J/A+A/679/A95 Type Ia infrared data (Galbany+, 2023)
An updated measurement of the Hubble constant from near-infrared observations of
Type Ia supernovae.
Galbany L., de Jaeger T., Riess A.G., Mueller-Bravo T., Dhawan S., Phan K.,
Stritzinger M.D., Karamehmetoglu E. Leibundgut B., Burns C., Peterson E.,
Kenworthy W.D., Johansson J., Maguire K., Jha S.W.
<Astron. Astrophys. 679, A95 (2023)>
=2023A&A...679A..95G 2023A&A...679A..95G (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, infrared
Keywords: supernovae: general - galaxies: distances and redshifts -
cosmological parameters
Abstract:
We present a measurement of the Hubble constant (H0) using type Ia
supernova (SNe Ia) in the near-infrared (NIR) from the recently
updated sample of SNe Ia in nearby galaxies with distances measured
via Cepheid period-luminosity relations by the SHOES project. We
collect public near-infrared photometry of up to 19 calibrator SNe Ia
and further 57 SNe Ia in the Hubble flow (z>0.01), and directly
measure their peak magnitudes in the J and H band by Gaussian
processes and spline interpolation. Calibrator peak magnitudes
together with Cepheid-based distances are used to estimate the average
absolute magnitude in each band, while Hubble-flow SNe are used to
constrain the zero-point intercept of the magnitude-redshift relation.
Our baseline result of H0 is 72.3±1.4 (stat) ±1.4 (syst) km/s/Mpc
in the J band and 72.3±1.3 (stat) ±1.4 (syst) km/s/Mpc in the H
band, where the systematic uncertainties include the standard
deviation of up to 21 variations of the analysis, the 0.7% distance
scale systematic from SHOES Cepheid anchors, a photometric zeropoint
systematic, and a cosmic variance systematic. Our final measurement
represents a measurement with a precision of 2.8% in both bands. Among
all analysis variants the largest change in H0 comes from limiting the
sample to those SNe from the CSP and CfA programmes, noteworthy
because these are the best calibrated, yielding H0∼75km/s/Mpc in
both bands. We explore applying stretch and reddening
corrections to standardize SN Ia NIR peak magnitudes, and we
demonstrate they are still useful to reduce the absolute magnitude
scatter improving its standardization, at least up to the H band.
Based on our results, in order to improve the precision of the H0
measurement with SNe Ia in the NIR in the future, we would need to
increase the number of calibrator SNe Ia, be able to extend the
Hubble-Lemaitre diagram to higher redshift, and include
standardization procedures to help reducing the NIR intrinsic scatter.
Description:
We fitted UV+optical+NIR light curves of both the calibrator and the
Hubble-flow samples with SNooPy, using the EBV_model2 and max_model
models with #x0394;m15 as a light curve width parameter.
When using the EBV_model2, the fitter provides an estimate of the time
of maximum in the B-band Tmax,B, the light curve width parameter
#x0394;m15 in the B-band, and the color excess at peak E(B-V).
Moreover, we also obtain the J- and H-band peak magnitude given by the
template.
We obtained the time of maximum Tmax,B and light curve width
parameter #x0394;m15 in the B-band, and the J- and H-band time of
maximum and peak magnitude . All these parameters are listed in
tablec1.dat.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 145 76 SNooPy maxmodel and EBVmodel2, only EBV
parameter, template fitting results
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Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Supernova name
11- 34 A24 --- Host Host galaxy name
36- 50 A15 --- Morph Host galaxy morphology
52- 59 F8.2 d TmaxB Time of maximum in the B band (MJD)
61- 64 F4.2 d e_TmaxB Error on Time of maximum in the B band
66- 70 F5.3 mag Dm15 Delta m 15 stretch parameter
72- 76 F5.3 mag e_Dm15 Error on Delta m 15 stretch parameter
78- 83 F6.3 mag E(B-V) Color excess
85- 89 F5.3 mag e_E(B-V) Error on color excess
91- 95 F5.3 --- sBV Color-stretch parameter
97-101 F5.3 --- e_sBV Error on color-stretch parameter
103-110 F8.2 d TmaxJ ? Time of maximum in the J band (MJD)
112-117 F6.3 mag Jmax ? Magnitude at maximum in the J band
119-123 F5.3 mag e_Jmax ? Error on magnitude at maximum in the J band
125-132 F8.2 d TmaxH Time of maximum in the H band (MJD)
134-139 F6.3 mag Hmax Magnitude at maximum in the H band
141-145 F5.3 mag e_Hmax Error on magnitude at maximum in the H band
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Acknowledgements:
Lluis Galbany, l.g(at)csic.es
(End) Lluis Galbany [ICE-CSIC, Spain], Patricia Vannier [CDS] 19-Sep-2023