Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030
Aims. We report on the first detailed multiwavelength study of the radio source G29.37+0.1, which is an as-yet-unclassified object linked to the very-high-energy γ-emitting source HESS J1844-030. The origin of the multiwavelength emission toward G29.37+0.1 has not been clarified so far, leaving open...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v602_n_p_Castelletti http://hdl.handle.net/20.500.12110/paper_00046361_v602_n_p_Castelletti |
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paper:paper_00046361_v602_n_p_Castelletti2023-06-08T14:28:19Z Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030 Castelletti, Gabriela Marta Supan, Jorge Leonardo Petriella, Alberto Giacani, Elsa Beatriz Gamma rays: galaxies ISM: general Radio continuum: galaxies X-rays: general Electromagnetic wave emission Fighter aircraft Galaxies Nuclear fuel reprocessing Pulsars Radio receivers Radio telescopes Spectrum analysis X ray scattering Extragalactic origin Gamma rays: galaxies Giant metrewave radio telescopes ISM: general Multi-wavelength emissions Multi-wavelength study Radio continuum: galaxies X-rays: general Gamma rays Aims. We report on the first detailed multiwavelength study of the radio source G29.37+0.1, which is an as-yet-unclassified object linked to the very-high-energy γ-emitting source HESS J1844-030. The origin of the multiwavelength emission toward G29.37+0.1 has not been clarified so far, leaving open the question about the physical relationship between these sources. Methods. Using observations carried out with the Giant Metrewave Radio Telescope (GMRT), we performed high-quality full-synthesis imaging at 610 MHz of the field containing G29.37+0.1. The obtained data, combined with observations at 1400 MHz from The Multi-Array Galactic Plane Imaging Survey (MAGPIS) were used to investigate in detail the properties of its radio emission. Additionally, we reprocessed archival data obtained with the XMM-Newton and Chandra observatories in order to get a multiwavelength view of this unusual source. Results. The radio source G29.37+0.1 mainly consists of a bright twisted structure, named the S-shaped feature. The high sensitivity of the new GMRT observations allowed the identification of potential lobes, jets, and a nuclear central region in the S-shaped morphology of G29.37+0.1. We also highlight the detection of diffuse and low surface brightness emission enveloping the brightest emitting regions. The brightest emission in G29.37+0.1 has a radio synchrotron spectral index α = 0.59 ± 0.09. Variations in the spectral behaviour are observed across the whole radio source with the flattest spectral features in the central nuclear and jets components (α ~ 0.3). These results lead us to conclude that the brightest radio emission from G29.37+0.1 likely represents a newly recognized radio galaxy. The identification of optical and infrared counterparts to the emission arising from the core of G29.37+0.1 strengthens our interpretation of an extragalactic origin of the radio emission. We performed several tests to explain the physical mechanism responsible for the observed X-ray emission, which appears overlapping the northeastern part of the radio emission. Our spectral analysis demonstrated that a non-Thermal origin for the X-ray emission compatible with a pulsar wind nebula is quite possible. The analysis of the spatial distribution of the CO gas revealed the presence of a complex of molecular clouds located in projection adjacent to the radio halo emission and probably interacting with it. We propose that the faint halo represents a composite supernova remnant with a pulsar powered component given by the diffuse X-ray emission superimposed along the line of sight to the radio galaxy. Further broadband observations of HESS J1844-030 are needed to disentangle its origin, although its shape and position suggest an extragalactic origin connected to G29.37+0.1. © ESO, 2017. Fil:Castelletti, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Supan, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Petriella, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Giacani, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v602_n_p_Castelletti http://hdl.handle.net/20.500.12110/paper_00046361_v602_n_p_Castelletti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Gamma rays: galaxies ISM: general Radio continuum: galaxies X-rays: general Electromagnetic wave emission Fighter aircraft Galaxies Nuclear fuel reprocessing Pulsars Radio receivers Radio telescopes Spectrum analysis X ray scattering Extragalactic origin Gamma rays: galaxies Giant metrewave radio telescopes ISM: general Multi-wavelength emissions Multi-wavelength study Radio continuum: galaxies X-rays: general Gamma rays |
| spellingShingle |
Gamma rays: galaxies ISM: general Radio continuum: galaxies X-rays: general Electromagnetic wave emission Fighter aircraft Galaxies Nuclear fuel reprocessing Pulsars Radio receivers Radio telescopes Spectrum analysis X ray scattering Extragalactic origin Gamma rays: galaxies Giant metrewave radio telescopes ISM: general Multi-wavelength emissions Multi-wavelength study Radio continuum: galaxies X-rays: general Gamma rays Castelletti, Gabriela Marta Supan, Jorge Leonardo Petriella, Alberto Giacani, Elsa Beatriz Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030 |
| topic_facet |
Gamma rays: galaxies ISM: general Radio continuum: galaxies X-rays: general Electromagnetic wave emission Fighter aircraft Galaxies Nuclear fuel reprocessing Pulsars Radio receivers Radio telescopes Spectrum analysis X ray scattering Extragalactic origin Gamma rays: galaxies Giant metrewave radio telescopes ISM: general Multi-wavelength emissions Multi-wavelength study Radio continuum: galaxies X-rays: general Gamma rays |
| description |
Aims. We report on the first detailed multiwavelength study of the radio source G29.37+0.1, which is an as-yet-unclassified object linked to the very-high-energy γ-emitting source HESS J1844-030. The origin of the multiwavelength emission toward G29.37+0.1 has not been clarified so far, leaving open the question about the physical relationship between these sources. Methods. Using observations carried out with the Giant Metrewave Radio Telescope (GMRT), we performed high-quality full-synthesis imaging at 610 MHz of the field containing G29.37+0.1. The obtained data, combined with observations at 1400 MHz from The Multi-Array Galactic Plane Imaging Survey (MAGPIS) were used to investigate in detail the properties of its radio emission. Additionally, we reprocessed archival data obtained with the XMM-Newton and Chandra observatories in order to get a multiwavelength view of this unusual source. Results. The radio source G29.37+0.1 mainly consists of a bright twisted structure, named the S-shaped feature. The high sensitivity of the new GMRT observations allowed the identification of potential lobes, jets, and a nuclear central region in the S-shaped morphology of G29.37+0.1. We also highlight the detection of diffuse and low surface brightness emission enveloping the brightest emitting regions. The brightest emission in G29.37+0.1 has a radio synchrotron spectral index α = 0.59 ± 0.09. Variations in the spectral behaviour are observed across the whole radio source with the flattest spectral features in the central nuclear and jets components (α ~ 0.3). These results lead us to conclude that the brightest radio emission from G29.37+0.1 likely represents a newly recognized radio galaxy. The identification of optical and infrared counterparts to the emission arising from the core of G29.37+0.1 strengthens our interpretation of an extragalactic origin of the radio emission. We performed several tests to explain the physical mechanism responsible for the observed X-ray emission, which appears overlapping the northeastern part of the radio emission. Our spectral analysis demonstrated that a non-Thermal origin for the X-ray emission compatible with a pulsar wind nebula is quite possible. The analysis of the spatial distribution of the CO gas revealed the presence of a complex of molecular clouds located in projection adjacent to the radio halo emission and probably interacting with it. We propose that the faint halo represents a composite supernova remnant with a pulsar powered component given by the diffuse X-ray emission superimposed along the line of sight to the radio galaxy. Further broadband observations of HESS J1844-030 are needed to disentangle its origin, although its shape and position suggest an extragalactic origin connected to G29.37+0.1. © ESO, 2017. |
| author |
Castelletti, Gabriela Marta Supan, Jorge Leonardo Petriella, Alberto Giacani, Elsa Beatriz |
| author_facet |
Castelletti, Gabriela Marta Supan, Jorge Leonardo Petriella, Alberto Giacani, Elsa Beatriz |
| author_sort |
Castelletti, Gabriela Marta |
| title |
Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030 |
| title_short |
Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030 |
| title_full |
Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030 |
| title_fullStr |
Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030 |
| title_full_unstemmed |
Radio and X-ray properties of the source G29.37+0.1 linked to HESS J1844-030 |
| title_sort |
radio and x-ray properties of the source g29.37+0.1 linked to hess j1844-030 |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v602_n_p_Castelletti http://hdl.handle.net/20.500.12110/paper_00046361_v602_n_p_Castelletti |
| work_keys_str_mv |
AT castellettigabrielamarta radioandxraypropertiesofthesourceg293701linkedtohessj1844030 AT supanjorgeleonardo radioandxraypropertiesofthesourceg293701linkedtohessj1844030 AT petriellaalberto radioandxraypropertiesofthesourceg293701linkedtohessj1844030 AT giacanielsabeatriz radioandxraypropertiesofthesourceg293701linkedtohessj1844030 |
| _version_ |
1768546000871358464 |