English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present the results of an optical search for supernova remnants (SNRs) inthe nearby spiral galaxy NGC 2903. Interference filter images and spectral datawere taken in March 2005 with the f/7.7 1.5 m Russian Turkish Telescope(RTT150) at TUBITAK National Observatory (TUG). Spectral data were obtainedwith the 6 m BTA (Bolshoi Azimuthal Telescope, Russia). We used the SNRidentification criterion that consists of constructing the continuum-subtractedH$\alpha$ and continuum-subtracted [SII]$\lambda$$\lambda$6716,6731 images andtheir ratios. Five SNR candidates were identified in NGC 2903 with[SII]/H$\alpha$ ratios ranging from 0.41 - 0.74 and H$\alpha$ intensitiesranging from 9.4$\times10^{-15}$ to 1.7$\times10^{-14}$ ergs cm$^{-2}$s$^{-1}$. This work represents the first identification of SNRs by an opticalsurvey in NGC 2903. We present the spectrum of one of the bright candidates andderive an [SII]/H$\alpha$ emission line ratio of 0.42 for this source. Inaddition, the weak [OIII]$\lambda$5007/H$\beta$ emission line ratio in thespectrum of this SNR indicates an old oxygen-deficient remnant with a lowpropagation velocity.

An optical search for supernova remnants in the nearby spiral galaxy NGC 2903