Variable, circularly polarized radio emission from the Young Stellar Object [BHB2007]-1: another ingredient of a unique system
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866913558875340800 |
|---|---|
| author | Kaur, Simranpreet Girart, Josep M. Viganò, Daniele Monge, Álvaro Sánchez Cleeves, L. Ilsedore Zurlo, Alice Del Sordo, Fabio Morata, Òscar Bhowmik, Trisha Alves, Felipe O. |
| author_facet | Kaur, Simranpreet Girart, Josep M. Viganò, Daniele Monge, Álvaro Sánchez Cleeves, L. Ilsedore Zurlo, Alice Del Sordo, Fabio Morata, Òscar Bhowmik, Trisha Alves, Felipe O. |
| contents | The young stellar object [BHB2007]-1 has been extensively studied in the past at radio, millimeter, and infrared wavelengths. It shows a gap in the disk and previous observations claimed the possible emission from a forming sub-stellar object, in correspondence to the disk gap. Here, we analyze a set of 8 Karl Jansky Very Large Array (VLA) observations at 15 GHz and spread over a month. We infer a slowly variable emission from the star, with a $\sim 15 \text{-} 20\%$ circular polarization detected in two of the eight observations. The latter can be related to the magnetic fields in the system, while the unpolarized and moderately varying component can be indicative of free-free emission associated with jet induced shocks or interaction of the stellar wind with dense surrounding material. We discard any relevant short flaring activities when sampling the radio light curves down to 10 seconds and find no clear evidence of emission from the sub-stellar object inferred from past observations, although deeper observations could shed further light on this. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_04025 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Variable, circularly polarized radio emission from the Young Stellar Object [BHB2007]-1: another ingredient of a unique system Kaur, Simranpreet Girart, Josep M. Viganò, Daniele Monge, Álvaro Sánchez Cleeves, L. Ilsedore Zurlo, Alice Del Sordo, Fabio Morata, Òscar Bhowmik, Trisha Alves, Felipe O. Solar and Stellar Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena The young stellar object [BHB2007]-1 has been extensively studied in the past at radio, millimeter, and infrared wavelengths. It shows a gap in the disk and previous observations claimed the possible emission from a forming sub-stellar object, in correspondence to the disk gap. Here, we analyze a set of 8 Karl Jansky Very Large Array (VLA) observations at 15 GHz and spread over a month. We infer a slowly variable emission from the star, with a $\sim 15 \text{-} 20\%$ circular polarization detected in two of the eight observations. The latter can be related to the magnetic fields in the system, while the unpolarized and moderately varying component can be indicative of free-free emission associated with jet induced shocks or interaction of the stellar wind with dense surrounding material. We discard any relevant short flaring activities when sampling the radio light curves down to 10 seconds and find no clear evidence of emission from the sub-stellar object inferred from past observations, although deeper observations could shed further light on this. |
| title | Variable, circularly polarized radio emission from the Young Stellar Object [BHB2007]-1: another ingredient of a unique system |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2408.04025 |