Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

A Luminous Red Nova in M31 and its Progenitor System

Williams, SC, Darnley, MJ, Bode, MF and Steele, IA (2015) A Luminous Red Nova in M31 and its Progenitor System. Astrophysical Journal Letters, 805 (2). ISSN 2041-8205

This is the latest version of this item.

[img] Text
1504.07747v1.pdf - Accepted Version

Download (505kB)
Erratum
Preview
Text (Erratum)
Erratum A Luminous Red Nova in M31 and its Progenitor System.pdf - Published Version

Download (128kB) | Preview

Abstract

We present observations of M31LRN 2015 (MASTER OT J004207.99+405501.1), discovered in M31 in January 2015, and identified as a rare and enigmatic luminous red nova (LRN). Spectroscopic and photometric observations obtained by the Liverpool Telescope showed the LRN becoming extremely red as it faded from its M(V) = -9.4 +/- 0.2 peak. Early spectra showed strong Halpha emission that weakened over time as a number of absorption features appeared, including Na I D and Ba II. At later times strong TiO absorption bands were also seen. A search of archival Hubble Space Telescope data revealed a luminous red source to be the likely progenitor system, with pre-outburst Halpha emission also detected in ground-based data. The outburst of M31LRN 2015 shows many similarities, both spectroscopically and photometrically, with that of V838 Mon, the best studied LRN. We finally discuss the possible progenitor scenarios.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society; IOP Publishing
Related URLs:
Date Deposited: 22 Oct 2015 13:32
Last Modified: 04 Sep 2021 13:57
DOI or ID number: 10.1088/2041-8205/805/2/L18
URI: https://researchonline.ljmu.ac.uk/id/eprint/2057

Available Versions of this Item

View Item View Item