FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3100478730> ?p ?o ?g. }

• W3100478730 endingPage "3777" @default.
• W3100478730 startingPage "3761" @default.
• W3100478730 abstract "We present a sample of spectroscopically confirmed quasi-stellar objects (QSOs) with FUV–NUV color (as measured by Galaxy Evolution Explorer (GALEX) photometry, FUV band: 1344–1786 Å, NUV band: 1771–2831 Å) bluer than canonical QSO templates and than the majority of known QSOs. We analyze their FUV to NIR colors, luminosities, and optical spectra. The sample includes a group of 150 objects at low redshift (z < 0.5), and a group of 21 objects with redshift 1.7 < z < 2.6. For the low-redshift objects, the blue FUV–NUV color may be caused by enhanced Lyα emission, since Lyα transits the GALEX FUV band from z = 0.1 to z = 0.47. Synthetic QSO templates constructed with Lyα up to three times stronger than in standard templates match the observed UV colors of our low-redshift sample. Optical photometric and spectroscopic properties of these QSOs are not atypical. The Hα emission increases, and the optical spectra become bluer, with increasing absolute UV luminosity. The lack of selected objects at intermediate redshift is consistent with the fact that for z = 0.48–1.63, Lyα is included in the GALEX NUV band, making the observed FUV–NUV redder than the limit of our sample selection. The UV-blue QSOs at redshift ∼2, where the GALEX bands sample rest-frame ≈450–590 Å (FUV) and ≈590–940 Å (NUV), are fainter than the average of UV-normal QSOs at similar redshift in NUV, while they have comparable luminosities in other bands. Therefore, we speculate that their observed FUV–NUV color may be explained by a combination of steep flux rise toward short wavelengths and dust absorption below the Lyman limit, such as from small grains or crystalline carbon (nanodiamonds). The ratio of Lyα to C iv could be measured in 10 objects; it is higher (30% on average) than for UV-normal QSOs, and close to the value expected for shock or collisional ionization. However, optical spectra are taken at different times than the UV photometry, which may bias the comparison if lines are variable. These QSO groups are uniquely set apart by the GALEX photometry within larger samples, given that their optical properties are not unusual." @default.
• W3100478730 created "2020-11-23" @default.
• W3100478730 creator A5010820334 @default.
• W3100478730 creator A5019112931 @default.
• W3100478730 creator A5023293954 @default.
• W3100478730 creator A5039912279 @default.
• W3100478730 creator A5040461195 @default.
• W3100478730 creator A5075591111 @default.
• W3100478730 date "2009-03-04" @default.
• W3100478730 modified "2023-10-12" @default.
• W3100478730 title "ULTRAVIOLET QUASI-STELLAR OBJECTS" @default.
• W3100478730 cites W1968889381 @default.
• W3100478730 cites W1985328401 @default.
• W3100478730 cites W1996537612 @default.
• W3100478730 cites W2049548874 @default.
• W3100478730 cites W2090231561 @default.
• W3100478730 cites W2105041115 @default.
• W3100478730 cites W2111817932 @default.
• W3100478730 cites W3100896718 @default.
• W3100478730 cites W3101017100 @default.
• W3100478730 cites W3105988471 @default.
• W3100478730 cites W3122112131 @default.
• W3100478730 doi "https://doi.org/10.1088/0004-6256/137/4/3761" @default.
• W3100478730 hasPublicationYear "2009" @default.
• W3100478730 type Work @default.
• W3100478730 sameAs 3100478730 @default.
• W3100478730 citedByCount "21" @default.
• W3100478730 countsByYear W31004787302012 @default.
• W3100478730 countsByYear W31004787302014 @default.
• W3100478730 countsByYear W31004787302015 @default.
• W3100478730 countsByYear W31004787302017 @default.
• W3100478730 countsByYear W31004787302019 @default.
• W3100478730 countsByYear W31004787302020 @default.
• W3100478730 countsByYear W31004787302022 @default.
• W3100478730 countsByYear W31004787302023 @default.
• W3100478730 crossrefType "journal-article" @default.
• W3100478730 hasAuthorship W3100478730A5010820334 @default.
• W3100478730 hasAuthorship W3100478730A5019112931 @default.
• W3100478730 hasAuthorship W3100478730A5023293954 @default.
• W3100478730 hasAuthorship W3100478730A5039912279 @default.
• W3100478730 hasAuthorship W3100478730A5040461195 @default.
• W3100478730 hasAuthorship W3100478730A5075591111 @default.
• W3100478730 hasBestOaLocation W31004787301 @default.
• W3100478730 hasConcept C121332964 @default.
• W3100478730 hasConcept C12287442 @default.
• W3100478730 hasConcept C1276947 @default.
• W3100478730 hasConcept C150846664 @default.
• W3100478730 hasConcept C2776968204 @default.
• W3100478730 hasConcept C33024259 @default.
• W3100478730 hasConcept C44870925 @default.
• W3100478730 hasConcept C4839761 @default.
• W3100478730 hasConcept C68271606 @default.
• W3100478730 hasConcept C98444146 @default.
• W3100478730 hasConceptScore W3100478730C121332964 @default.
• W3100478730 hasConceptScore W3100478730C12287442 @default.
• W3100478730 hasConceptScore W3100478730C1276947 @default.
• W3100478730 hasConceptScore W3100478730C150846664 @default.
• W3100478730 hasConceptScore W3100478730C2776968204 @default.
• W3100478730 hasConceptScore W3100478730C33024259 @default.
• W3100478730 hasConceptScore W3100478730C44870925 @default.
• W3100478730 hasConceptScore W3100478730C4839761 @default.
• W3100478730 hasConceptScore W3100478730C68271606 @default.
• W3100478730 hasConceptScore W3100478730C98444146 @default.
• W3100478730 hasIssue "4" @default.
• W3100478730 hasLocation W31004787301 @default.
• W3100478730 hasLocation W31004787302 @default.
• W3100478730 hasLocation W31004787303 @default.
• W3100478730 hasOpenAccess W3100478730 @default.
• W3100478730 hasPrimaryLocation W31004787301 @default.
• W3100478730 hasRelatedWork W103768418 @default.
• W3100478730 hasRelatedWork W1553230000 @default.
• W3100478730 hasRelatedWork W2063294917 @default.
• W3100478730 hasRelatedWork W2099551201 @default.
• W3100478730 hasRelatedWork W2172172874 @default.
• W3100478730 hasRelatedWork W2283233685 @default.
• W3100478730 hasRelatedWork W2609401563 @default.
• W3100478730 hasRelatedWork W3098997918 @default.
• W3100478730 hasRelatedWork W3105454402 @default.
• W3100478730 hasRelatedWork W38639595 @default.
• W3100478730 hasVolume "137" @default.
• W3100478730 isParatext "false" @default.
• W3100478730 isRetracted "false" @default.
• W3100478730 magId "3100478730" @default.
• W3100478730 workType "article" @default.