Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4
We analyse high signal-to-noise ratio spectrophotometric observations acquired simultaneously with TWIN, a double-arm spectrograph, from 3400 to 10 400Å of three star-forming regions in the HII galaxy SDSS J165712.75+321141.4. We have measured four line temperatures ?Te([O III]), Te([S III]), Te([O...
| Authors: | ; ; ; ; ; ; ; |
|---|---|
| Format: | Article |
| Status: | Published version |
| Publication date: | 2011 |
| Country: | Argentina |
| Institution: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repository: | CONICET Digital (CONICET) |
| Language: | English |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/138714 |
| Online Access: | http://hdl.handle.net/11336/138714 |
| Access Level: | Open access |
| Keyword: | ISM: abundances HII regions galaxies: abundances galaxies: fundamental parameters galaxies: starburst galaxies: stellar content https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| _version_ | 1878402843497463808 |
|---|---|
| author | Hägele, Guillermo Federico |
| author2 | García Benito, Rubén Pérez Montero, Enrique Díaz, Ángeles I. Cardaci, Monica Viviana Firpo, Verónica Terlevich, Elena Terlevich, Roberto |
| author2_role | author author author author author author author |
| author_browse | Cardaci, Monica Viviana Díaz, Ángeles I. Firpo, Verónica García Benito, Rubén Hägele, Guillermo Federico Pérez Montero, Enrique Terlevich, Elena Terlevich, Roberto |
| author_facet | Hägele, Guillermo Federico García Benito, Rubén Pérez Montero, Enrique Díaz, Ángeles I. Cardaci, Monica Viviana Firpo, Verónica Terlevich, Elena Terlevich, Roberto |
| author_role | author |
| collection | CONICET Digital (CONICET) |
| description | We analyse high signal-to-noise ratio spectrophotometric observations acquired simultaneously with TWIN, a double-arm spectrograph, from 3400 to 10 400Å of three star-forming regions in the HII galaxy SDSS J165712.75+321141.4. We have measured four line temperatures ?Te([O III]), Te([S III]), Te([O II]) and Te([S II])? with high-precision, rms errors of the order of 2, 5, 6 and 6 per cent, respectively, for the brightest region, and slightly worse for the other two. The temperature measurements allowed the direct derivation of ionic abundances of oxygen, sulphur, nitrogen, neon and argon. We have computed CLOUDY tailor-made models which reproduce the O2+-measured thermal and ionic structures within the errors in the three knots, with deviations of only 0.1 dex in the case of O+ and S2+ ionic abundances. In the case of the electron temperature and the ionic abundances of S+/H+, we find major discrepancies which could be the consequence of the presence of colder diffuse gas. The star formation history derived using STARLIGHT shows a similar age distribution of the ionizing population among the three star-forming regions. This fact suggests a similar evolutionary history which is probably related to the process of interaction with a companion galaxy that triggered the star formation in the different regions almost at the same time. The hardness of the radiation field mapped through the use of the softness parameter η is the same within the observational errors for all three regions, implying that the equivalent effective temperatures of the radiation fields are very similar for all the studied regions of the galaxy, in spite of some small differences in the ionization state of different elements. Regarding the kinematics of the galaxy, the gas rotation curve shows a deviation from the circular motion probably due either to an interaction process or to an expanding bubble or shell of the ionized gas approaching us. A dynamical mass of 2.5×10^10Msun is derived from the rotation curve. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | AR_0d2bca04f4b54fc8dcd3e6c6fbdf29a7 |
| identifier_str_mv | Hägele, Guillermo Federico; García Benito, Rubén; Pérez Montero, Enrique; Díaz, Ángeles I. ; Cardaci, Monica Viviana; et al.; Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 414; 1; 1-2011; 1-17 0035-8711 CONICET Digital CONICET |
| institution | Consejo Nacional de Investigaciones Científicas y Técnicas |
| instname_str | Consejo Nacional de Investigaciones Científicas y Técnicas |
| language | eng |
| network_acronym_str | AR |
| network_name_str | Argentina |
| oai_identifier_str | oai:ri.conicet.gov.ar:11336/138714 |
| publishDate | 2011 |
| publishDateSort | 2011 |
| publisher | Wiley Blackwell Publishing, Inc |
| publisherStr | Wiley Blackwell Publishing, Inc |
| reponame_str | CONICET Digital (CONICET) |
| spelling | Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4 Hägele, Guillermo Federico García Benito, Rubén Pérez Montero, Enrique Díaz, Ángeles I. Cardaci, Monica Viviana Firpo, Verónica Terlevich, Elena Terlevich, Roberto ISM: abundances HII regions galaxies: abundances galaxies: fundamental parameters galaxies: starburst galaxies: stellar content https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 We analyse high signal-to-noise ratio spectrophotometric observations acquired simultaneously with TWIN, a double-arm spectrograph, from 3400 to 10 400Å of three star-forming regions in the HII galaxy SDSS J165712.75+321141.4. We have measured four line temperatures ?Te([O III]), Te([S III]), Te([O II]) and Te([S II])? with high-precision, rms errors of the order of 2, 5, 6 and 6 per cent, respectively, for the brightest region, and slightly worse for the other two. The temperature measurements allowed the direct derivation of ionic abundances of oxygen, sulphur, nitrogen, neon and argon. We have computed CLOUDY tailor-made models which reproduce the O2+-measured thermal and ionic structures within the errors in the three knots, with deviations of only 0.1 dex in the case of O+ and S2+ ionic abundances. In the case of the electron temperature and the ionic abundances of S+/H+, we find major discrepancies which could be the consequence of the presence of colder diffuse gas. The star formation history derived using STARLIGHT shows a similar age distribution of the ionizing population among the three star-forming regions. This fact suggests a similar evolutionary history which is probably related to the process of interaction with a companion galaxy that triggered the star formation in the different regions almost at the same time. The hardness of the radiation field mapped through the use of the softness parameter η is the same within the observational errors for all three regions, implying that the equivalent effective temperatures of the radiation fields are very similar for all the studied regions of the galaxy, in spite of some small differences in the ionization state of different elements. Regarding the kinematics of the galaxy, the gas rotation curve shows a deviation from the circular motion probably due either to an interaction process or to an expanding bubble or shell of the ionized gas approaching us. A dynamical mass of 2.5×10^10Msun is derived from the rotation curve. Fil: Hägele, Guillermo Federico. Universidad Autónoma de Madrid. Facultad de Ciencias; España. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: García Benito, Rubén. Universidad Autónoma de Madrid. Facultad de Ciencias; España. Peking University/kavli Inst. Of Astronomy And Astroph.; China Fil: Pérez Montero, Enrique. Inst. de Astrofísica de Andalucía; España Fil: Díaz, Ángeles I.. Universidad Autónoma de Madrid. Facultad de Ciencias; España Fil: Cardaci, Monica Viviana. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Universidad Autónoma de Madrid. Facultad de Ciencias; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Firpo, Verónica. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Terlevich, Elena. Instituto Nacional de Astrofísica, Óptica y Electrónica; México Fil: Terlevich, Roberto. Instituto Nacional de Astrofísica, Óptica y Electrónica; México Wiley Blackwell Publishing, Inc http://hdl.handle.net/11336/138714 Hägele, Guillermo Federico; García Benito, Rubén; Pérez Montero, Enrique; Díaz, Ángeles I. ; Cardaci, Monica Viviana; et al.; Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 414; 1; 1-2011; 1-17 0035-8711 CONICET Digital CONICET |
| spellingShingle | Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4 Hägele, Guillermo Federico ISM: abundances HII regions galaxies: abundances galaxies: fundamental parameters galaxies: starburst galaxies: stellar content https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| status_str | publishedVersion |
| title | Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4 |
| title_full | Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4 |
| title_fullStr | Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4 |
| title_full_unstemmed | Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4 |
| title_short | Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4 |
| title_sort | Abundance determination of multiple star-forming regions in the HII galaxy SDSS J165712.75+321141.4 |
| topic | ISM: abundances HII regions galaxies: abundances galaxies: fundamental parameters galaxies: starburst galaxies: stellar content https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| topic_facet | ISM: abundances HII regions galaxies: abundances galaxies: fundamental parameters galaxies: starburst galaxies: stellar content https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| url | http://hdl.handle.net/11336/138714 |