Emission Lines in the Near-infrared Spectra of the Infrared Quintuplet Stars in the Galactic Center

被引：9

作者：

Najarro, F. ^{[1
]}

Geballe, T. R. ^{[2
]}

Figer, D. F. ^{[3
]}

de la Fuente, D. ^{[4
]}

机构：

[1] INTA, CSIC, Ctr Astrobiol, Dept Astrofis, Ctra Torrejon & Ajalvir Km 4, E-28850 Torrejon De Ardoz, Spain

[2] Gemini Observ, 670 North Aohoku Pl, Hilo, HI 96720 USA

[3] Rochester Inst Technol, Ctr Detectors, 74 Lomb Mem Dr, Rochester, NY 14623 USA

[4] Univ Nacl Autonoma Mexico, Unidad Acad Ensenada, Inst Astron, Ensenada 22860, Baja California, Mexico

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 845卷 / 02期

关键词：

Galaxy: center; stars: evolution; stars: massive; stars: mass-loss; stars: Wolf-Rayet; WOLF-RAYET STARS; DIFFUSE INTERSTELLAR BANDS; PINWHEEL NEBULA; MASSIVE STARS; CLUSTER; SPECTROSCOPY; DUST; WR-104;

D O I：

10.3847/1538-4357/aa81d5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of a number of emission lines in the 1.0-2.4 mu m spectra of four of the five bright-infrared dust-embedded stars at the center of the Galactic center's (GC) Quintuplet Cluster. Spectroscopy of the central stars of these objects is hampered not only by the large interstellar extinction that obscures all of the objects in the GC, but also by the large amounts of warm circumstellar dust surrounding each of the five stars. The pinwheel morphologies of the dust observed previously around two of them are indicative of Wolf-Rayet colliding wind binaries; however, infrared spectra of each of the five have until now revealed only dust continua steeply rising to long wavelengths and absorption lines and bands from interstellar gas and dust. The emission lines detected, from ionized carbon and from helium, are broad and confirm that the objects are dusty late-type carbon Wolf-Rayet stars.

引用

页数：8

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