A TYPE Ia SUPERNOVA AT REDSHIFT 1.55 IN HUBBLE SPACE TELESCOPE INFRARED OBSERVATIONS FROM CANDELS

Journal Article · Fri Feb 10 00:00:00 EST 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/746/1/5· OSTI ID:22011860

Rodney, Steven A; Riess, Adam G; Jones, David O ^[1]; Dahlen, Tomas; Ferguson, Henry C; Casertano, Stefano; Grogin, Norman A ^[2]; Strolger, Louis-Gregory ^[3]; Hjorth, Jens; Frederiksen, Teddy F ^[4]; Weiner, Benjamin J ^[5]; Mobasher, Bahram ^[6]; Challis, Peter; Kirshner, Robert P ^[7]; Faber, S M ^[8]; Filippenko, Alexei V ^[9]; Garnavich, Peter; Hayden, Brian ^[10]; Graur, Or ^[11]; Jha, Saurabh W ^[12] ; others, and

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1. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218 (United States)
2. Space Telescope Science Institute, Baltimore, MD 21218 (United States)
3. Department of Physics, Western Kentucky University, Bowling Green, KY 42101 (United States)
4. Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen (Denmark)
5. Department of Astronomy, University of Arizona, Tucson, AZ 85721 (United States)
6. Department of Physics and Astronomy, University of California, Riverside, CA 92521 (United States)
7. Harvard/Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)
8. Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 92064 (United States)
9. Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States)
10. Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States)
11. Department of Astrophysics, Tel Aviv University, 69978 Tel Aviv (Israel)
12. Department of Physics and Astronomy, Rutgers, State University of New Jersey, Piscataway, NJ 08854 (United States)

We report the discovery of a Type Ia supernova (SN Ia) at redshift z = 1.55 with the infrared detector of the Wide Field Camera 3 (WFC3-IR) on the Hubble Space Telescope (HST). This object was discovered in CANDELS imaging data of the Hubble Ultra Deep Field and followed as part of the CANDELS+CLASH Supernova project, comprising the SN search components from those two HST multi-cycle treasury programs. This is the highest redshift SN Ia with direct spectroscopic evidence for classification. It is also the first SN Ia at z > 1 found and followed in the infrared, providing a full light curve in rest-frame optical bands. The classification and redshift are securely defined from a combination of multi-band and multi-epoch photometry of the SN, ground-based spectroscopy of the host galaxy, and WFC3-IR grism spectroscopy of both the SN and host. This object is the first of a projected sample at z > 1.5 that will be discovered by the CANDELS and CLASH programs. The full CANDELS+CLASH SN Ia sample will enable unique tests for evolutionary effects that could arise due to differences in SN Ia progenitor systems as a function of redshift. This high-z sample will also allow measurement of the SN Ia rate out to z Almost-Equal-To 2, providing a complementary constraint on SN Ia progenitor models.

• OSTI ID: 22011860
• Journal Information: Astrophysical Journal, Vol. 746, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CAMERAS
GALAXIES
PHOTOMETRY
RED SHIFT
SPECTROSCOPY
SUPERNOVAE
TELESCOPES