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 time-series photometric and spectroscopic data for seven oldnovae. They are used to derive the orbital period for the systems V365 Car(5.35 h), AR Cir (5.14 h), V972 Oph (6.75 h), HS Pup (6.41 h), V373 Sct (3.69h), V909 Sgr (3.43 h) and CN Vel (5.29 h). Their addition increases the numberof orbital periods for novae by ~10 per cent. The eclipsing nature of V909 Sgris confirmed, and in three other cases (V365 Car, Ar Cir and V373 Sct) wedetect significant photometric orbital variability with amplitudes >=0.2 mag inR. The resulting period distribution is briefly discussed. We furthermoreprovide new measurements for the previously ambiguous coordinates for AR Cirand CN Vel and the identification of a new probable W UMa variable in the fieldof V909 Sgr. The spectrum of V972 Oph presents an emission feature redward ofHalpha which we tentatively identify with the CII 6578/6583 doublet. It isshown that this line originates in the binary and not in a shell, and to ourknowledge this is the first time that it has been detected in such quality in acataclysmic variable (CV). We argue that this line could be more common in CVs,but that it can be easily masked by the broad Halpha emission that is typicalfor these systems. A closer inspection of the line profiles of the other novaeindeed reveals an extended red wing in V365 Car, CN Vel and AR Cir. In thelatter system additionally an absorption counterpart blueward of Halpha isdetected and thus in this case a bipolar outflow appears as a more likelyscenario rather than CII emission.

Life after eruption - III. Orbital periods of the old novae V365 Car, AR Cir, V972 Oph, HS Pup, V909 Sgr, V373 Sct and CN Vel