contributor.author | Chen, Yanping | en_US |
dc.contributor.author | Cherinka, Brian | en_US |
dc.contributor.author | Drory, Niv | en_US |
dc.contributor.author | Lazarz, Daniel | en_US |
dc.contributor.author | Shetty, Shravan | en_US |
dc.date.accessioned | 2022-01-04T14:37:50Z | - |
dc.date.available | 2022-01-04T14:37:50Z | - |
dc.date.issued | 2021 | en_US |
dc.identifier.issn | 0004-6256 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31301 | - |
dc.description.abstract | The Sloan Digital Sky Survey IV Mapping Nearby Galaxies at APO (MaNGA) program has been operating from 2014 to 2020, and has now observed a sample of 9269 galaxies in the low redshift universe (z ∼ 0.05) with integral-field spectroscopy. With rest-optical (λλ0.36-1.0 μm) spectral resolution R ∼ 2000 the instrumental spectral line-spread function (LSF) typically has 1σ width of about 70 km s−1, which poses a challenge for the study of the typically 20-30 km s−1 velocity dispersion of the ionized gas in present-day disk galaxies. In this contribution, we present a major revision of the MaNGA data pipeline architecture, focusing particularly on a variety of factors impacting the effective LSF (e.g., under-sampling, spectral rectification, and data cube construction). Through comparison with external assessments of the MaNGA data provided by substantially higher-resolution R ∼ 10,000 instruments, we demonstrate that the revised MPL-10 pipeline measures the instrumental LSF sufficiently accurately (≤0.6% systematic, 2% random around the wavelength of Hα) that it enables reliable measurements of astrophysical velocity dispersions σHα ∼ 20 km s−1 for spaxels with emission lines detected at signal-to-noise ratio > 50. Velocity dispersions derived from [O II], Hβ, [O III], [N II], and [S II] are consistent with those derived from Hα to within about 2% at σHα > 30 km s−1. Although the impact of these changes to the estimated LSF will be minimal at velocity dispersions greater than about 100 km s−1, scientific results from previous data releases that are based on dispersions far below the instrumental resolution should be reevaluated. | en_US |
dc.language.iso | eng | en_US |
dc.title | SDSS-IV MaNGA: Modeling the spectral line-spread function to subpercent accuracy | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-3881/abcaa2 | en_US |
dc.identifier.scopus | 2-s2.0-85099218361 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-3881/abcaa2 | en_US |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85099218361 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 161 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 52 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTRONOMICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2021AJ....161...52L | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | mixedopen | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0002-2545-5752 | - |
crisitem.journal.journalissn | 0004-6256 | - |
crisitem.journal.ance | E016224 | - |
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Law_2021_AJ_161_52.pdf | [Administrators only] | 3.24 MB | Adobe PDF | |
2011.04675.pdf | preprint | 5.32 MB | Adobe PDF | Visualizza/apri |
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