利用来自gaia dr3和2mass的光度和天体测量数据对疏散星团NGC 5288进行了深入研究

IF 1.1 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Revista Mexicana de Astronomia y Astrofisica Pub Date : 2023-10-01 DOI:10.22201/ia.01851101p.2023.59.02.03

Ritika Sethi, D. Bisht, Geeta Rangwal, A. Raj

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引用次数: 0

摘要

本文利用2MASS JHKS和最近发布的Gaia DR3天文测量和光度数据，研究了一个研究较少的疏散星团NGC 5288。赤经和赤纬的平均运动分别为(-3.840±0.230)mas /年和(-1.934±0.162)mas /年。我们还利用彩色星等图(CMDs)推算出该星团的年龄为510±190 Myr，距离为2.64±0.11 kpc。用视差法得到的距离为2.77±0.42 kpc。星团方向的星际变红E(B - V)通过((J - H)， (J - K))色-色图确定为0.45等。我们发现主序星在1.0-2.7 M☉质量范围内的质量函数斜率为1.39±0.29，这与Salpeter在不确定度内的值一致。银河系轨道是用星系势能模型推导出来的，表明NGC 5288沿着环绕银河系中心的圆形路径运行。

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A DEEP STUDY OF THE OPEN CLUSTER NGC 5288 USING PHOTOMETRIC AND ASTROMETRIC DATA FROM GAIA DR3 AND 2MASS

This paper investigates a poorly studied open cluster, NGC 5288, using 2MASS JHKS and the recently released Gaia DR3 astrometric and photometric data. The mean proper motions in right ascension and declination are estimated as (-3.840 ± 0.230) and (-1.934 ± 0.162) mas yr-1 respectively. We also derive the age and distance of the cluster as 510 ± 190 Myr and 2.64 ± 0.11 kpc, using color-magnitude diagrams (CMDs). We also obtain the distance as 2.77 ± 0.42 kpc using the parallax method. Interstellar reddening E(B ‒ V) in the direction of the cluster is determined as 0.45 mag using the ((J ‒ H), (J ‒ K)) color-color diagram. We find the mass function slope for main-sequence stars as 1.39 ± 0.29 within the mass range 1.0-2.7 M☉, which agrees with Salpeter's value within the uncertainty. Galactic orbits are derived using the Galactic potential model, indicating that NGC 5288 follows a circular path around the Galactic center.

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来源期刊

Revista Mexicana de Astronomia y Astrofisica 地学天文-天文与天体物理

CiteScore

1.30

自引率

10.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Revista Mexicana de Astronomía y Astrofísica, founded in 1974, publishes original research papers in all branches of astronomy, astrophysics and closely related fields. Two numbers per year are issued and are distributed free of charge to all institutions engaged in the fields covered by the RMxAA.