Pre-maximum and maximum of Novae: The spectroscopic observations of Nova ASASSN-17hx

TL;DR

This paper presents spectroscopic observations of Nova ASASSN-17hx, focusing on its pre-maximum and maximum stages, highlighting its peculiar long pre-maximum phase and secondary brightenings, which are rare in nova studies.

Contribution

It provides detailed spectroscopic analysis of a peculiar nova with an unusually long pre-maximum phase and secondary brightenings, expanding understanding of nova evolution.

Findings

Long pre-maximum phase observed in ASASSN-17hx

Detection of secondary brightenings during the nova evolution

Spectroscopic features characteristic of peculiar nova behavior

Abstract

The coverage of the pre-maximum stage of novae is sparse, with the exception of a few slow novae where the pre-maximum duration is of the order of some weeks. This paper discusses the main features of novae during the pre-maximum and the maximum stages and reports the preliminary results of an investigation of ASASSN-17hx, a peculiar nova that showed a long pre-maximum and secondary brightenings.