What is recorded here?
Hubble monitoring of the field containing supernova Refsdal revealed a brightening point source, LS1, in a background galaxy at redshift 1.49. Its color and light curve were interpreted as a strongly magnified individual star, with the authors estimating a peak magnification of at least about 2,000 under their lens model. The observation illustrates how cluster lensing combined with microlensing can reveal individual stars at cosmological distances.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
The source identification, stellar temperature and magnification depend on spectral and lens models, and different cluster models disagree appreciably. A nearby 2016 transient may be a counterimage or a different star; this is not a confirmed compact-object detection. The paper explores model-dependent dark-matter constraints, not a direct measurement of the dark-matter particle. This star is distinct from the Refsdal supernova, although the monitoring field and some observations overlap. The supplementary simulated counterimage and dark-matter comparisons assume a lens geometry and stellar mass density; luminous-star clustering and the possibility of an unresolved pair can affect the interpretation.
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People and systems
Patrick L. Kelly; Jose M. Diego; Steven Rodney
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged. The recorded author list is incomplete.
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English catalogue narrative
A galaxy cluster magnifies a distant individual star
Hubble monitoring of the field containing supernova Refsdal revealed a brightening point source, LS1, in a background galaxy at redshift 1.49. Its color and light curve were interpreted as a strongly magnified individual star, with the authors estimating a peak magnification of at least about 2,000 under their lens model. The observation illustrates how cluster lensing combined with microlensing can reveal individual stars at cosmological distances.
Scientific scope
The source identification, stellar temperature and magnification depend on spectral and lens models, and different cluster models disagree appreciably. A nearby 2016 transient may be a counterimage or a different star; this is not a confirmed compact-object detection. The paper explores model-dependent dark-matter constraints, not a direct measurement of the dark-matter particle. This star is distinct from the Refsdal supernova, although the monitoring field and some observations overlap. The supplementary simulated counterimage and dark-matter comparisons assume a lens geometry and stellar mass density; luminous-star clustering and the possibility of an unresolved pair can affect the interpretation.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
Patrick L. Kelly; Jose M. Diego; Steven Rodney
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.