The orbital period of the nova V1674 Her as observed with TESS

TL;DR

This paper reports the detection of the orbital period of Nova Her 2021 using TESS data, revealing a stable orbital period and an additional modulation, contributing to understanding the system's dynamics post-outburst.

Contribution

First detection of the orbital period of Nova Her 2021 with TESS, providing insights into its post-outburst behavior and additional modulation phenomena.

Findings

Orbital period of 0.1529 days detected 17 days after outburst

Presence of a 0.537-day modulation in the data

Orbital period remains stable during observations

Abstract

Nova Her 2021 was observed with TESS 12.62 days after its most recent outburst in June 12.537 2021. This cataclysmic variable belongs to the intermediate polar class, with an spin period of $\sim$501 s and orbital period of 0.1529 days. During TESS observations of Sector 40, the orbital period of 0.1529(1) days is detected significantly 17 days after the onset of the outburst. A modulation, of unknown origin, with a period of $\sim$0.537 days is present in the data from day 13 until day 17.