A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/196016 |
Resumo: | We present a spatially resolved stellar population study of the inner∼200 pc radius ofNGC 4303 based on near-infrared integral field spectroscopy with SINFONI/VLT at a spatial resolution of 40–80 pc and using the STARLIGHT code. We found that the distribution of thestellar populations presents a spatial variation, suggesting an age stratification. Three main structures stand out. Two nuclear blobs, one composed by young stars (t≤50 Myr) and onewith intermediate-age stars (50 Myr<t≤2 Gyr), both shifted from the centre. The third oneis an internal intermediate-age spiral arm-like structure, surrounding the blob of young stars.Our results indicate that star formation has occurred through multiple bursts in this source. Furthermore, the youngest stellar populations (t 2 Gyr) are distributed along a circumnu-clear star-forming ring withr∼250 pc. The ring displays star formation rates (SFRs) in therange of 0.002–0.14 M yr−1, favouring the ‘pearls-on-a-string’ scenario. The old underlyingbulge stellar population component (t>2 Gyr) is distributed outside the two blob structures.For the nuclear region (inner∼60 pc radius) we derived an SFR of 0.43 M yr−1and foundno signatures of non-thermal featureless continuum and hot dust emission, supporting thescenario in which an LLAGN/LINER-like source is hidden in the centre of NGC 4303. Thus, our results reveal a rather complex star formation history in NGC 4303, with different stellar population components coexisting with a low efficiency accreting black hole in its centre. |
id |
UFRGS-2_3aefdba63776d1a6bc6a3b8ed26d3308 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/196016 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Dametto, Natacha ZanonRiffel, RogérioColina, LuisRiffel, Rogemar AndréPiqueras López, JavierDavies, Richard I.Burtscher, LeonardMenezes, Roberto BertoldoArribas, SantiagoPastoriza, Miriani GriseldaLabiano, AlvaroStorchi-Bergmann, ThaisaHahn, Luis Gabriel DahmerSales, Dinalva Aires de2019-06-20T02:36:04Z20190035-8711http://hdl.handle.net/10183/196016001095676We present a spatially resolved stellar population study of the inner∼200 pc radius ofNGC 4303 based on near-infrared integral field spectroscopy with SINFONI/VLT at a spatial resolution of 40–80 pc and using the STARLIGHT code. We found that the distribution of thestellar populations presents a spatial variation, suggesting an age stratification. Three main structures stand out. Two nuclear blobs, one composed by young stars (t≤50 Myr) and onewith intermediate-age stars (50 Myr<t≤2 Gyr), both shifted from the centre. The third oneis an internal intermediate-age spiral arm-like structure, surrounding the blob of young stars.Our results indicate that star formation has occurred through multiple bursts in this source. Furthermore, the youngest stellar populations (t 2 Gyr) are distributed along a circumnu-clear star-forming ring withr∼250 pc. The ring displays star formation rates (SFRs) in therange of 0.002–0.14 M yr−1, favouring the ‘pearls-on-a-string’ scenario. The old underlyingbulge stellar population component (t>2 Gyr) is distributed outside the two blob structures.For the nuclear region (inner∼60 pc radius) we derived an SFR of 0.43 M yr−1and foundno signatures of non-thermal featureless continuum and hot dust emission, supporting thescenario in which an LLAGN/LINER-like source is hidden in the centre of NGC 4303. Thus, our results reveal a rather complex star formation history in NGC 4303, with different stellar population components coexisting with a low efficiency accreting black hole in its centre.application/pdfengMonthly notices of the Royal Astronomical Society. Oxford, England. Vol. 482, no. 4 (Feb. 2019), p. 4437-4453Galáxia NGC 4303Formacao de estrelasNucleo galaticoEspectroscopia infravermelhaA SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populationsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001095676.pdf.txt001095676.pdf.txtExtracted Texttext/plain84553http://www.lume.ufrgs.br/bitstream/10183/196016/2/001095676.pdf.txta40a2488cb6250ea8e6b750c2b5a45eeMD52ORIGINAL001095676.pdfTexto completo (inglês)application/pdf6512628http://www.lume.ufrgs.br/bitstream/10183/196016/1/001095676.pdf829ed030bce695c1485b2c448c9d9a95MD5110183/1960162023-10-08 03:34:10.526517oai:www.lume.ufrgs.br:10183/196016Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-10-08T06:34:10Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations |
title |
A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations |
spellingShingle |
A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations Dametto, Natacha Zanon Galáxia NGC 4303 Formacao de estrelas Nucleo galatico Espectroscopia infravermelha |
title_short |
A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations |
title_full |
A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations |
title_fullStr |
A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations |
title_full_unstemmed |
A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations |
title_sort |
A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations |
author |
Dametto, Natacha Zanon |
author_facet |
Dametto, Natacha Zanon Riffel, Rogério Colina, Luis Riffel, Rogemar André Piqueras López, Javier Davies, Richard I. Burtscher, Leonard Menezes, Roberto Bertoldo Arribas, Santiago Pastoriza, Miriani Griselda Labiano, Alvaro Storchi-Bergmann, Thaisa Hahn, Luis Gabriel Dahmer Sales, Dinalva Aires de |
author_role |
author |
author2 |
Riffel, Rogério Colina, Luis Riffel, Rogemar André Piqueras López, Javier Davies, Richard I. Burtscher, Leonard Menezes, Roberto Bertoldo Arribas, Santiago Pastoriza, Miriani Griselda Labiano, Alvaro Storchi-Bergmann, Thaisa Hahn, Luis Gabriel Dahmer Sales, Dinalva Aires de |
author2_role |
author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Dametto, Natacha Zanon Riffel, Rogério Colina, Luis Riffel, Rogemar André Piqueras López, Javier Davies, Richard I. Burtscher, Leonard Menezes, Roberto Bertoldo Arribas, Santiago Pastoriza, Miriani Griselda Labiano, Alvaro Storchi-Bergmann, Thaisa Hahn, Luis Gabriel Dahmer Sales, Dinalva Aires de |
dc.subject.por.fl_str_mv |
Galáxia NGC 4303 Formacao de estrelas Nucleo galatico Espectroscopia infravermelha |
topic |
Galáxia NGC 4303 Formacao de estrelas Nucleo galatico Espectroscopia infravermelha |
description |
We present a spatially resolved stellar population study of the inner∼200 pc radius ofNGC 4303 based on near-infrared integral field spectroscopy with SINFONI/VLT at a spatial resolution of 40–80 pc and using the STARLIGHT code. We found that the distribution of thestellar populations presents a spatial variation, suggesting an age stratification. Three main structures stand out. Two nuclear blobs, one composed by young stars (t≤50 Myr) and onewith intermediate-age stars (50 Myr<t≤2 Gyr), both shifted from the centre. The third oneis an internal intermediate-age spiral arm-like structure, surrounding the blob of young stars.Our results indicate that star formation has occurred through multiple bursts in this source. Furthermore, the youngest stellar populations (t 2 Gyr) are distributed along a circumnu-clear star-forming ring withr∼250 pc. The ring displays star formation rates (SFRs) in therange of 0.002–0.14 M yr−1, favouring the ‘pearls-on-a-string’ scenario. The old underlyingbulge stellar population component (t>2 Gyr) is distributed outside the two blob structures.For the nuclear region (inner∼60 pc radius) we derived an SFR of 0.43 M yr−1and foundno signatures of non-thermal featureless continuum and hot dust emission, supporting thescenario in which an LLAGN/LINER-like source is hidden in the centre of NGC 4303. Thus, our results reveal a rather complex star formation history in NGC 4303, with different stellar population components coexisting with a low efficiency accreting black hole in its centre. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-06-20T02:36:04Z |
dc.date.issued.fl_str_mv |
2019 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/196016 |
dc.identifier.issn.pt_BR.fl_str_mv |
0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001095676 |
identifier_str_mv |
0035-8711 001095676 |
url |
http://hdl.handle.net/10183/196016 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the Royal Astronomical Society. Oxford, England. Vol. 482, no. 4 (Feb. 2019), p. 4437-4453 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/196016/2/001095676.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/196016/1/001095676.pdf |
bitstream.checksum.fl_str_mv |
a40a2488cb6250ea8e6b750c2b5a45ee 829ed030bce695c1485b2c448c9d9a95 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801224969179365376 |