منابع مشابه
The Subluminous Type Ia Supernova 1998de in Ngc 252
We present spectroscopic and extensive photometric observations of supernova (SN) 1998de in the S0 galaxy NGC 252, discovered during the course of the Lick Observatory Supernova Search. These data, which span a time period of 8 days before to 76 days after B-band maximum, unambiguously establish SN 1998de as a peculiar and subluminous type Ia supernova (SN Ia) with strong similarities to SN 199...
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Ouron-goingobservations of the interstellarmedium of NGC 4414 have resulted in CO(1–0) and CO(2–1) detections to very close to the optical edge of the disk. The 13CO lines and thermal dust continuum emission have been detected almost as far out. The variation in the beam-independent CO(2−1 1−0 ) line intensity ratio is interpreted in terms of a variation in the CO excitation temperature. Combin...
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We present three-frequency VLA observations of the flocculent spiral galaxy NGC 4414 made in order to study the magnetic field structure in absence of strong density wave flows. NGC 4414 shows a regular spiral pattern of observed polarization B-vectors with a radial component comparable in strength to the azimuthal one. The average pitch angle of the magnetic field is about 20 • , similar to ga...
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We have fit the normal, well observed, Type Ia Supernova (SN Ia) SN 1994D with non-LTE spectra of the deflagration model W7. We find that well before maximum luminosity W7 fits the optical spectra of SN 1994D. After maximum brightness the quality of the fits weakens as the spectrum forms in a core rich in iron peak elements. We show the basic structure of W7 is likely to be representative of th...
متن کاملExtinction Correction for Type Ia Supernova Rates. I. The Model
In this paper we present and discuss a new Monte Carlo approach aimed at correcting the observed Supernova (SN) rates for the effects of host galaxy dust extinction. The problem is addressed in a general way and the model includes SN position distributions, SN light curve and spectral library, dust properties and distribution as input ingredients. Even though the recipe we propose is in princip...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1976
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/175.3.595