Optical and Infrared Photometry of the Nearby Type I[CLC]a[/CLC] Supernova 2001[CLC]el[/CLC]

Krisciunas, K.; Suntzeff, Nicholas B.; Candia, P.; Arenas, J.; Espinoza, J.; González, David; González, S.; Höflich, Peter; Landolt, A. U.; Phillips, M. M.; Pizarro, S.

doi:10.1086/345571

Cited by 162 publications

(136 citation statements)

References 40 publications

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“…SN 2001el reached its maximum magnitude (B = 12.8 mag) on 2001 September 30, and thereby became the brightest supernova that year. This supernova has been well monitored both photometrically and spectroscopically, and has been shown to be a normal Type Ia supernova (Krisciunas et al 2003).…”

Section: Extragalactic Dibsmentioning

confidence: 99%

Diffuse Interstellar Bands in NGC 1448

Sollerman

Cox

Mattila

et al. 2004

A&A

110

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Abstract. We present spectroscopic VLT/UVES observations of two emerging supernovae, the Type Ia SN 2001el and the Type II SN 2003hn, in the spiral galaxy NGC 1448. Our high resolution and high signal-to-noise spectra display atomic lines of Ca , Na , Ti  and K  in the host galaxy. In the line of sight towards SN 2001el, we also detect over a dozen diffuse interstellar bands (DIBs) within NGC 1448. These DIBs have strengths comparable to low reddening galactic lines of sight, albeit with some variations. In particular, a good match is found with the line of sight towards the σ type diffuse cloud (HD 144217). The DIBs towards SN 2003hn are significantly weaker, and this line of sight has also lower sodium column density. The DIB central velocities show that the DIBs towards SN 2001el are closely related to the strongest interstellar Ca  and Na  components, indicating that the DIBs are preferentially produced in the same cloud. The ratio of the λ 5797 and λ 5780 DIB strengths (r ∼ 0.14) suggests a rather strong UV field in the DIB environment towards SN 2001el. We also note that the extinction estimates obtained from the sodium lines using multiple line fitting agree with reddening estimates based on the colors of the Type Ia SN 2001el.

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Section: Extragalactic Dibsmentioning

confidence: 99%

Diffuse Interstellar Bands in NGC 1448

Sollerman

Cox

Mattila

et al. 2004

A&A

110

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“…d M. M. Phillips (2006, private communication). e Data taken from Krisciunas et al (2003). f Data taken from Rubin et al (1999).…”

Section: Observations and Reductionsmentioning

confidence: 99%

Calibrating Type Ia Supernovae Using the Planetary Nebula Luminosity Function. I. Initial Results

Feldmeier

Jacoby²,

Phillips

2007

ApJ

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We report the results of an [O iii] k5007 survey for PNe in five galaxies that were hosts of well-observed SNe Ia: NGC 524, NGC 1316, NGC 1380, NGC 1448, and NGC 4526. The goals of this survey are to better quantify the zero point of the maximum magnitudeYdecline rate relation for SNe Ia and to validate the insensitivity of Type Ia luminosity to parent stellar population using the host galaxy Hubble type as a surrogate. We detected a total of 45 PN candidates in NGC 1316, 44 candidates in NGC 1380, and 94 candidates in NGC 4526. From these data and the empirical planetary nebula luminosity function (PNLF), we derive distances of 17:9 þ0:8 À0:9 , 16:1 þ0:8 À1:1 , and 13:6 þ1:3 À1:2 Mpc, respectively. Our derived distance to NGC 4526 has a lower precision due to the likely presence of Virgo intracluster PNe in the foreground of this galaxy. In NGC 524 and NGC 1448 we detected no PN candidates down to the limiting magnitudes of our observations. We present a formalism for setting realistic distance limits in these two cases and derive robust lower limits of 20.9 and 15.8 Mpc, respectively. After combining these results with other distances from the PNLF, Cepheid, and surface brightness fluctuation distance indicators, we calibrate the optical and NIR relations for SNe Ia and find that the Hubble constants derived from each of the three methods are broadly consistent, implying that the properties of SNe Ia do not vary drastically as a function of stellar population. We determine a preliminary Hubble constant of H 0 ¼ 77 AE 3 (random) AE 5 (systematic) km s À1 Mpc À 1 for the PNLF, although more nearby galaxies with high-quality observations are clearly needed.

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“…Elias et al 1985, Meikle 2000, Krisciunas et al 2003. The most convincing explanation is due to a temperature sensitivity of the emissivity between singly and doubly ionised iron-peak elements (Kasen 2006).…”

Section: Type Ia Supernovaementioning

confidence: 99%

Supernovae and cosmology

Leibundgut

2007

Gen Relativ Gravit

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The extreme luminosity and their fairly unique temporal behaviour have made supernovae a superb tool to measure distances in the universe. As complex astrophysical events they provide interesting insights into explosion physics, explosive nucleosynthesis, hydrodynamics of the explosion and radiation transport. They are an end product of stellar evolution and provide clues to the stellar composition. Since they can be observed at large distances they have become critical probes to further explore astrophysical effects, like dust properties in external galaxies and the star formation history of galaxies. Some of the astrophysics interferes with the cosmological applications of supernovae. The local velocity field, distorted by the gravitational attraction of the local large scale structure, and the reddening law appear at the moment the major limitations in the accuracy with which cosmological parameters can be determined. These absorption effects can introduce a secondary bias into the observations of the distant supernovae, which needs to be carefully evaluated. Supernovae have been used for the measurement of the Hubble constant, i.e. the current expansion rate of the universe, and the accelerated cosmic expansion directly inferred from the apparent faintness of the distant supernovae.

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Optical and Infrared Photometry of the Nearby Type I[CLC]a[/CLC] Supernova 2001[CLC]el[/CLC]

Cited by 162 publications

References 40 publications

Diffuse Interstellar Bands in NGC 1448

Diffuse Interstellar Bands in NGC 1448

Calibrating Type Ia Supernovae Using the Planetary Nebula Luminosity Function. I. Initial Results

Supernovae and cosmology

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