Nature research paper: A repeating fast radio burst co-located with a persistent radio source and associated with a dwarf host galaxy of high specific-star-formation rate
gives the chance of coincident association of the PRS with the FRB position to be about 3 × 10The deep R′-band images obtained by CFHT/MegaCam were stacked from archival observation data taken in 2014–2015 by the Canada France Hawaii Telescope archival pipeline MEGAPIPE, with a total of about 3.6 h on the field. The level 3 images were retrieved for our analysis.
NIR J-band images of the FRB–20190520B field were taken under a relatively poor seeing condition through a Subaru target-of-opportunity observation on 5 August 2020. A total of 1.4 h of observations were used for the final combined J-band image shown in Fig.. A J-band source of 22.07 ± 0.14 mag was detected at about 1″ southeast of the burst location, and is possibly stellar emission from the host galaxy. A faint source 2.5″ north has 22.87 ± 0.26 mag in the J band.
. The slit was guided by the nearby M-star at RA = 16 h 02 min 04.48 s, dec. = −11° 17′ 19.1″ as reported in the PanSTARRS DR1 catalogue, with= 20.4 mag, and 3.4″ due east of the PRS coordinates. The slit was set to a position angle of 108.5°, ensuring that both the PRS and the M-star fell within the slit. The observations with 2 × 900 s exposures were carried out under photometric sky conditions and subarcsecond seeing.
. The flux scale of the spectrum does not include the slit loss and registration error of PanSTARRS coordinates of the M-type star. The [O] 5,007 Å line and the Hα line are both well detected . The two emission lines are narrow, each with a full-width at half-maximum of about 10 Å. The redshift derived from these two spectral lines isA follow-up Keck LRIS spectroscopic observation was carried out on 25 August 2020 under reasonable weather and seeing conditions . The 1.
to estimate the chance coincidence probability of the association between the galaxy and FRB 20190520B. Assuming a uniform surface distribution of galaxies, the probability of chance coincidence follows a Poisson distribution; that is,is the mean number density of galaxies brighter than a specified R′-band magnitude in a circle of given radius, determined by the half light radius of the galaxy and the burst localization error region. This number density is estimated using the results from ref..
United States Latest News, United States Headlines
Similar News:You can also read news stories similar to this one that we have collected from other news sources.
Genome evolution and diversity of wild and cultivated potatoes - NatureHigh-quality diploid assemblies of potato genomes from 24 wild and 20 cultivated potatoes provide insights into the complex evolution and diversity of potatoes, and could have applications in the breeding of hybrid potatoes.
Read more »
Targeting thalamic circuits rescues motor and mood deficits in PD mice - NatureNature research paper: In a mouse model of Parkinson's Disease, targeting thalamic circuits rescues motor and mood deficits
Read more »
Synonymous mutations in representative yeast genes are mostly strongly non-neutral - NatureA survey of 8,341 mutations in 21 yeast genes shows that synonymous mutations are nearly as harmful as nonsynonymous mutations, in part because they both affect the mRNA level of the gene mutated.
Read more »
Multilevel polarization switching in ferroelectric thin films - Nature CommunicationsSetting any polarization value in ferroelectric thin films is a key step for their implementation in neuromorphic devices. Here, the authors demonstrate continuous modulation of the remanent polarization at the nanoscale in PbZr0.52Ti0.48O3 films.
Read more »
Sub-aerial talik formation observed across the discontinuous permafrost zone of Alaska - Nature GeoscienceTemperature observations from across Alaska show widespread talik formation in the discontinuous permafrost zone due to higher air temperatures and above-average snowfall in recent years.
Read more »
The renal lineage factor PAX8 controls oncogenic signalling in kidney cancer - NatureThe lineage transcription factor PAX8 is shown to play a pivotal part in determining cancer risk in clear cell renal cell carcinoma, providing insights into how genetic mutations lead to specific types of cancer.
Read more »