J/A+A/618/A104 NGC3278, SN2009bb host, ATCA and MUSE data (Michalowski+, 2018)
Relativistic supernova 2009bb exploded close to an atomic gas cloud.
Michalowski M.J., Gentile G., Kruhler T., Kuncarayakti H., Kamphuis P.,
Hjorth J., Berta S., Delia V., Elliott J., Galbany L., Greiner J.,
Hunt L.K., Koprowski M.P., Le Floch E., Nicuesa Guelbenzu A., Palazzi E.,
Rasmussen J., Rossi A., Savaglio S., de Ugarte Postigo A., van der Werf P.,
Vergani S.D.
<Astron. Astrophys. 618, A104 (2018)>
=2018A&A...618A.104M 2018A&A...618A.104M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, optical ; Galaxies, radio ; Supernovae ;
Interstellar medium ; Abundances ; Extinction ; H I data ;
Interferometry
Keywords: dust, extinction - galaxies: individual: NGC 3278 - galaxies: ISM -
galaxies: star formation - supernovae: individual: SN 2009bb -
radio lines: galaxies
Abstract:
The host galaxies of gamma-ray bursts (GRBs) have been claimed to have
experienced a recent inflow of gas from the intergalactic medium. This
is because their atomic gas distribution is not centred on their
optical emission and because they are deficient in molecular gas given
their high star-formation rates. Similar studies have not been
conducted for host galaxies of relativistic supernovae (SNe), which
may have similar progenitors. The potential similarity of the powering
mechanisms of relativistic SNe and GRBs allowed us to make a
prediction that relativistic SNe are born in environments similar to
those of GRBs, i.e. rich in atomic gas. Here we embark on testing this
hypothesis by analysing the properties of the host galaxy NGC 3278 of
the relativistic SN 2009bb. This is the first time the atomic gas
properties of a relativistic SN host is analysed and the first time
resolved 21cm hydrogen line (HI) information is provided for a host of
a SN of any type. We obtained radio observations with Australia
Telescope Compact Array (ATCA) covering HI line; and optical integral
field unit spectroscopy observations with Multi Unit Spectroscopic
Explorer (MUSE) at the Very Large Telescope (VLT). Moreover, we
analysed archival carbon monoxide (CO) and broad-band data for this
galaxy. The atomic gas distribution of NGC3278 is not centred on the
optical galaxy centre, but instead around a third of atomic gas
resides in the region close to the SN position. This galaxy has a few
times lower atomic and molecular gas masses than predicted from its
star formation rate (SFR). Its specific star formation rate
(sSFR=SFR/M*) is ∼2-3 times higher than the main-sequence value,
placing it at the higher end of the main sequence towards starburst
galaxies. SN 2009bb exploded close to the region with the highest SFR
density and the lowest age, as evident from high Halpha EW,
corresponding to the age of the stellar population of ∼5.5Myr.
Assuming this timescale was the lifetime of the progenitor star, its
initial mass would have been close to ∼36M☉. As for GRB hosts,
the gas properties of NGC3278 are consistent with a recent inflow of
gas from the intergalactic medium, which explains the concentration of
atomic gas close to the SN position and the enhanced SFR. Super-solar
metallicity at the position of the SN (unlike for most of GRBs) may
mean that relativistic explosions signal a recent inflow of gas (and
subsequent star-formation), and their type (GRBs or SNe) is determined
by either i) the metallicity of the inflowing gas (metal-poor gas
results in a GRB explosion and metal-rich gas in a relativistic SN
explosion without an accompanying GRB), or ii) by the efficiency of
gas mixing (efficient mixing for SN hosts leading to quick
disappearance of metal-poor regions), or iii) by the type of the
galaxy (more metal-rich galaxies would result in only a small fraction
of star-formation to be fuelled by metal-poor gas).
Description:
ATCA HI and VLT/MUSE IFU data for NGC 3278 (SN 2009bb host).
Objects:
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RA (2000) DE Designation(s)
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10 31 33.92 -39 57 30.0 SN 2009bb = SN 2009bb
10 31 35.39 -39 57 17.0 NGC 3278 = ESO 317- G 043
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 113 139 Properties of star-forming regions derived
from the MUSE data
list.dat 173 16 List of fits files
fits/* . 16 Individual fits files
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See also:
J/ApJ/728/14 : Photometry of SN 2009bb (Pignata+, 2011)
J/other/Nat/463.513 : Radio observations of SN 2009bb (Soderberg+, 2010)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.7 deg RAdeg ?=- Right ascension (J2000)
13- 23 F11.7 deg DEdeg ?=- Declination (J2000)
25- 30 F6.2 pix Xpos ?=- Muse X position
32- 37 F6.2 pix Ypos ?=- Muse Y position
39- 43 F5.2 arcsec Distc ?=- Distance from the galaxy centre
45- 49 F5.2 arcsec Distdpc ?=- Deprojected distance from the galaxy
centre (Sect. 2.3)
51- 54 I4 10-19W/m2 FHa Hα flux in 10-16erg/s/cm2
56- 60 F5.1 0.1nm EWHa Hα equivalent width
62- 67 F6.3 --- SFR 10-3M/yr Star formation rate
69- 73 F5.3 10+9Msun M* Stellar mass
75- 79 F5.3 Gyr-1 sSFR Specific star formation rate (SFR/M*)
81- 84 F4.2 mag E(B-V) Extinction
86- 89 F4.2 --- D16 12+log(O/H) metallicity based on [SII], [NII],
and Hα fluxes (Dopita et al.,
2016Ap&SS.361...61D 2016Ap&SS.361...61D)
91- 94 F4.2 --- O3N2 ?=- 12+log(O/H) metallicity based on [OII],
[NII], Hα, and Hβ lines
(Pettini & Pagel 2004MNRAS.348L..59P 2004MNRAS.348L..59P)
96- 99 F4.2 --- N2 12+log(O/H) metallicity based on [NII] and
Hα lines (Pettini & Pagel
2004MNRAS.348L..59P 2004MNRAS.348L..59P)
101-113 A13 --- Note Note (1)
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Note (1): The first row is the SN 2009bb position and the second is the centre
of the galaxy. The last row shows the sum of the individual regions for
extensive properties (Hαi flux and SFR) and the average for the
intensive properties (equivalent width, extinction, and metallicities).
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Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 22 F3.1 arcsec/pix scale ? Scale of the image
24- 26 I3 --- Nx Number of pixels along X-axis
28- 30 I3 --- Ny Number of pixels along Y-axis
32- 35 I4 --- Nz ? Number of slices
37- 57 A21 --- Obs.Date Observation date (YYYY-MM-DDThh:mm:ss.s)
59- 65 I7 Kibyte size Size of FITS file
67-107 A41 --- FileName Name of FITS file, in subdirectory fits
109-173 A65 --- Title Title of the FITS file
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Acknowledgements:
Michal Michalowski, mj.michalowski(at)gmail.com
(End) Michal Michalowski [AMU, Poznan, PL], Patricia Vannier [CDS] 27-Jul-2018