Dissecting the Interstellar Media of A Wolf-Rayet Galaxy at $z=2.76$
Takahiro Morishita, Massimo Stiavelli, Stefan Schuldt, Claudio Grillo
arXiv:2404.10037v1 Announce Type: new
Abstract: We report JWST/NIRSpec observations of a star-forming galaxy at $z=2.76$, MACSJ1149-WR1. We securely detect two temperature-sensitive auroral lines, [SIII]6312 (7.4$sigma$) and [OII]7320+7331 doublets (10$sigma$), and tentatively [NII]5755 ($2.3sigma$) for the first time in an individual galaxy at $z>1$. We perform a detailed analysis of its interstellar media (ISM), and derive electron temperatures, various heavy element abundances (O/H, N/O, S/O, and Ar/O) in the hot ionized region, and the neutral fraction in the warm ionized region. MACSJ1149-WR1 shows a broad feature at the wavelength of HeII 4686, which consists of a broad ($sim1000$km/s), blue-shifted ($sim-110$km/s) line component. Taken together with its mildly elevated N/O abundance, we conclude that MACSJ1149-WR1 is experiencing a young starburst ($arXiv:2404.10037v1 Announce Type: new
Abstract: We report JWST/NIRSpec observations of a star-forming galaxy at $z=2.76$, MACSJ1149-WR1. We securely detect two temperature-sensitive auroral lines, [SIII]6312 (7.4$sigma$) and [OII]7320+7331 doublets (10$sigma$), and tentatively [NII]5755 ($2.3sigma$) for the first time in an individual galaxy at $z>1$. We perform a detailed analysis of its interstellar media (ISM), and derive electron temperatures, various heavy element abundances (O/H, N/O, S/O, and Ar/O) in the hot ionized region, and the neutral fraction in the warm ionized region. MACSJ1149-WR1 shows a broad feature at the wavelength of HeII 4686, which consists of a broad ($sim1000$km/s), blue-shifted ($sim-110$km/s) line component. Taken together with its mildly elevated N/O abundance, we conclude that MACSJ1149-WR1 is experiencing a young starburst ($

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