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Title: A hyper-runaway white dwarf in Gaia DR2 as a Type Iax supernova primary remnant candidate

Abstract

ABSTRACT Observations of stellar remnants linked to Type Ia and Type Iax supernovae are necessary to fully understand their progenitors. Multiple progenitor scenarios predict a population of kicked donor remnants and partially burnt primary remnants, both moving with relatively high velocity. But only a handful of examples consistent with these two predicted populations have been observed. Here we report the likely first known example of an unbound white dwarf that is consistent with being the fully cooled primary remnant to a Type Iax supernova. The candidate, LP 93-21, is travelling with a galactocentric velocity of $$v_{\textrm {gal}} \simeq 605\, {\rm km}\, {\rm s}^{-1}$$, and is gravitationally unbound to the Milky Way. We rule out an extragalactic origin. The Type Iax supernova ejection scenario is consistent with its peculiar unbound trajectory, given anomalous elemental abundances are detected in its photosphere via spectroscopic follow-up. This discovery reflects recent models that suggest stellar ejections likely occur often. Unfortunately the intrinsic faintness of white dwarfs, and the uncertainty associated with their direct progenitor systems, makes it difficult to detect and confirm such donors.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  1. School of Physics and Astronomy, Monash University, Victoria 3800, Australia
  2. School of Physics and Astronomy, Monash University, Victoria 3800, Australia, Faculty of Information Technology, Monash University, Victoria 3800, Australia
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1560909
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 489 Journal Issue: 1; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Ruffini, Nicholas J., and Casey, Andrew R. A hyper-runaway white dwarf in Gaia DR2 as a Type Iax supernova primary remnant candidate. United Kingdom: N. p., 2019. Web. doi:10.1093/mnras/stz2176.
Ruffini, Nicholas J., & Casey, Andrew R. A hyper-runaway white dwarf in Gaia DR2 as a Type Iax supernova primary remnant candidate. United Kingdom. doi:10.1093/mnras/stz2176.
Ruffini, Nicholas J., and Casey, Andrew R. Fri . "A hyper-runaway white dwarf in Gaia DR2 as a Type Iax supernova primary remnant candidate". United Kingdom. doi:10.1093/mnras/stz2176.
@article{osti_1560909,
title = {A hyper-runaway white dwarf in Gaia DR2 as a Type Iax supernova primary remnant candidate},
author = {Ruffini, Nicholas J. and Casey, Andrew R.},
abstractNote = {ABSTRACT Observations of stellar remnants linked to Type Ia and Type Iax supernovae are necessary to fully understand their progenitors. Multiple progenitor scenarios predict a population of kicked donor remnants and partially burnt primary remnants, both moving with relatively high velocity. But only a handful of examples consistent with these two predicted populations have been observed. Here we report the likely first known example of an unbound white dwarf that is consistent with being the fully cooled primary remnant to a Type Iax supernova. The candidate, LP 93-21, is travelling with a galactocentric velocity of $v_{\textrm {gal}} \simeq 605\, {\rm km}\, {\rm s}^{-1}$, and is gravitationally unbound to the Milky Way. We rule out an extragalactic origin. The Type Iax supernova ejection scenario is consistent with its peculiar unbound trajectory, given anomalous elemental abundances are detected in its photosphere via spectroscopic follow-up. This discovery reflects recent models that suggest stellar ejections likely occur often. Unfortunately the intrinsic faintness of white dwarfs, and the uncertainty associated with their direct progenitor systems, makes it difficult to detect and confirm such donors.},
doi = {10.1093/mnras/stz2176},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 1,
volume = 489,
place = {United Kingdom},
year = {2019},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
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DOI: 10.1093/mnras/stz2176

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Cited by: 2 works
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Works referenced in this record:

Wait for it: Post-Supernova Winds Driven by Delayed Radioactive Decays
journal, January 2017


Double white dwarfs as progenitors of R Coronae Borealis stars and Type I supernovae
journal, February 1984

  • Webbink, R. F.
  • The Astrophysical Journal, Vol. 277
  • DOI: 10.1086/161701

Further degenerate stars. X
journal, November 1977

  • Greenstein, J. L.; Oke, J. B.; Richstone, D.
  • The Astrophysical Journal, Vol. 218
  • DOI: 10.1086/182568

Type Ia Supernovae and High‐Velocity White Dwarfs
journal, January 2003

  • Hansen, Brad M. S.
  • The Astrophysical Journal, Vol. 582, Issue 2
  • DOI: 10.1086/344782

The Structure of Cold Dark Matter Halos
journal, May 1996

  • Navarro, Julio F.; Frenk, Carlos S.; White, Simon D. M.
  • The Astrophysical Journal, Vol. 462
  • DOI: 10.1086/177173

EVOLUTION OF POST-IMPACT COMPANION STARS IN SN Ia REMNANTS WITHIN THE SINGLE-DEGENERATE SCENARIO
journal, October 2012


Type Ia supernovae and the formation of single low-mass white dwarfs
journal, November 2008


The response of a helium white dwarf to an exploding Type Ia supernova
journal, March 2015

  • Papish, Oded; Soker, Noam; García–Berro, Enrique
  • Monthly Notices of the Royal Astronomical Society, Vol. 449, Issue 1
  • DOI: 10.1093/mnras/stv337

Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
journal, June 2017

  • Blanton, Michael R.; Bershady, Matthew A.; Abolfathi, Bela
  • The Astronomical Journal, Vol. 154, Issue 1
  • DOI: 10.3847/1538-3881/aa7567

Gaia Data Release 2 : Summary of the contents and survey properties
journal, August 2018


Gaia Data Release 2 : The astrometric solution
journal, August 2018


Sub-Chandrasekhar-mass White Dwarf Detonations Revisited
journal, February 2018

  • Shen, Ken J.; Kasen, Daniel; Miles, Broxton J.
  • The Astrophysical Journal, Vol. 854, Issue 1
  • DOI: 10.3847/1538-4357/aaa8de

NORMAL TYPE Ia SUPERNOVAE FROM VIOLENT MERGERS OF WHITE DWARF BINARIES
journal, February 2012


Three-dimensional pure deflagration models with nucleosynthesis and synthetic observables for Type Ia supernovae
journal, December 2013

  • Fink, Michael; Kromer, Markus; Seitenzahl, Ivo R.
  • Monthly Notices of the Royal Astronomical Society, Vol. 438, Issue 2
  • DOI: 10.1093/mnras/stt2315

Gaia Data Release 2 : Using
journal, August 2018


On the Interpretation of High‐Velocity White Dwarfs as Members of the Galactic Halo
journal, June 2005

  • Bergeron, P.; Ruiz, Maria Teresa; Hamuy, M.
  • The Astrophysical Journal, Vol. 625, Issue 2
  • DOI: 10.1086/429715

Progenitors of type Ia supernovae
journal, June 2012


Rotation of surviving companion stars after type Ia supernova explosions in the WD+MS scenario
journal, June 2013


The double-degenerate model for the progenitors of Type Ia supernovae
journal, October 2017

  • Liu, D.; Wang, B.; Han, Z.
  • Monthly Notices of the Royal Astronomical Society, Vol. 473, Issue 4
  • DOI: 10.1093/mnras/stx2756

Direct Detection of Galactic Halo Dark Matter
journal, March 2001


Gala: A Python package for galactic dynamics
journal, October 2017

  • M. Price-Whelan, Adrian
  • The Journal of Open Source Software, Vol. 2, Issue 18
  • DOI: 10.21105/joss.00388

Trigonometric parallaxes of high velocity halo white dwarf candidates
journal, April 2007


Supernovae of type I as end products of the evolution of binaries with components of moderate initial mass (M not greater than about 9 solar masses)
journal, January 1984

  • Iben, I. , Jr.; Tutukov, A. V.
  • The Astrophysical Journal Supplement Series, Vol. 54
  • DOI: 10.1086/190932

Three Hypervelocity White Dwarfs in Gaia DR2: Evidence for Dynamically Driven Double-degenerate Double-detonation Type Ia Supernovae
journal, September 2018

  • Shen, Ken J.; Boubert, Douglas; Gänsicke, Boris T.
  • The Astrophysical Journal, Vol. 865, Issue 1
  • DOI: 10.3847/1538-4357/aad55b

THE IMPACT OF TYPE Ia SUPERNOVA EXPLOSIONS ON HELIUM COMPANIONS IN THE CHANDRASEKHAR-MASS EXPLOSION SCENARIO
journal, August 2013


A Critical Examination of Halo White Dwarf Candidates
journal, March 2003

  • Bergeron, P.
  • The Astrophysical Journal, Vol. 586, Issue 1
  • DOI: 10.1086/367618

Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
journal, September 1998

  • Riess, Adam G.; Filippenko, Alexei V.; Challis, Peter
  • The Astronomical Journal, Vol. 116, Issue 3
  • DOI: 10.1086/300499

Companion stars of type Ia supernovae and hypervelocity stars
journal, November 2009


Runaway stars as progenitors of supernovae and gamma-ray bursts: Runaway stars as progenitors of SNe and GRBs
journal, May 2011

  • Eldridge, John J.; Langer, Norbert; Tout, Christopher A.
  • Monthly Notices of the Royal Astronomical Society, Vol. 414, Issue 4
  • DOI: 10.1111/j.1365-2966.2011.18650.x

Updated Nearby Galaxy Catalog
journal, March 2013

  • Karachentsev, Igor D.; Makarov, Dmitry I.; Kaisina, Elena I.
  • The Astronomical Journal, Vol. 145, Issue 4
  • DOI: 10.1088/0004-6256/145/4/101

He-accreting carbon–oxygen white dwarfs and Type Ia supernovae
journal, August 2017

  • Wang, Bo; Podsiadlowski, Philipp; Han, Zhanwen
  • Monthly Notices of the Royal Astronomical Society, Vol. 472, Issue 2
  • DOI: 10.1093/mnras/stx2192

Type Ia Supernovae: Their Origin and Possible Applications in Cosmology
journal, May 1997


Three-dimensional simulations of the interaction between Type Ia supernova ejecta and their main sequence companions
journal, November 2012


Astropy: A community Python package for astronomy
journal, September 2013


IMPACT OF TYPE Ia SUPERNOVA EJECTA ON BINARY COMPANIONS IN THE SINGLE-DEGENERATE SCENARIO
journal, April 2012


TYPE Iax SUPERNOVAE: A NEW CLASS OF STELLAR EXPLOSION
journal, March 2013


Distant White Dwarfs in the US Naval Observatory Flagstaff Station Parallax Sample
journal, December 2018

  • Leggett, S. K.; Bergeron, P.; Subasavage, John P.
  • The Astrophysical Journal Supplement Series, Vol. 239, Issue 2
  • DOI: 10.3847/1538-4365/aae7ca

Accreting white dwarf models for type I supernovae. I - Presupernova evolution and triggering mechanisms
journal, February 1982


Helium-accreting degenerate dwarfs as presupernovae and scenarios for the ultrasoft x-ray sources
journal, August 1994

  • Iben, Icko, Jr.; Tutukov, A. V.
  • The Astrophysical Journal, Vol. 431
  • DOI: 10.1086/174484

Enhanced anti-ablation performance of carbon/carbon composites modified with ZrC-SiC
journal, October 2018


White dwarf mass distribution in the SDSS: White dwarf mass distribution in the SDSS
journal, February 2007


galpy: A python LIBRARY FOR GALACTIC DYNAMICS
journal, February 2015


Mass-accreting white dwarfs and type Ia supernovae
journal, May 2018


The Gaia mission
journal, November 2016


A Catalog of Spectroscopically Identified White Dwarfs
journal, March 1999

  • McCook, George P.; Sion, Edward M.
  • The Astrophysical Journal Supplement Series, Vol. 121, Issue 1
  • DOI: 10.1086/313186

An analytical model for spherical galaxies and bulges
journal, June 1990

  • Hernquist, Lars
  • The Astrophysical Journal, Vol. 356
  • DOI: 10.1086/168845

The age of the Galactic stellar halo from Gaia white dwarfs
journal, October 2018

  • Kilic, Mukremin; Bergeron, P.; Dame, Kyra
  • Monthly Notices of the Royal Astronomical Society, Vol. 482, Issue 1
  • DOI: 10.1093/mnras/sty2755

THE MILKY WAY'S CIRCULAR-VELOCITY CURVE BETWEEN 4 AND 14 kpc FROM APOGEE DATA
journal, October 2012


The Properties of Dynamically Ejected Runaway and Hyper-Runaway Stars
journal, May 2012


US 708 – an unbound hyper-velocity subluminous O star
journal, December 2005


FAILED-DETONATION SUPERNOVAE: SUBLUMINOUS LOW-VELOCITY Ia SUPERNOVAE AND THEIR KICKED REMNANT WHITE DWARFS WITH IRON-RICH CORES
journal, December 2012


Deflagrations in hybrid CONe white dwarfs: a route to explain the faint Type Iax supernova 2008ha
journal, May 2015

  • Kromer, M.; Ohlmann, S. T.; Pakmor, R.
  • Monthly Notices of the Royal Astronomical Society, Vol. 450, Issue 3
  • DOI: 10.1093/mnras/stv886

3D deflagration simulations leaving bound remnants: a model for 2002cx-like Type Ia supernovae★
journal, December 2012

  • Kromer, M.; Fink, M.; Stanishev, V.
  • Monthly Notices of the Royal Astronomical Society, Vol. 429, Issue 3
  • DOI: 10.1093/mnras/sts498

Solar abundance of manganese: a case for near Chandrasekhar-mass Type Ia supernova progenitors
journal, November 2013


Sdss dr7 White Dwarf Catalog
journal, December 2012

  • Kleinman, S. J.; Kepler, S. O.; Koester, D.
  • The Astrophysical Journal Supplement Series, Vol. 204, Issue 1
  • DOI: 10.1088/0067-0049/204/1/5

Binaries and Supernovae of Type I
journal, December 1973

  • Whelan, John; Iben, Icko, Jr.
  • The Astrophysical Journal, Vol. 186
  • DOI: 10.1086/152565

The Long-term Evolution and Appearance of Type Iax Postgenitor Stars
journal, February 2019

  • Zhang, Michael; Fuller, Jim; Schwab, Josiah
  • The Astrophysical Journal, Vol. 872, Issue 1
  • DOI: 10.3847/1538-4357/aafb34

Matplotlib: A 2D Graphics Environment
journal, January 2007


Maximum speed of hypervelocity stars ejected from binaries
journal, December 2014

  • Tauris, Thomas M.
  • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 448, Issue 1
  • DOI: 10.1093/mnrasl/slu189

Measurements of Ω and Λ from 42 High‐Redshift Supernovae
journal, June 1999

  • Perlmutter, S.; Aldering, G.; Goldhaber, G.
  • The Astrophysical Journal, Vol. 517, Issue 2
  • DOI: 10.1086/307221

The NumPy Array: A Structure for Efficient Numerical Computation
journal, March 2011

  • van der Walt, Stéfan; Colbert, S. Chris; Varoquaux, Gaël
  • Computing in Science & Engineering, Vol. 13, Issue 2
  • DOI: 10.1109/MCSE.2011.37

The Circular Velocity Curve of the Milky Way from 5 to 25 kpc
journal, January 2019

  • Eilers, Anna-Christina; Hogg, David W.; Rix, Hans-Walter
  • The Astrophysical Journal, Vol. 871, Issue 1
  • DOI: 10.3847/1538-4357/aaf648

Three-dimensional Simulation of Double Detonations in the Double-degenerate Model for Type Ia Supernovae and Interaction of Ejecta with a Surviving White Dwarf Companion
journal, November 2018

  • Tanikawa, Ataru; Nomoto, Ken’ichi; Nakasato, Naohito
  • The Astrophysical Journal, Vol. 868, Issue 2
  • DOI: 10.3847/1538-4357/aae9ee

Estimating Distance from Parallaxes. IV. Distances to 1.33 Billion Stars in Gaia Data Release 2
journal, July 2018

  • Bailer-Jones, C. A. L.; Rybizki, J.; Fouesneau, M.
  • The Astronomical Journal, Vol. 156, Issue 2
  • DOI: 10.3847/1538-3881/aacb21

Evolution of Helium Star–White Dwarf Binaries Leading up to Thermonuclear Supernovae
journal, June 2019


3D kinematics of white dwarfs from the SPY project. II.
journal, January 2006


Anatomy of the hyper-runaway star LP 40–365 with Gaia
journal, June 2018

  • Raddi, R.; Hollands, M. A.; Gänsicke, B. T.
  • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 479, Issue 1
  • DOI: 10.1093/mnrasl/sly103