| Title |
Discrete sources as the origin of the Galactic X-ray ridge emission
|
|---|---|
| Published in |
Nature, April 2009
|
| DOI | 10.1038/nature07946 |
| Pubmed ID | |
| Authors |
M. Revnivtsev, S. Sazonov, E. Churazov, W. Forman, A. Vikhlinin, R. Sunyaev |
| Abstract |
An unresolved X-ray glow (at energies above a few kiloelectronvolts) was discovered about 25 years ago and found to be coincident with the Galactic disk-the Galactic ridge X-ray emission. This emission has a spectrum characteristic of a approximately 10(8) K optically thin thermal plasma, with a prominent iron emission line at 6.7 keV. The gravitational well of the Galactic disk, however, is far too shallow to confine such a hot interstellar medium; instead, it would flow away at a velocity of a few thousand kilometres per second, exceeding the speed of sound in the gas. To replenish the energy losses requires a source of 10(43) erg s(-1), exceeding by orders of magnitude all plausible energy sources in the Milky Way. An alternative is that the hot plasma is bound to a multitude of faint sources, which is supported by the recently observed similarities in the X-ray and near-infrared surface brightness distributions (the latter traces the Galactic stellar distribution). Here we report that at energies of approximately 6-7 keV, more than 80 per cent of the seemingly diffuse X-ray emission is resolved into discrete sources, probably accreting white dwarfs and coronally active stars. |
X Demographics
The data shown below were collected from the profiles of 3 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Japan | 2 | 67% |
| Unknown | 1 | 33% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 3 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 49 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 2% |
| China | 1 | 2% |
| France | 1 | 2% |
| Unknown | 46 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 15 | 31% |
| Student > Ph. D. Student | 13 | 27% |
| Student > Master | 4 | 8% |
| Student > Doctoral Student | 3 | 6% |
| Student > Bachelor | 2 | 4% |
| Other | 5 | 10% |
| Unknown | 7 | 14% |
| Readers by discipline | Count | As % |
|---|---|---|
| Physics and Astronomy | 38 | 78% |
| Medicine and Dentistry | 2 | 4% |
| Social Sciences | 1 | 2% |
| Agricultural and Biological Sciences | 1 | 2% |
| Unknown | 7 | 14% |
Attention Score in Context
This research output has an Altmetric Attention Score of 13. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 30 June 2023.
All research outputs
#2,331,364
of 22,669,724 outputs
Outputs from Nature
#43,468
of 90,616 outputs
Outputs of similar age
#7,685
of 93,918 outputs
Outputs of similar age from Nature
#194
of 522 outputs
Altmetric has tracked 22,669,724 research outputs across all sources so far. Compared to these this one has done well and is in the 89th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 90,616 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 99.2. This one has gotten more attention than average, scoring higher than 52% of its peers.
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We're also able to compare this research output to 522 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 62% of its contemporaries.