GRB 011121: A Massive Star Progenitor | Zendy

P. A. Price | Zendy; E. Berger | Zendy; D. Reichart | Zendy; S. R. Kulkarni | Zendy; S. A. Yost | Zendy; R. Subrahmanyan | Zendy; R. M. Wark | Zendy; M. H. Wieringa | Zendy; D. A. Frail | Zendy; Jeremy Bailey | Zendy; B. Boyle | Zendy; Elizabeth L. Corbett | Zendy; K. F. Gunn | Zendy; S. D. Ryder | Zendy; N. Seymour | Zendy; K. Koviak | Zendy; Patrick J. McCarthy | Zendy; M. M. Phillips | Zendy; T. S. Axelrod | Zendy; J. S. Bloom | Zendy; S. G. Djorgovski | Zendy; D. B. Fox | Zendy; T. J. Galama | Zendy; Fiona A. Harrison | Zendy; K. Hurley | Zendy; Re’em Sari | Zendy; B. Schmidt | Zendy; M. J. I. Brown | Zendy; T. L. Cline | Zendy; F. Frontera | Zendy; C. Guidorzi | Zendy; E. Montanari | Zendy

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GRB 011121: A Massive Star Progenitor

Author(s) -

P. A. Price,

E. Berger,

D. Reichart,

S. R. Kulkarni,

S. A. Yost,

R. Subrahmanyan,

R. M. Wark,

M. H. Wieringa,

D. A. Frail,

Jeremy Bailey,

B. Boyle,

Elizabeth L. Corbett,

K. F. Gunn,

S. D. Ryder,

N. Seymour,

K. Koviak,

Patrick J. McCarthy,

M. M. Phillips,

T. S. Axelrod,

J. S. Bloom,

S. G. Djorgovski,

D. B. Fox,

T. J. Galama,

Fiona A. Harrison,

K. Hurley,

Re’em Sari,

B. Schmidt,

M. J. I. Brown,

T. L. Cline,

F. Frontera,

C. Guidorzi,

E. Montanari

Publication year - 2002

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/341552

Subject(s) - gamma ray burst , physics , afterglow , astrophysics , supernova , astronomy , redshift , light curve , galaxy

Of the cosmological gamma-ray bursts, GRB 011121 has the lowest redshift,z=0.36. More importantly, the multi-color excess in the afterglow detected inthe Hubble Space Telescope (HST) light curves is compelling observationalevidence for an underlying supernova. Here we present near-infrared and radioobservations of the afterglow. We undertake a comprehensive modeling of theseobservations and those reported in the literature and find good evidencefavoring a wind-fed circumburst medium. In detail, we infer the progenitor hada mass loss rate of Mdot ~ 10^-7 / v_w3 Mo/yr where v_w3 is the speed of thewind from the progenitor in units of 10^3 km/s. This mass loss rate is similarto that inferred for the progenitor of SN 1998bw which has been associated withGRB 980425. Our data, taken in conjunction with the HST results of Bloom et al.(2002), provide a consistent picture: the long duration GRB 011121 had amassive star progenitor which exploded as a supernova at about the same time asthe GRB event.Comment: 17 pages, 3 figures. Submitted to ApJ Letter

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