J/AJ/117/1708ivo://CDS.VizieR/J/AJ/117/1708doi:10.26093/cds/vizier.51171708CDSJohnson K.E.Vacca W.D.Leitherer C.Conti P.S.Lipscy S.J.2023-04-06T16:50:32Z2000-04-13T15:50:01ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frstellar-associationsvisible-astronomyphotographic-photometryultraviolet-photometryWe use Hubble Space Telescope (HST) Faint Object Camera (FOC) ultraviolet (UV) and WFPC2 optical images in conjunction with UV spectroscopic observations taken with the Goddard High Resolution Spectrograph to examine the star formation history and properties of the interacting galaxy system NGC 1741 in the Hickson Compact Group 31. The high spatial resolution afforded by HST has allowed us to identify a large number of starburst knots, or "superstar clusters" (SSCs), in the starburst regions of this system. Photometry of these SSCs in the UV and optical bands indicates that most of these objects have ages of a few Myr, with a few up to ~100Myr, and masses between 10^4^ and 10^6^M_{sun}_. The estimated age is confirmed by a spectral synthesis analysis of one knot for which we have obtained a UV spectrum. The V-band luminosity function of the SSCs is well represented by a power law {Phi}(L)~L^-{alpha}^ with an index of -1.85, with no evidence of a turnover brighter than the completeness limit. These properties are in good agreement with those found for SSCs in other starburst galaxies. Our results support the suggestion that some of these SSCs may be extremely young globular clusters formed in a relatively recent starburst episode that has been triggered by a merger event.1999AJ....117.1708Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/117/1708CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/117/1708https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/117/1708http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/117/1708https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/117/1708https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/117/1708http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/117/1708GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/117/1708/table2 (Magnitudes measured for the SSCs in NGC 1741)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/117/1708/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/117/1708/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/117/1708/table2?GETtext/xml+votable180.050000true75.4065-4.25852220.005555555555555556HST6/22828https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/117/1708?format=asciiUVdefaultJ/AJ/117/1708/table2Magnitudes measured for the SSCs in NGC 1741recnoRecord number assigned by the VizieR team. Should Not be used for identification.int[JVL99]Sequential numberintf_[JVL99][*] Note on [JVL99] (1)charRAJ2000Right ascension (J2000)DEJ2000Declination (J2000)F220W? F220W magnitudemagfloatnullablee_F220W? rms uncertainty on F220WmagfloatnullableF439W? F439W magnitudemagfloatnullablee_F439W? rms uncertainty on F439WmagfloatnullableF555W? F555W magnitudemagfloatnullablee_F555W? rms uncertainty on F555WmagfloatnullableF675W? ? F675W magnitudemagfloatnullablee_F675W? rms uncertainty on F675WmagfloatnullableF814W? F814W magnitudemagfloatnullablee_F814W? rms uncertainty on F814Wmagfloatnullable