The Near-infrared Tip of the Red Giant Branch. II. An Absolute Calibration in the Large Magellanic Cloud

被引：34

作者：

Hoyt, Taylor J. ^{[1
]}

Freedman, Wendy L. ^{[1
]}

Madore, Barry F. ^{[2
]}

Seibert, Mark ^{[2
]}

Beaton, Rachael L. ^{[3
]}

Hatt, Dylan ^{[1
]}

Jang, In Sung ^{[4
]}

Lee, Myung Gyoon ^{[5
]}

Monson, Andrew J. ^{[6
]}

Rich, Jeffrey A. ^{[2
]}

机构：

[1] Univ Chicago, Dept Astron & Astrophys, 5640 South Ellis Ave, Chicago, IL 60637 USA

[2] Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 USA

[3] Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08544 USA

[4] Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany

[5] Seoul Natl Univ, Dept Phys & Astron, Seoul, South Korea

[6] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 858卷 / 01期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

distance scale; galaxies: distances and redshifts; galaxies: stellar content; infrared: stars; Magellanic Clouds; stars: Population II; ALL-SKY SURVEY; VORONOI TESSELLATIONS; DISTANCE; LUMINOSITY; GEOMETRY; STARS; 2MASS;

D O I：

10.3847/1538-4357/aab7ed

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a new empirical JHK absolute calibration of the tip of the red giant branch (TRGB) in the Large Magellanic Cloud (LMC). We use published data from the extensive Near-Infrared Synoptic Survey containing 3.5 million stars, 65,000 of which are red giants that fall within one magnitude of the TRGB. Adopting the TRGB slopes from a companion study of the isolated dwarf galaxy IC 1613, as well as an LMC distance modulus of mu(0) - 18.49 mag from (geometric) detached eclipsing binaries, we derive absolute JHK zero points for the near-infrared TRGB. For a comparison with measurements in the bar alone, we apply the calibrated JHK TRGB to a 500 deg(2) area of the 2MASS survey. The TRGB reveals the 3D structure of the LMC with a tilt in the direction perpendicular to the major axis of the bar, which is in agreement with previous studies.

引用

页数：9

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