New limits from microlensing on Galactic black holes in the mass range 10 M⊙ < M < 1000 M⊙

被引：39

作者：

Blaineau, T. ^{[1
]}

Moniez, M. ^{[1
]}

Afonso, C. ^{[2
]}

Albert, J-N ^{[1
]}

Ansari, R. ^{[1
]}

Aubourg, E. ^{[2
,3
]}

Coutures, C. ^{[2
]}

Glicenstein, J-F ^{[2
]}

Goldman, B. ^{[4
,5
]}

Hamadache, C. ^{[1
]}

Lasserre, T. ^{[2
]}

Le Guillou, L. ^{[6
]}

Lesquoy, E. ^{[2
]}

Magneville, C. ^{[2
]}

Marquette, J-B ^{[7
]}

Palanque-Delabrouille, N. ^{[2
,8
]}

Perdereau, O. ^{[1
]}

Rich, J. ^{[2
]}

Spiro, M. ^{[2
]}

Tisserand, P. ^{[9
,10
]}

机构：

[1] Univ Paris Saclay, Fac Sci, Lab Phys Infinis Irene Joliot Curie 2, CNRS, Bat 100, F-91405 Orsay, France

[2] Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France

[3] Univ Paris, Astroparticule & Cosmol, CNRS, F-75013 Paris, France

[4] Int Space Univ, 1 Rue Jean Dominique Cassini, F-67400 Illkirch Graffenstaden, France

[5] Univ Strasbourg, Observ Astron, CNRS, UMR 7550, F-67000 Strasbourg, France

[6] Sorbonne Univ, Lab Phys Nucl & Hautes Energies LPNHE, CNRS IN2P3, F-75005 Paris, France

[7] Univ Bordeaux, CNRS, Lab Astrophys Bordeaux, B18N,Allee Geoffroy St Hilaire, F-33615 Pessac, France

[8] Lawrence Berkeley Natl Lab, One Cyclotron Rd, Berkeley, CA 94720 USA

[9] UPMC Univ Paris 6, Sorbonne Univ, F-75014 Paris, France

[10] CNRS, UMR 7095, Inst Astrophys Paris, F-75014 Paris, France

来源：

ASTRONOMY & ASTROPHYSICS | 2022年 / 664卷

基金：

美国国家科学基金会;

关键词：

gravitational lensing: micro; surveys; stars: black holes; Galaxy: halo; Galaxy: kinematics and dynamics dark; matter; LARGE-MAGELLANIC-CLOUD; OPTICAL DEPTH; EVENT RATE; BULGE; HALO;

D O I：

10.1051/0004-6361/202243430

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We searched for long-duration microlensing events originating from intermediate-mass black holes (BH) in the halo of the MilkyWay, using archival data from the EROS-2 and MACHO photometric surveys towards the Large Magellanic Cloud (LMC). We combined data from these two surveys to create a common database of light curves for 14.1 million objects in the LMC, covering a total duration of 10.6 years, with flux series measured in four wide passbands. We carried out a microlensing search on these light curves, complemented by the light curves of 22.7 million objects, observed only by EROS-2 or only by MACHO, over about 7 years, with flux series measured in only two passbands. A likelihood analysis, taking into account the LMC self-lensing and Milky Way disk contributions, allows us to conclude that compact objects with masses in the range 10 100 M-circle dot cannot make up more than similar to 15% of a standard halo total mass (at a 95% confidence level). Our analysis sensitivity weakens for heavier objects, although we still rule out the possibility of similar to 50% of the halo being made of similar to 1000 M-circle dot BHs. Combined with previous EROS results, an upper limit of similar to 15% of the total halo mass can be obtained for the contribution of compact halo objects in the mass range 10(6) - 10(2) M-circle dot.

引用

页数：8

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New limits from microlensing on Galactic black holes in the mass range 10 M⊙ &lt; M &lt; 1000 M⊙

New limits from microlensing on Galactic black holes in the mass range 10 M⊙ < M < 1000 M⊙