2010A&A...514A..78P


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST23:04:22

2010A&A...514A..78P - Astronomy and Astrophysics, volume 514, A78-78 (2010/5-1)

Studying the small scale ISM structure with supernovae.

PATAT F., COX N.L.J., PARRENT J. and BRANCH D.

Abstract (from CDS):

In this work we explore the possibility of using the fast expansion of a type Ia supernova photosphere to detect extra-galactic ISM column density variations on spatial scales of ∼100AU on time scales of a few months. We constructed a simple model which describes the expansion of the photodisk and the effects of a patchy interstellar cloud on the observed equivalent width of NaI D lines. Using this model we derived the behavior of the equivalent width as a function of time, spatial scale and amplitude of the column density fluctuations. The calculations show that isolated, small (≤100AU) clouds with NaI column densities exceeding a few 1011cm–2 would be easily detected. In contrast, the effects of a more realistic, patchy ISM become measurable in a fraction of cases, and for peak-to-peak variations larger than ∼1012cm–2 on a scale of 1000AU. The proposed technique provides a unique way to probe the extra-galactic small scale structure, which is out of reach for any of the methods used so far. The same tool can also be applied to study the sub-AU Galactic ISM structure.

Abstract Copyright:

Journal keyword(s): supernovae: general - ISM: clouds - ISM: structure - ISM: general

Simbad objects: 7

goto Full paper

goto View the reference in ADS

Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9088 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5373 1
3 SN 2006X SN* 12 22 53.93 +15 48 32.0     15.3     SN.Ia 268 1
4 SN 1994D SN* 12 34 02.395 +07 42 05.70   11.75 12.03     SNIa 519 1
5 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2908 0
6 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1864 0
7 SN 2007le SN* 23 38 48.45 -06 31 21.7     15.2     SN.Ia 95 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2010A&A...514A..78P and select 'bookmark this link' or equivalent in the popup menu


2019.10.16-23:04:22

© Université de Strasbourg/CNRS

    • Contact