The Hubble constant from two sibling Type Ia supernovae in the nearby galaxy NGC 4414: SN 1974G and SN 2021J
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The Hubble constant from two sibling Type Ia supernovae in the nearby galaxy NGC 4414 : SN 1974G and SN 2021J. / Gallego-Cano, Eulalia; Izzo, Luca; Dominguez-Tagle, Carlos; Prada, Francisco; Perez, Enrique; Khetan, Nandita; Jang, In Sung.
I: Astronomy & Astrophysics, Bind 666, A13, 29.09.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - The Hubble constant from two sibling Type Ia supernovae in the nearby galaxy NGC 4414
T2 - SN 1974G and SN 2021J
AU - Gallego-Cano, Eulalia
AU - Izzo, Luca
AU - Dominguez-Tagle, Carlos
AU - Prada, Francisco
AU - Perez, Enrique
AU - Khetan, Nandita
AU - Jang, In Sung
PY - 2022/9/29
Y1 - 2022/9/29
N2 - Having two "sibling" Type Ia supernovae (SNe Ia) in the same galaxy offers additional advantages in reducing a variety of systematic errors involved in estimating the Hubble constant, H-0. NGC 4414 is a nearby galaxy included in the Hubble Space Telescope Key Project to measure its distance using Cepheid variables. It hosts two sibling SNe Ia: SN 2021J and SN 1974G. This provides the opportunity to improve the precision of the previous estimate of H-0, which was based solely on SN 1974G. Here we present new optical BVRI photometry obtained at the Observatorio de Sierra Nevada and complement it with Swift UVOT UBV data, which cover the first 70 days of emission of SN 2021J. A first look at SN 2021J optical spectra obtained with the Gran Telescopio Canarias (GTC) reveals typical SN type Ia features. The main SN luminosity parameters for the two sibling SNe are obtained by using SNooPy, a light curve fitting code based on templates. Using a hierarchical bayesian approach, we build the Hubble diagram with a sample of 96 SNe Ia obtained from the Combined Pantheon Sample in the redshift range z = 0.02-0.075, and calibrate the zero point with the two sibling type-Ia SNe in NGC 4414. We report a value of the Hubble constant H-0 = 72.19 +/- 2.32 (stat.) +/- 3.42 (syst.) km s(-1) Mpc(-1). We expect a reduction of the systematic error after a new analysis of the Cepheids period-luminosity relation using the upcoming Gaia DR4 and additional Cepheids from the HST and JWST.
AB - Having two "sibling" Type Ia supernovae (SNe Ia) in the same galaxy offers additional advantages in reducing a variety of systematic errors involved in estimating the Hubble constant, H-0. NGC 4414 is a nearby galaxy included in the Hubble Space Telescope Key Project to measure its distance using Cepheid variables. It hosts two sibling SNe Ia: SN 2021J and SN 1974G. This provides the opportunity to improve the precision of the previous estimate of H-0, which was based solely on SN 1974G. Here we present new optical BVRI photometry obtained at the Observatorio de Sierra Nevada and complement it with Swift UVOT UBV data, which cover the first 70 days of emission of SN 2021J. A first look at SN 2021J optical spectra obtained with the Gran Telescopio Canarias (GTC) reveals typical SN type Ia features. The main SN luminosity parameters for the two sibling SNe are obtained by using SNooPy, a light curve fitting code based on templates. Using a hierarchical bayesian approach, we build the Hubble diagram with a sample of 96 SNe Ia obtained from the Combined Pantheon Sample in the redshift range z = 0.02-0.075, and calibrate the zero point with the two sibling type-Ia SNe in NGC 4414. We report a value of the Hubble constant H-0 = 72.19 +/- 2.32 (stat.) +/- 3.42 (syst.) km s(-1) Mpc(-1). We expect a reduction of the systematic error after a new analysis of the Cepheids period-luminosity relation using the upcoming Gaia DR4 and additional Cepheids from the HST and JWST.
KW - cosmology: observations
KW - galaxies: individual: NGC 4414
KW - distance scale
KW - supernovae: individual: SN 1974G
KW - supernovae: individual: SN 2021J
KW - TELESCOPE KEY PROJECT
KW - EXTRAGALACTIC DISTANCE SCALE
KW - SPACE-TELESCOPE
KW - COSMOLOGY
KW - CALIBRATION
KW - MAGNITUDES
KW - BRIGHTNESS
KW - PRECISE
U2 - 10.1051/0004-6361/202243988
DO - 10.1051/0004-6361/202243988
M3 - Journal article
VL - 666
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A13
ER -
ID: 322866013