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Hubble Space Telescope Identification of the Optical Counterparts of Ultraluminous X‐Ray Sources in M51

  • Authors: Yuichi Terashima, Hirohiko Inoue, and Andrew S. Wilson

Terashima, Inoue, & Wilson 2006 The Astrophysical Journal 645 264.

  • Provider: AAS Journals

Caption: Fig. 4.

Locations of candidate counterparts of ULX‐1, ULX‐2, and ULX‐9 in color‐magnitude diagrams. The stellar evolutionary tracks of 20, 15, 12, 9, and 7 M (top to bottom) of Lejeune & Schaerer (2001) are shown as alternating solid and dashed lines.

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