J/MNRAS/495/4860 Studying Type II supernovae using the DES (de Jaeger+, 2020)
Studying Type II supernovae as cosmological standard candles using the Dark
Energy Survey.
de Jaeger T., Galbany L., Gonzalez-Gaitan S., Kessler R., Filippenko A.V.,
Forster F., Hamuy M., Brown P.J., Davis T.M., Gutierrez C.P., Inserra C.,
Lewis G.F., Moller A., Scolnic D., Smith M., Brout D., Carollo D.,
Foley R.J., Glazebrook K., Hinton S.R., Macaulay E., Nichol B., Sako M.,
Sommer N.E., Tucker B.E., Abbott T.M.C., Aguena M., Allam S., Annis J.,
Avila S., Bertin E., Bhargava S., Brooks D., Burke D.L., Carnero Rosell A.,
Carrasco Kind M., Carretero J., Costanzi M., Crocce M., da Costa L.N.,
De Vicente J., Desai S., Diehl H.T., Doel P., Drlica-Wagner A.,
Eifler T.F., Estrada J., Everett S., Flaugher B., Fosalba P., Frieman J.,
Garcia-Bellido J., Gaztanaga E., Gruen D., Gruendl R.A., Gschwend J.,
Gutierrez G., Hartley W.G., Hollowood D.L., Honscheid K., James D.J.,
Kuehn K., Kuropatkin N., Li T.S., Lima M., Maia M.A.G., Menanteau F.,
Miquel R., Palmese A., Paz-Chinchon F., Plazas A.A., Romer A.K.,
Roodman A., Sanchez E., Scarpine V., Schubnell M., Serrano S.,
Sevilla-Noarbe I., Soares-Santos M., Suchyta E., Swanson M.E.C., Tarle G.,
Thomas D., Tucker D.L., Varga T.N., Walker A.R., Weller J., Wilkinson R.,
(the DES Collaboration)
<Mon. Not. R. Astron. Soc., 495, 4860-4892 (2020)>
=2020MNRAS.495.4860D 2020MNRAS.495.4860D (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, ugriz ; Redshifts
Keywords: (stars:) supernovae: general - galaxies: distances and redshifts -
(cosmology:) distance scale
Abstract:
Despite vast improvements in the measurement of the cosmological
parameters, the nature of dark energy and an accurate value of the
Hubble constant (H0) in the Hubble-Lemaitre law remain unknown. To
break the current impasse, it is necessary to develop as many
independent techniques as possible, such as the use of Type II
supernovae (SNe II). The goal of this paper is to demonstrate the
utility of SNe II for deriving accurate extragalactic distances, which
will be an asset for the next generation of telescopes where
more-distant SNe II will be discovered. More specifically, we present
a sample from the Dark Energy Survey Supernova Program (DES-SN)
consisting of 15 SNe II with photometric and spectroscopic information
spanning a redshift range up to 0.35. Combining our DES SNe with
publicly available samples, and using the standard candle method
(SCM), we construct the largest available Hubble diagram with SNe II
in the Hubble flow (70 SNe II) and find an observed dispersion of
0.27mag. We demonstrate that adding a colour term to the SN II
standardization does not reduce the scatter in the Hubble diagram.
Although SNe II are viable as distance indicators, this work points
out important issues for improving their utility as independent
extragalactic beacons: find new correlations, define a more standard
subclass of SNe II, construct new SN II templates, and dedicate more
observing time to high-redshift SNe II. Finally, for the first time,
we perform simulations to estimate the redshift-dependent
distance-modulus bias due to selection effects.
Description:
In this work, we update the Hubble diagram published by de Jaeger et
al. (2017MNRAS.472.4233D 2017MNRAS.472.4233D) with SNe II from DES-SN (Bernstein et al.
2012ApJ...753..152B 2012ApJ...753..152B; Brout et al. 2019ApJ...874..106B 2019ApJ...874..106B,
2019ApJ...874..150B 2019ApJ...874..150B, Cat. J/ApJ/874/150). For completeness, readers
are reminded that the sample from de Jaeger et al.
(2017MNRAS.472.4233D 2017MNRAS.472.4233D) consists of SNe II from four different surveys:
the Carnegie Supernova Project-I (CSP-I
(http://csp.obs.carnegiescience.edu/); Hamuy et al.
2006PASP..118....2H 2006PASP..118....2H), the Sloan Digital Sky Survey-II SN Survey
(SDSS-II (http://classic.sdss.org/supernova/aboutsupernova.html);
Frieman et al. 2008AJ....135..338F 2008AJ....135..338F), the Supernova Legacy Survey
(SNLS; Astier et al. 2006A&A...447...31A 2006A&A...447...31A; Perrett et al.
2010AJ....140..518P 2010AJ....140..518P), and the Subaru HSC Survey (Miyazaki et al.
2012SPIE.8446E..0ZM; Aihara et al. 2018PASJ...70S...4A 2018PASJ...70S...4A).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 61 56 Spectroscopically classified SNe II
tablec1.dat 78 2330 DES-SN sample photometry
tablec2.dat 66 45 Journal of spectroscopic observations of SN II
DES-SN sample
tabled1.dat 117 90 The supernova sample
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See also:
J/ApJ/874/150 : The first 3yrs of DES-SN (DES-SN3YR) (Brout+, 2019)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Supernova name (DESNNANaaa)
12- 17 F6.4 --- zCMB Heliocentric redshift
19- 25 A7 --- Cut Sample cut (1)
27- 61 A35 --- Comments Comments
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Note (1): Sample cut as follows:
SCM = useful for cosmology
PHOT = not enough data
EXP = no explosion date
SPEC = no spectrum
P-Cygni = no clear P-Cygni profile
LC = unusual light curves
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Byte-by-byte Description of file: tablec1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Supernova name (DESNNANaaa)
12- 18 F7.1 d MJD Modified Julian date
20- 25 F6.3 mag gmag ? DES g-band magnitude
27- 31 F5.3 mag e_gmag ? Error on gmag
33 A1 --- f_gmag [*] Flag on gmag (1)
35- 40 F6.3 mag rmag ? DES r-band magnitude
42- 46 F5.3 mag e_rmag ? Error on rmag
48 A1 --- f_rmag [*] Flag on rmag (1)
50- 55 F6.3 mag imag ? DES i-band magnitude
57- 61 F5.3 mag e_imag ? Error on imag
63 A1 --- f_imag [*] Flag on imag (1)
65- 70 F6.3 mag zmag ? DES z-band magnitude
72- 76 F5.3 mag e_zmag ? Error on zmag
78 A1 --- f_zmag [*] Flag on zmag (1)
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Note (1): Flag as follows:
* = The given magnitude and error are real points with flux/err<3
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Byte-by-byte Description of file: tablec2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Supernova name (DESNNANaaa)
12- 21 I10 "Y:M:D" Date Date of the spectroscopic observation
23- 29 F7.1 d MJD Modified Julian date
31- 34 F4.1 d Epoch Epoch after explosion
36- 43 A8 --- Tel Telescope used to obtain the spectrum (1)
45- 55 A11 --- Inst Instrument used to obtain the spectrum
57- 60 I4 0.1nm lambdamin Wavelength range (minimum value)
62- 66 I5 0.1nm lambdamax Wavelength range (maximum value)
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Note (1): Telescope as follows:
AAT = Anglo-Australian 3.9m telescope at the Siding Spring Observatory
in Australia
VLT = 8.2m Unit Telescope 2 of the Very Large Telescope at the Paranal
Observatory in Chile
Keck-II = 10m Keck-II telescope on the Mauna Kea Observatory in Hawaii
Magellan = 6.5m Magellan Telescopes at Las Campanas Observatory in Chile
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Byte-by-byte Description of file: tabled1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Supernova name
12- 17 F6.4 mag AVG Reddening owing to dust in our Galaxy
(Schlafly & Finkbeiner 2011ApJ...737..103S 2011ApJ...737..103S)
19- 23 F5.3 --- zCMB Host-galaxy velocity in the CMB frame
using the CMB dipole model presented by
Fixsen et al. (1996ApJ...473..576F 1996ApJ...473..576F)
25- 30 F6.4 --- e_zCMB Error on zCMB
32- 38 F7.1 d MJD Modified Julian date of the explosion
40- 42 F3.1 d e_MJD Error on MJD
44- 48 F5.2 mag imag i-band magnitude 43 days post-explosion
50- 53 F4.2 mag e_imag Error on imag
55- 60 F6.3 mag r-i r-i colour 43 days post-explosion
62- 66 F5.3 mag e_r-i Error on r-i
68- 72 F5.2 10-2mag/d s2 Plateau slope
74- 77 F4.2 10-2mag/d e_s2 Error on s2
79- 82 I4 km/s vHbeta ? Hβ velocity 43 days post-explosion
84- 87 I4 km/s e_vHbeta ? Error on vHbeta
89- 93 F5.2 mag muSCM ? Distance modulus measured using the
standard candle method (SCM)
95- 98 F4.2 mag e_muSCM ? Error on muSCM
100- 104 F5.2 mag muPCM Distance modulus measured using the
photometric colour method (PCM)
106- 109 F4.2 mag e_muPCM Error on muPCM
111- 117 A7 --- Camp Survey from which the SN II originates (1)
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Note (1): Survey as follows:
CSP-I = Carnegie Supernova Project-I (Hamuy et al. 2006PASP..118....2H 2006PASP..118....2H)
(40/90)
SDSS-II = Sloan Digital Sky Survey-II SN Survey (Frieman et al.
2008AJ....135..338F 2008AJ....135..338F) (13/90)
SNLS = Supernova Legacy Survey (Astier et al. 2006A&A...447...31A 2006A&A...447...31A;
Perrett et al. 2010AJ....140..518P 2010AJ....140..518P) (14/90)
DES-SN = Dark Energy Survey Supernova Program (Bernstein et al.
2012ApJ...753..152B 2012ApJ...753..152B; Brout et al. 2019ApJ...874..106B 2019ApJ...874..106B,
2019ApJ...874..150B 2019ApJ...874..150B) (22/90)
HSC = Subaru HSC Survey (Miyazaki et al. 2012SPIE.8446E..0ZM;
Aihara et al. 2018PASJ...70S...4A 2018PASJ...70S...4A) (1/90)
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 26-Jun-2023