A new mass estimate method with hydrodynamical atmospheres for very massive WNh stars
Very massive stars with masses over 100 M⊙ are key objects in the Universe for our understanding of chemical and energetic feedback in the Universe, but their evolution and fate are almost entirely determined by their wind mass loss. Here, we aim to determine the mass of the most massive star known...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
April 2025
|
| In: |
Astronomy and astrophysics
Year: 2025, Volume: 696, Pages: 1-20 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/202453447 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1051/0004-6361/202453447 Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2025/04/aa53447-24/aa53447-24.html 
|
| Author Notes: | Gautham N. Sabhahit, Jorick S. Vink, Andreas A. C. Sander, Matheus Bernini-Peron, Paul A. Crowther, Roel R. Lefever, and Tomer Shenar |
MARC
| LEADER | 00000naa a2200000 c 4500 | ||
|---|---|---|---|
| 001 | 1940051150 | ||
| 003 | DE-627 | ||
| 005 | 20251103111747.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 251103s2025 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1051/0004-6361/202453447 |2 doi | |
| 035 | |a (DE-627)1940051150 | ||
| 035 | |a (DE-599)KXP1940051150 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 29 |2 sdnb | ||
| 100 | 1 | |a Sabhahit, Gautham N. |e VerfasserIn |0 (DE-588)1262013925 |0 (DE-627)1809429374 |4 aut | |
| 245 | 1 | 2 | |a A new mass estimate method with hydrodynamical atmospheres for very massive WNh stars |c Gautham N. Sabhahit, Jorick S. Vink, Andreas A. C. Sander, Matheus Bernini-Peron, Paul A. Crowther, Roel R. Lefever, and Tomer Shenar |
| 264 | 1 | |c April 2025 | |
| 300 | |b Diagramme | ||
| 300 | |a 20 | ||
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Online verfügbar: 25. April 2025 | ||
| 500 | |a Gesehen am 03.11.2025 | ||
| 520 | |a Very massive stars with masses over 100 M⊙ are key objects in the Universe for our understanding of chemical and energetic feedback in the Universe, but their evolution and fate are almost entirely determined by their wind mass loss. Here, we aim to determine the mass of the most massive star known in the Local Group R136a1. To this end, we computed the first hydrodynamically consistent non-local thermodynamical equilibrium atmosphere models for R136a1 (WN5h), as well as the binary system R144 (WN5/6h+WN6/7h) in the Tarantula Nebula. Using the Potsdam Wolf–Rayet code, we were able to simultaneously empirically derive and theoretically predict their mass-loss rates and wind velocities. By fitting synthetic spectra derived from these models to multi-wavelength observations, we constrained the stellar and wind properties of R144 and R136a1. We first determined the clumping stratification required by our hydro-models to fit the spectra of R144, using the available dynamical mass estimates for the two components. We then utilised this clumping stratification in hydrodynamic models of R136a1 and estimated a mass of MHydro of 233 M⊙. Remarkably, the estimated mass is close to and fully consistent with chemical homogeneous mass relations. This present-day mass of 233 M⊙ provides a lower limit to the initial stellar mass, which could be far higher due to previous wind mass loss. | ||
| 700 | 1 | |a Vink, Jorick S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Sander, Andreas A. C. |e VerfasserIn |0 (DE-588)1083288482 |0 (DE-627)847936775 |0 (DE-576)455682348 |4 aut | |
| 700 | 1 | |a Bernini Peron, Matheus |e VerfasserIn |0 (DE-588)1255228512 |0 (DE-627)1799326292 |4 aut | |
| 700 | 1 | |a Crowther, Paul A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Lefever, Roel |e VerfasserIn |0 (DE-588)1294988026 |0 (DE-627)1851790195 |4 aut | |
| 700 | 1 | |a Shenar, Tomer |e VerfasserIn |0 (DE-588)1135986320 |0 (DE-627)891042261 |0 (DE-576)490227872 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Astronomy and astrophysics |d Les Ulis : EDP Sciences, 1969 |g 696(2025) vom: Apr., Artikel-ID A200, Seite 1-20 |h Online-Ressource |w (DE-627)253390222 |w (DE-600)1458466-9 |w (DE-576)072283351 |x 1432-0746 |7 nnas |a A new mass estimate method with hydrodynamical atmospheres for very massive WNh stars |
| 773 | 1 | 8 | |g volume:696 |g year:2025 |g month:04 |g elocationid:A200 |g pages:1-20 |g extent:20 |a A new mass estimate method with hydrodynamical atmospheres for very massive WNh stars |
| 856 | 4 | 0 | |u https://doi.org/10.1051/0004-6361/202453447 |x Verlag |x Resolving-System |z kostenfrei |3 Volltext |
| 856 | 4 | 0 | |u https://www.aanda.org/articles/aa/abs/2025/04/aa53447-24/aa53447-24.html |x Verlag |z kostenfrei |3 Volltext |
| 951 | |a AR | ||
| 992 | |a 20251103 | ||
| 993 | |a Article | ||
| 994 | |a 2025 | ||
| 998 | |g 1294988026 |a Lefever, Roel |m 1294988026:Lefever, Roel |d 700000 |d 714000 |d 714100 |e 700000PL1294988026 |e 714000PL1294988026 |e 714100PL1294988026 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714100/ |p 6 | ||
| 998 | |g 1255228512 |a Bernini Peron, Matheus |m 1255228512:Bernini Peron, Matheus |d 700000 |d 714000 |d 714100 |e 700000PB1255228512 |e 714000PB1255228512 |e 714100PB1255228512 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714100/ |p 4 | ||
| 998 | |g 1083288482 |a Sander, Andreas A. C. |m 1083288482:Sander, Andreas A. C. |d 700000 |d 714000 |d 714100 |e 700000PS1083288482 |e 714000PS1083288482 |e 714100PS1083288482 |k 0/700000/ |k 1/700000/714000/ |k 2/700000/714000/714100/ |p 3 | ||
| 999 | |a KXP-PPN1940051150 |e 4795709025 | ||
| BIB | |a Y | ||
| SER | |a journal | ||
| JSO | |a {"relHost":[{"physDesc":[{"extent":"Online-Ressource"}],"origin":[{"publisher":"EDP Sciences ; Springer","dateIssuedKey":"1969","dateIssuedDisp":"1969-","publisherPlace":"Les Ulis ; Berlin ; Heidelberg"}],"id":{"eki":["253390222"],"zdb":["1458466-9"],"issn":["1432-0746"]},"name":{"displayForm":["European Southern Observatory (ESO)"]},"pubHistory":["1.1969 -"],"part":{"volume":"696","text":"696(2025) vom: Apr., Artikel-ID A200, Seite 1-20","extent":"20","year":"2025","pages":"1-20"},"titleAlt":[{"title":"Astronomy & astrophysics"},{"title":"a European journal"}],"note":["Gesehen am 21.06.2024","Erscheint 36mal jährlich in 12 Bänden zu je 3 Ausgaben","Fortsetzung der Druck-Ausgabe"],"disp":"A new mass estimate method with hydrodynamical atmospheres for very massive WNh starsAstronomy and astrophysics","type":{"media":"Online-Ressource","bibl":"periodical"},"language":["eng"],"corporate":[{"role":"isb","display":"European Southern Observatory","roleDisplay":"Herausgebendes Organ"}],"recId":"253390222","title":[{"title_sort":"Astronomy and astrophysics","subtitle":"an international weekly journal","title":"Astronomy and astrophysics"}]}],"physDesc":[{"noteIll":"Diagramme","extent":"20 S."}],"name":{"displayForm":["Gautham N. Sabhahit, Jorick S. Vink, Andreas A. C. Sander, Matheus Bernini-Peron, Paul A. Crowther, Roel R. Lefever, and Tomer Shenar"]},"id":{"eki":["1940051150"],"doi":["10.1051/0004-6361/202453447"]},"origin":[{"dateIssuedKey":"2025","dateIssuedDisp":"April 2025"}],"recId":"1940051150","language":["eng"],"note":["Online verfügbar: 25. April 2025","Gesehen am 03.11.2025"],"type":{"bibl":"article-journal","media":"Online-Ressource"},"person":[{"role":"aut","roleDisplay":"VerfasserIn","display":"Sabhahit, Gautham N.","given":"Gautham N.","family":"Sabhahit"},{"family":"Vink","given":"Jorick S.","display":"Vink, Jorick S.","roleDisplay":"VerfasserIn","role":"aut"},{"role":"aut","display":"Sander, Andreas A. C.","roleDisplay":"VerfasserIn","given":"Andreas A. C.","family":"Sander"},{"display":"Bernini Peron, Matheus","roleDisplay":"VerfasserIn","role":"aut","family":"Bernini Peron","given":"Matheus"},{"given":"Paul A.","family":"Crowther","role":"aut","roleDisplay":"VerfasserIn","display":"Crowther, Paul A."},{"role":"aut","display":"Lefever, Roel","roleDisplay":"VerfasserIn","given":"Roel","family":"Lefever"},{"role":"aut","display":"Shenar, Tomer","roleDisplay":"VerfasserIn","given":"Tomer","family":"Shenar"}],"title":[{"title":"A new mass estimate method with hydrodynamical atmospheres for very massive WNh stars","title_sort":"new mass estimate method with hydrodynamical atmospheres for very massive WNh stars"}]} | ||
| SRT | |a SABHAHITGANEWMASSEST2025 | ||