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http://hdl.handle.net/2289/6921Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Sarkar, Kartick Chandra | - |
| dc.contributor.author | Nath, Biman B. | - |
| dc.contributor.author | Sharma, Prateek | - |
| dc.date.accessioned | 2018-06-03T19:02:57Z | - |
| dc.date.available | 2018-06-03T19:02:57Z | - |
| dc.date.issued | 2017-06 | - |
| dc.identifier.citation | Monthly Notices of the Royal Astronomical Society, 2017, Vol. 467, p3544-3555 | en_US |
| dc.identifier.issn | 0035-8711 | - |
| dc.identifier.issn | 1365-2966 (Online) | - |
| dc.identifier.uri | http://hdl.handle.net/2289/6921 | - |
| dc.description | Open access | en_US |
| dc.description.abstract | We constrain the origin of Fermi bubbles using 2D hydrodynamical simulations of both star formation-driven and black hole accretion-driven wind models. We compare our results with recent observations of O viii to O vii line ratio within and near Fermi bubbles. Our results suggest that independent of the driving mechanisms, a low-luminosity ( L∼0.7--1×1041 erg s−1) energy injection best reproduces the observed line ratio for which the shock temperature is ≈3 × 106 K. Assuming the Galactic halo temperature to be 2 × 106 K, we estimate the shock velocity to be ∼300 km s−1 for a weak shock. The corresponding estimated age of the Fermi bubbles is ∼15–25 Myr. Such an event can be produced either by a star formation rate of ∼0.5 M⊙ yr−1 at the Galactic Centre or a very low-luminosity jet/accretion wind arising from the central black hole. Our analysis rules out any activity that generates an average mechanical luminosity ≳1041 erg s−1 as a possible origin of the Fermi bubbles. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Oxford University Press for the Royal Astronomical Society | en_US |
| dc.relation.uri | http://adsabs.harvard.edu/abs/2017MNRAS.467.3544S | en_US |
| dc.relation.uri | https://arxiv.org/abs/1610.00719 | en_US |
| dc.relation.uri | http://dx.doi.org/10.1093/mnras/stx314 | en_US |
| dc.rights | 2017 The authors & the Royal Astronomical Society | en_US |
| dc.subject | ISM bubbles | en_US |
| dc.subject | star formation | en_US |
| dc.title | Clues to the origin of Fermi bubbles from O viii/O vii line ratio | en_US |
| dc.type | Article | en_US |
| Appears in Collections: | Research Papers (A&A) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2017_MNRAS_467_3544.pdf Restricted Access | Open Access | 3.74 MB | Adobe PDF | View/Open Request a copy |
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