WIYN Open Cluster Study. LXXXVII. Hubble Space Telescope Ultraviolet Detection of Hot White Dwarf Companions to Blue Lurkers in M67

被引：11

作者：

Nine, Andrew C. ^{[1
]}

Mathieu, Robert D. ^{[1
]}

Gosnell, Natalie M. ^{[2
]}

Leiner, Emily M. ^{[3
]}

机构：

[1] Univ Wisconsin Madison, Dept Astron, 475 N Charter St, Madison, WI 53706 USA

[2] Colorado Coll, Dept Phys, 14 East Cache Poudre St, Colorado Springs, CO 80903 USA

[3] Northwestern Univ, Ctr Interdisciplinary Explorat & Res Astrophys, 2145 Sheridan Rd, Evanston, IL 60208 USA

来源：

ASTROPHYSICAL JOURNAL | 2023年 / 944卷 / 02期

关键词：

MASS-TRANSFER; MAIN-SEQUENCE; STELLAR TRACKS; BINARY STAR; NGC; 188; EFFECTIVE TEMPERATURES; CONVECTIVE BOUNDARIES; DETAILED ANALYSIS; MESA ISOCHRONES; STRAGGLER STARS;

D O I：

10.3847/1538-4357/acb046

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of our Hubble Space Telescope far-ultraviolet survey of the blue lurkers (BLs) in M67. We find evidence for two white dwarf (WD) companions among the BLs that are indicative of mass transfer from an evolved companion, one in WOCS 14020 and the other in WOCS 3001. The cooling ages of the WDs suggest that mass transfer in these systems occurred similar to 300-540 Myr and similar to 600-900 Myr ago, respectively. The rotation periods and cooling ages of the BLs are consistent with spin-up and subsequent single-star spin-down models, and binary evolution models yield plausible evolutionary pathways to both BLs via highly nonconservative mass transfer. We conclude that the BLs are lower-luminosity analogs to the classical blue stragglers.

引用

页数：12

共 5 条

[1] UVIT Open Cluster Study. I. Detection of a White Dwarf Companion to a Blue Straggler in M67: Evidence of Formation through Mass Transfer
Sindhu, N.
Subramaniam, Annapurni
Jadhav, Vikrant V.
Chatterjee, Sourav
Geller, Aaron M.
Knigge, Christian
Leigh, Nathan
Puzia, Thomas H.
Shara, Michael
Simunovic, Mirko
ASTROPHYSICAL JOURNAL, 2019, 882 (01):
[2] WIYN Open Cluster Study. XC. Barium Surface Abundances of Blue Straggler Stars in the Open Clusters NGC 7789 and M67
Nine, Andrew C.
Mathieu, Robert D.
Schuler, Simon C.
Milliman, Katelyn E.
ASTROPHYSICAL JOURNAL, 2024, 970 (02):
[3] Wiyn open cluster study. VI. Interpretive models of light-element depletion from M67 subgiants
Sills, A
Deliyannis, CP
ASTROPHYSICAL JOURNAL, 2000, 544 (02): : 944 - 952
[4] UOCS - VI. UVIT/AstroSat detection of low-mass white dwarf companions to four more blue stragglers in M67
Pandey, Sindhu
Subramaniam, Annapurni
Jadhav, Vikrant V.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2021, 507 (02) : 2373 - 2382
[5] UVIT Open Cluster Study. II. Detection of Extremely Low Mass White Dwarfs and Post?Mass Transfer Binaries in M67
Jadhav, Vikrant V.
Sindhu, N.
Subramaniam, Annapurni
ASTROPHYSICAL JOURNAL, 2019, 886 (01):

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