对最近发现的大灾变变星 TUVO-21acq 的偶然观测

IF 3.3 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Publications of the Astronomical Society of the Pacific Pub Date : 2024-05-01 DOI:10.1088/1538-3873/ad4592

Lynne A. Valencic, Kimberly A. Weaver, K. D. Kuntz, J. Cann, R. Pfeifle

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引用次数: 0

摘要

最近发现的非磁性大灾变TUVO-21acq是在对星爆星系NGC 4945的XMM-牛顿观测活动中偶然观测到的静态变星。这次观测活动的数据与 XMM 偶然观测的档案数据相结合，对其 X 射线和紫外线/光学特性进行了研究。发现TUVO-21acq的X射线通量F X(0.4-3.0 keV) ∼ 1.3 × 10-14 erg s-1 cm-2，其特征与其他静止矮新星相似，X射线光度L X(0.4-3.0 keV) ∼ 8 × 1030 erg s-1，白矮星质量M WD = 0.78 - 0.27 + 0.37 M ⊙。它的紫外/光学光谱在不同的观测中变化不定，这可能是由于吸积盘的变化或者亮斑的能见度造成的。

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A Serendipitous Observation of the Recently Discovered Cataclysmic Variable TUVO-21acq

The recently discovered non-magnetic cataclysmic variable TUVO-21acq was serendipitously observed in a quiescent state during an XMM-Newton observing campaign for the starburst galaxy NGC 4945. Data from this campaign was combined with archival serendipitous XMM observations to examine its X-ray and UV/optical characteristics. TUVO-21acq was found to have X-ray flux F X(0.4–3.0 keV) ∼ 1.3 × 10−14 erg s−1 cm−2 and features similar to other quiescent dwarf novae, with X-ray luminosity L X(0.4–3.0 keV) ∼ 8 × 1030 erg s−1 and a white dwarf mass

M WD = 0.78 − 0.27 + 0.37 M ⊙

. Its UV/optical spectrum was variable between observations, possibly due to changes in the accretion disk or the visibility of the bright spot.

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来源期刊

Publications of the Astronomical Society of the Pacific 地学天文-天文与天体物理

CiteScore

6.70

自引率

5.70%

发文量

103

审稿时长

4-8 weeks

期刊介绍： The Publications of the Astronomical Society of the Pacific (PASP), the technical journal of the Astronomical Society of the Pacific (ASP), has been published regularly since 1889, and is an integral part of the ASP''s mission to advance the science of astronomy and disseminate astronomical information. The journal provides an outlet for astronomical results of a scientific nature and serves to keep readers in touch with current astronomical research. It contains refereed research and instrumentation articles, invited and contributed reviews, tutorials, and dissertation summaries.