Followup Observations of SDSS and CRTS Candidate Cataclysmic Variables II

TL;DR

This study presents spectral observations of 38 candidate and known cataclysmic variables, confirming classifications, determining orbital periods, and identifying magnetic and eclipsing systems, enhancing understanding of their diverse behaviors.

Contribution

It provides new spectral data, confirms classifications, and reports orbital periods for several cataclysmic variables, including the identification of magnetic and eclipsing systems.

Findings

Confirmed four objects as polars.

Identified an eclipsing SW Sex star below the period gap.

Discovered a likely intermediate polar and two dwarf novae in the middle of the period gap.

Abstract

Spectra of 38 candidate or known cataclysmic variables are presented. Most are candidate dwarf novae or systems containing possible highly magnetic white dwarfs, while a few (KR Aur, LS Peg, V380 Oph and V694 Mon) are previously known objects caught in unusual states. Individual spectra are used to confirm a dwarf nova nature or other classification while radial velocities of 15 systems provide orbital periods and velocity amplitudes that aid in determining the nature of the objects. Our results substantiate a polar nature for four objects, find an eclipsing SW Sex star below the period gap, another as a likely intermediate polar, as well as two dwarf novae with periods in the middle of the gap.