Catalina巡天数据库中新的m型周期变量

IF 0.9 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Astrophysics Pub Date : 2026-04-21 DOI:10.1007/s10511-026-09901-9

G. R. Kostandyan

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引用次数: 0

摘要

在本文中，我们继续从Catalina Sky Survey （CSS）数据库中确定P≥10天的光学微弱周期变量的光谱类别。基于Gaia Data Release 3 (DR3) BP/RP光谱数据库，确认G型和k型恒星169颗，确认m型恒星78颗。我们构建了新78 M型恒星的彩色绝对M(G)星等（CaMD）图和2MASS数据J-H与H-Ks的彩色图。通过分析这两张图和凌日系外行星测量卫星（TESS）的数据，我们可以得出74个物体是M巨星，4个物体是M矮星。ASAS-SN相位依赖光曲线分析证实47颗恒星为mira型变量，25颗为半规则型（SR）， 2颗为不规则型（IR）变量，4颗为旋转变量（ROT）。2颗M型矮星和34颗巨星的光谱能量分布（SED）显示出红外过剩，表明它们周围存在环星包层。

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New M-type Periodic Variables of Catalina Sky Survey Database

In this paper we continue spectral class determinations for optically faint periodic variables from Catalina Sky Survey (CSS) database for which P ≥ 10 days. Based on Gaia Data Release 3 (DR3) BP/RP spectroscopic data base 169 objects are confirmed as G and K-type stars, 78 objects are confirmed as M-type stars. We have constructed the color-absolute M(G) magnitude (CaMD) diagram and 2MASS data J-H versus H-Ks color-color diagram for new 78 M type stars. By analyzing the two diagrams and Transiting Exoplanet Survey Satellite (TESS) data, we can conclude that 74 objects are M giants and 4 objects are M dwarfs. The ASAS-SN phase dependence light curves analysis confirms 47 stars as Mira-type variables, 25 as Semi-Regulars (SR), two objects as Irregular (IR)-type variables and 4 as Rotating variables (ROT). Two M type dwarfs and 34 giants, show Spectral Energy Distribution (SED) with infrared excess, indicating the existence of circumstellar envelope around them.

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来源期刊

Astrophysics 地学天文-天文与天体物理

CiteScore

0.90

自引率

20.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Astrophysics (Ap) is a peer-reviewed scientific journal which publishes research in theoretical and observational astrophysics. Founded by V.A.Ambartsumian in 1965 Astrophysics is one of the international astronomy journals. The journal covers space astrophysics, stellar and galactic evolution, solar physics, stellar and planetary atmospheres, interstellar matter. Additional subjects include chemical composition and internal structure of stars, quasars and pulsars, developments in modern cosmology and radiative transfer.