Studying the molecular ambient towards the young stellar object EGO G35.04-0.47
We are performing a systematic study of the interstellar medium around extended green objects (EGOs), likely massive young stellar objects driving outflows. EGO G35.04-0.47 is located towards a dark cloud at the north-western edge of an H ii region. Recently, H2 jets were discovered towards this sou...
Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00046264_v66_n1_p_Paron |
| Aporte de: |
| id |
todo:paper_00046264_v66_n1_p_Paron |
|---|---|
| record_format |
dspace |
| spelling |
todo:paper_00046264_v66_n1_p_Paron2023-10-03T13:59:44Z Studying the molecular ambient towards the young stellar object EGO G35.04-0.47 Paron, S. Ortega, M. Astort, A. Rubio, M. Fariña, C. ISM: clouds ISM: H ii regions ISM: jets and outflows stars: formation We are performing a systematic study of the interstellar medium around extended green objects (EGOs), likely massive young stellar objects driving outflows. EGO G35.04-0.47 is located towards a dark cloud at the north-western edge of an H ii region. Recently, H2 jets were discovered towards this source, mainly towards its south-west, where the H2 1-0 S(1) emission peaks. Therefore, the source was catalogued as the molecular hydrogen emission-line object MHO 2429. In order to study the molecular ambient towards this star-forming site, we observed a region around the aforementioned EGO using the Atacama Submillimeter Telescope Experiment in the 12CO J = 3-2, 13CO J = 3-2, HCO+ J = 4-3, and CS J = 7-6 lines with an angular and spectral resolution of 22′′ and 0.11 km s-1, respectively. The observations revealed a molecular clump where the EGO is embedded at vLSR ∼ 51 km s-1, in coincidence with the velocity of a Class I 95 GHz methanol maser previously detected. Analyzing the 12CO line we discovered high velocity molecular gas in the range from 34 to 47 km s-1, most likely a blueshifted outflow driven by the EGO. The alignment and shape of this molecular structure coincide with those of the south-west lobe of MHO 2429, mainly between 46 and 47 km s-1, confirming that we are mapping its CO counterpart. Performing a spectral energy distribution analysis of EGO G35.04-0.47, we found that its central object should be an intermediate-mass young stellar object accreting mass at a rate similar to those found in some massive YSOs. We suggest that this source can become a massive YSO. © The Author 2014. Published by Oxford University Press on behalf of the Astronomical Society of Japan. All rights reserved. Fil:Paron, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ortega, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00046264_v66_n1_p_Paron |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
ISM: clouds ISM: H ii regions ISM: jets and outflows stars: formation |
| spellingShingle |
ISM: clouds ISM: H ii regions ISM: jets and outflows stars: formation Paron, S. Ortega, M. Astort, A. Rubio, M. Fariña, C. Studying the molecular ambient towards the young stellar object EGO G35.04-0.47 |
| topic_facet |
ISM: clouds ISM: H ii regions ISM: jets and outflows stars: formation |
| description |
We are performing a systematic study of the interstellar medium around extended green objects (EGOs), likely massive young stellar objects driving outflows. EGO G35.04-0.47 is located towards a dark cloud at the north-western edge of an H ii region. Recently, H2 jets were discovered towards this source, mainly towards its south-west, where the H2 1-0 S(1) emission peaks. Therefore, the source was catalogued as the molecular hydrogen emission-line object MHO 2429. In order to study the molecular ambient towards this star-forming site, we observed a region around the aforementioned EGO using the Atacama Submillimeter Telescope Experiment in the 12CO J = 3-2, 13CO J = 3-2, HCO+ J = 4-3, and CS J = 7-6 lines with an angular and spectral resolution of 22′′ and 0.11 km s-1, respectively. The observations revealed a molecular clump where the EGO is embedded at vLSR ∼ 51 km s-1, in coincidence with the velocity of a Class I 95 GHz methanol maser previously detected. Analyzing the 12CO line we discovered high velocity molecular gas in the range from 34 to 47 km s-1, most likely a blueshifted outflow driven by the EGO. The alignment and shape of this molecular structure coincide with those of the south-west lobe of MHO 2429, mainly between 46 and 47 km s-1, confirming that we are mapping its CO counterpart. Performing a spectral energy distribution analysis of EGO G35.04-0.47, we found that its central object should be an intermediate-mass young stellar object accreting mass at a rate similar to those found in some massive YSOs. We suggest that this source can become a massive YSO. © The Author 2014. Published by Oxford University Press on behalf of the Astronomical Society of Japan. All rights reserved. |
| format |
JOUR |
| author |
Paron, S. Ortega, M. Astort, A. Rubio, M. Fariña, C. |
| author_facet |
Paron, S. Ortega, M. Astort, A. Rubio, M. Fariña, C. |
| author_sort |
Paron, S. |
| title |
Studying the molecular ambient towards the young stellar object EGO G35.04-0.47 |
| title_short |
Studying the molecular ambient towards the young stellar object EGO G35.04-0.47 |
| title_full |
Studying the molecular ambient towards the young stellar object EGO G35.04-0.47 |
| title_fullStr |
Studying the molecular ambient towards the young stellar object EGO G35.04-0.47 |
| title_full_unstemmed |
Studying the molecular ambient towards the young stellar object EGO G35.04-0.47 |
| title_sort |
studying the molecular ambient towards the young stellar object ego g35.04-0.47 |
| url |
http://hdl.handle.net/20.500.12110/paper_00046264_v66_n1_p_Paron |
| work_keys_str_mv |
AT parons studyingthemolecularambienttowardstheyoungstellarobjectegog3504047 AT ortegam studyingthemolecularambienttowardstheyoungstellarobjectegog3504047 AT astorta studyingthemolecularambienttowardstheyoungstellarobjectegog3504047 AT rubiom studyingthemolecularambienttowardstheyoungstellarobjectegog3504047 AT farinac studyingthemolecularambienttowardstheyoungstellarobjectegog3504047 |
| _version_ |
1807314938815840256 |