The New Eclipsing Cataclysmic Variable SDSS 154453+2553

TL;DR

This paper reports the discovery and detailed analysis of the eclipsing cataclysmic variable SDSS 154453+2553, including its orbital characteristics, spectral features, and the properties of its companion star.

Contribution

It provides the first spectroscopic and photometric characterization of SDSS 154453+2553, revealing its orbital period, accretion disk features, and secondary star properties.

Findings

Orbital period of 6.03 hours determined.

Strong Hα emission from accretion disk observed.

Secondary star estimated at 800 ± 180 pc distance.

Abstract

The cataclysmic variable SDSS154453+2553 was recently identified in the Sloan Digital Sky Survey. We obtained spectra and photometry at the MDM Observatory, which revealed an eclipse with a 6.03 hour period. The H{\alpha} emission line exhibits a strong rotational disturbance during eclipse, indicating that it arises in an accretion disk. A contribution from an M-type companion is also observed. Time-series photometry during eclipse gives an ephemeris of 2454878.0062(15) + 0.251282(2)E. We present spectroscopy through the orbit and eclipse photometry. Our analysis of the secondary star indicates a distance of 800 {\pm} 180 pc.