OBSERVATIONS OF TYPE Ia SUPERNOVA 2014J WITH FLITECAM ON SOFIA

Journal Article · Fri May 01 04:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/804/1/66· OSTI ID:22522460

Vacca, William D.; Hamilton, Ryan T.; Savage, Maureen; Shenoy, Sachindev; Becklin, E. E.; Helton, L. A. ^[1]; McLean, Ian S.; Logsdon, Sarah E. ^[2]; Marion, G. H. ^[3]; Ashok, N. M.; Banerjee, D. P. K. ^[4]; Evans, A. ^[5]; Fox, O. D. ^[6]; Garnavich, P. ^[7]; Gehrz, R. D. ^[8]; Greenhouse, M. ^[9]; Kirshner, R. P. ^[10]; Shenoy, D. ^[11]; Smith, Nathan ^[12]; others, and

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1. SOFIA-USRA, NASA Ames Research Center, Mail Stop N232-12, Moffet Field, CA 94035-1000 (United States)
2. Department of Physics and Astronomy, UCLA, Los Angeles, CA 90095-1562 (United States)
3. University of Texas at Austin, 1 University Station C1400, Austin, TX 78712-0259 (United States)
4. Physical Research Laboratory, Ahmedabad 380009 (India)
5. Astrophysics Group, Keele University, Keele, Staffordshire, ST5 5BG (United Kingdom)
6. Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States)
7. University of Notre Dame, 225 Nieuwland Science Ctr, Notre Dame, IN 46556-5670 (United States)
8. Minnesota Institute for Astrophysics, University of Minnesota, 116 Church St. SE, Minneapolis, MN 55455-0149 (United States)
9. NASA Goddard Space Flight Center, Code 665, Greenbelt, MD 20771 (United States)
10. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
11. Minnesota Institute for Astrophysics, School of Physics and Astronomy, University of Minnesota, 116 Church Street, S. E., Minneapolis, MN 55455 (United States)
12. Steward Observatory, 933 N. Cherry Avenue, Tucson, AZ 85719 (United States)

We present medium-resolution near-infrared (NIR) spectra, covering 1.1–3.4 μm, of the normal Type Ia supernova (SN Ia) SN 2014J in M82 obtained with the FLITECAM instrument on board Stratospheric Observatory for Infrared Astronomy (SOFIA) between 17 and 26 days after maximum B light. Our 2.8–3.4 μm spectra may be the first ∼3 μm spectra of an SN Ia ever published. The spectra spanning the 1.5–2.7 μm range are characterized by a strong emission feature at ∼1.77 μm with a FWHM of ∼11,000–13,000 km s{sup −1}. We compare the observed FLITECAM spectra to the recent non-LTE delayed detonation models of Dessart et al. and find that the models agree with the spectra remarkably well in the 1.5–2.7 μm wavelength range. Based on this comparison we identify the ∼1.77 μm emission peak as a blend of permitted lines of Co ii. Other features seen in the 2.0–2.5 μm spectra are also identified as emission from permitted transitions of Co ii. However, the models are not as successful at reproducing the spectra in the 1.1–1.4 μm range or between 2.8 and 3.4 μm. These observations demonstrate the promise of SOFIA, which allows access to wavelength regions inaccessible from the ground, and serve to draw attention to the usefulness of the regions between the standard ground-based NIR passbands for constraining SN models.

• OSTI ID: 22522460
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 804; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTRONOMY
COBALT
COMPARATIVE EVALUATIONS
INFRARED SPECTRA
LTE
NEAR INFRARED RADIATION
RESOLUTION
SUPERNOVAE
VISIBLE RADIATION
WAVELENGTHS