Free Access

Fig. 5.

image

Top: SN 2018bsz optical-wavelength spectra obtained at eight days prior to maximum light, three days after maximum light, and one week post maximum. The positions of host H II region emission lines (not associated with the SN) are indicated as dashed blue vertical lines, while narrow absorption from Milky-Way Na I D absorption is shown as a dashed yellow line (and a zoom also showing such absorption within the host is presented in the bottom panel). C II line rest wavelengths are indicated by grey vertical lines, while the position of both the peaks and the troughs of the O II features is shown in red. We also identify relatively narrow emission features in the absorption troughs of C II, that we label as “High Velocity, HV” features. Narrow calcium H + K absorption from within the host galaxy is also observed. Bottom: a zoom of the spectral region between 5800 Å and 6150 Å as seen in the X-shooter spectrum (three days post maximum). The latter shows the clear detection of sodium absorption within the host galaxy of SN 2018bsz, together with the strong MW sodium absorption.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.