The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458
Autor(a) principal: | |
---|---|
Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/254155 |
Resumo: | Double white dwarf (DWD) mergers are possibly the leading formation channel of massive, rapidly rotating, highfield magnetic white dwarfs (HFMWDs). However, a direct link connecting a DWD merger to any observed HFMWD is still missing. We here show that the HFMWDs SDSS J221141.80+113604.4 (hereafter J2211+1136) and ZTF J190132.9+145808.7 (hereafter J1901+1458) might be DWD merger products. J2211+1136 is a 1.27 Me white dwarf (WD) with a rotation period of 70.32 s and a surface magnetic field of 15 MG. J1901+1458 is a 1.327–1.365 Me WD with a rotation period of 416.20 s, and a surface magnetic field in the range 600–900 MG. With the assumption of single-star evolution and the currently measured WD masses and surface temperatures, the cooling ages of J2211+1136 and J1901+1458 are, respectively, 2.61–2.85 Gyr and 10–100 Myr. We hypothesize that these WDs are DWD merger products and compute the evolution of the postmerged configuration formed by a central WD surrounded by a disk. We show that the postmerger system evolves through three phases depending on whether accretion, mass ejection (propeller), or magnetic braking dominates the torque onto the central WD. We calculate the time the WD spends in each of these phases and obtain the accretion rate and disk mass for which the WD rotational age, i.e., the total time elapsed since the merger to the instant where the WD central remnant reaches the current measured rotation period, agrees with the estimated WD cooling age. We infer the mass values of the primary and secondary WD components of the DWD merger that lead to a postmerger evolution consistent with the observations. |
id |
UFRGS-2_e0247b30520006a5349b69d81639cda7 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/254155 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Sousa, Manoel FelipeCoelho, Jaziel GoulartAraujo, José Carlos Neves deKepler, Souza OliveiraRueda Hernández, Jorge Armando2023-02-07T05:01:25Z20220004-637Xhttp://hdl.handle.net/10183/254155001160272Double white dwarf (DWD) mergers are possibly the leading formation channel of massive, rapidly rotating, highfield magnetic white dwarfs (HFMWDs). However, a direct link connecting a DWD merger to any observed HFMWD is still missing. We here show that the HFMWDs SDSS J221141.80+113604.4 (hereafter J2211+1136) and ZTF J190132.9+145808.7 (hereafter J1901+1458) might be DWD merger products. J2211+1136 is a 1.27 Me white dwarf (WD) with a rotation period of 70.32 s and a surface magnetic field of 15 MG. J1901+1458 is a 1.327–1.365 Me WD with a rotation period of 416.20 s, and a surface magnetic field in the range 600–900 MG. With the assumption of single-star evolution and the currently measured WD masses and surface temperatures, the cooling ages of J2211+1136 and J1901+1458 are, respectively, 2.61–2.85 Gyr and 10–100 Myr. We hypothesize that these WDs are DWD merger products and compute the evolution of the postmerged configuration formed by a central WD surrounded by a disk. We show that the postmerger system evolves through three phases depending on whether accretion, mass ejection (propeller), or magnetic braking dominates the torque onto the central WD. We calculate the time the WD spends in each of these phases and obtain the accretion rate and disk mass for which the WD rotational age, i.e., the total time elapsed since the merger to the instant where the WD central remnant reaches the current measured rotation period, agrees with the estimated WD cooling age. We infer the mass values of the primary and secondary WD components of the DWD merger that lead to a postmerger evolution consistent with the observations.application/pdfengThe astrophysical journal. Bristol. Vol. 941, no. 1 (Dec. 2022), 28, 10 p.Anãs brancasFormacao de estrelasRotacao estelarStellar remnantsWhite dwarf starsStellar mergersCompact binary starsCompact objectsStellar rotationThe double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458Estrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001160272.pdf.txt001160272.pdf.txtExtracted Texttext/plain54263http://www.lume.ufrgs.br/bitstream/10183/254155/2/001160272.pdf.txt0bf10246dafffa12427399b2678bd06fMD52ORIGINAL001160272.pdfTexto completo (inglês)application/pdf891685http://www.lume.ufrgs.br/bitstream/10183/254155/1/001160272.pdfa47fcb93c5ec5808809a5eb17441eac5MD5110183/2541552023-02-08 06:01:18.257855oai:www.lume.ufrgs.br:10183/254155Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-02-08T08:01:18Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458 |
title |
The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458 |
spellingShingle |
The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458 Sousa, Manoel Felipe Anãs brancas Formacao de estrelas Rotacao estelar Stellar remnants White dwarf stars Stellar mergers Compact binary stars Compact objects Stellar rotation |
title_short |
The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458 |
title_full |
The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458 |
title_fullStr |
The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458 |
title_full_unstemmed |
The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458 |
title_sort |
The double white dwarf merger progenitors of SDSS J2211+1136 and ZTF J1901+1458 |
author |
Sousa, Manoel Felipe |
author_facet |
Sousa, Manoel Felipe Coelho, Jaziel Goulart Araujo, José Carlos Neves de Kepler, Souza Oliveira Rueda Hernández, Jorge Armando |
author_role |
author |
author2 |
Coelho, Jaziel Goulart Araujo, José Carlos Neves de Kepler, Souza Oliveira Rueda Hernández, Jorge Armando |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Sousa, Manoel Felipe Coelho, Jaziel Goulart Araujo, José Carlos Neves de Kepler, Souza Oliveira Rueda Hernández, Jorge Armando |
dc.subject.por.fl_str_mv |
Anãs brancas Formacao de estrelas Rotacao estelar |
topic |
Anãs brancas Formacao de estrelas Rotacao estelar Stellar remnants White dwarf stars Stellar mergers Compact binary stars Compact objects Stellar rotation |
dc.subject.eng.fl_str_mv |
Stellar remnants White dwarf stars Stellar mergers Compact binary stars Compact objects Stellar rotation |
description |
Double white dwarf (DWD) mergers are possibly the leading formation channel of massive, rapidly rotating, highfield magnetic white dwarfs (HFMWDs). However, a direct link connecting a DWD merger to any observed HFMWD is still missing. We here show that the HFMWDs SDSS J221141.80+113604.4 (hereafter J2211+1136) and ZTF J190132.9+145808.7 (hereafter J1901+1458) might be DWD merger products. J2211+1136 is a 1.27 Me white dwarf (WD) with a rotation period of 70.32 s and a surface magnetic field of 15 MG. J1901+1458 is a 1.327–1.365 Me WD with a rotation period of 416.20 s, and a surface magnetic field in the range 600–900 MG. With the assumption of single-star evolution and the currently measured WD masses and surface temperatures, the cooling ages of J2211+1136 and J1901+1458 are, respectively, 2.61–2.85 Gyr and 10–100 Myr. We hypothesize that these WDs are DWD merger products and compute the evolution of the postmerged configuration formed by a central WD surrounded by a disk. We show that the postmerger system evolves through three phases depending on whether accretion, mass ejection (propeller), or magnetic braking dominates the torque onto the central WD. We calculate the time the WD spends in each of these phases and obtain the accretion rate and disk mass for which the WD rotational age, i.e., the total time elapsed since the merger to the instant where the WD central remnant reaches the current measured rotation period, agrees with the estimated WD cooling age. We infer the mass values of the primary and secondary WD components of the DWD merger that lead to a postmerger evolution consistent with the observations. |
publishDate |
2022 |
dc.date.issued.fl_str_mv |
2022 |
dc.date.accessioned.fl_str_mv |
2023-02-07T05:01:25Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/254155 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-637X |
dc.identifier.nrb.pt_BR.fl_str_mv |
001160272 |
identifier_str_mv |
0004-637X 001160272 |
url |
http://hdl.handle.net/10183/254155 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The astrophysical journal. Bristol. Vol. 941, no. 1 (Dec. 2022), 28, 10 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/254155/2/001160272.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/254155/1/001160272.pdf |
bitstream.checksum.fl_str_mv |
0bf10246dafffa12427399b2678bd06f a47fcb93c5ec5808809a5eb17441eac5 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1815447818014294016 |