Stellar Metallicities and Type Ia Supernova Rates in the Early‐Type Galaxy NGC 5846 fromROSATandASCAObservations

1999 ◽  
Vol 514 (2) ◽  
pp. 844-855 ◽  
Author(s):  
A. Finoguenov ◽  
C. Jones ◽  
W. Forman ◽  
L. David
Keyword(s):  
Early Type ◽  
Type Ia Supernova ◽  
Type Ia ◽  
Early Type Galaxy

scholarly journals THE LUMINOSITY OF TYPE IA SUPERNOVA AND THE PROPERTIES OF THEIR EARLY-TYPE HOST GALAXIES

2015 ◽  
Vol 30 (2) ◽  
pp. 487-488
Author(s):  
YIJUNG KANG ◽  
YOUNG-LO KIM ◽  
YOUNG-WOOK LEE ◽  
DONGWOOK LIM ◽  
CHUL CHUNG ◽  
...  
Keyword(s):  
Early Type ◽  
Host Galaxies ◽  
Type Host ◽  
Type Ia Supernova ◽  
Type Ia

scholarly journals H α emission in the nebular spectrum of the Type Ia supernova ASASSN-18tb

2019 ◽  
Vol 486 (3) ◽  
pp. 3041-3046 ◽  
Author(s):  
Juna A Kollmeier ◽  
Ping Chen ◽  
Subo Dong ◽  
Nidia Morrell ◽  
M M Phillips ◽  
...  
Keyword(s):  
Emission Line ◽  
Early Type ◽  
High Luminosity ◽  
Homogeneous Sample ◽  
Star Forming ◽  
Type Ia ◽  
Rare Class ◽  
Ia Supernovae ◽  
Phase Spectra ◽  
Early Type Galaxy

ABSTRACT As part of the 100IAS survey, a program aimed to obtain nebular-phase spectra for a volume-limited and homogeneous sample of Type Ia supernovae (SNe Ia), we observed ASASSN-18tb (SN 2018fhw) at 139 d past maximum light. ASASSN-18tb was a fast-declining, sub-luminous event that fits well within the observed photometric and spectroscopic distributions of the SN Ia population. We detect a prominent H α emission line (LH α = 2.2 ± 0.2 × 1038 ergs s−1) with FWHM ≈ 1100 km s−1 in the nebular-phase spectrum of this SN Ia. High-luminosity H α emission (LH α ≳ 1040 ergs s−1) has previously been discovered in a rare class of SNe Ia-like objects showing circum-stellar medium (CSM) interactions (SNe Ia–CSM). They predominantly belong to overluminous (Mmax < −19 mag in optical) 1991T-like SNe Ia and are exclusively found in star-forming galaxies. By contrast, ASASSN-18tb is a sub-luminous SN Ia (MB,max ∼ −17.7 mag) found in an early-type galaxy dominated by old stellar populations. We discuss possible origins for the observed hydrogen. Of the 75 SNe Ia for which we have so far obtained nebular spectra in 100IAS, no other SN shows a ${\sim } 1000 \, {\rm km\, s^{-1}}$ H α emission line with comparable line luminosity as ASASSN-18tb, emphasizing the rarity of such emission in the nebular phase. Based on preliminary results from our survey, the rate for ASASSN-18tb-like nebular H α emission could be as high as ${\sim } 10{{\ \rm per\ cent}}$ among sub-luminous SNe Ia.

scholarly journals Nearby Supernova Factory Observations of SN 2006D: On Sporadic Carbon Signatures in Early Type Ia Supernova Spectra

2006 ◽  
Vol 654 (1) ◽  
pp. L53-L56 ◽  
Author(s):  
R. C. Thomas ◽  
G. Aldering ◽  
P. Antilogus ◽  
C. Aragon ◽  
S. Bailey ◽  
...  
Keyword(s):  
Early Type ◽  
Type Ia Supernova ◽  
Type Ia

scholarly journals SUPERSOFT X-RAY PHASE OF SINGLE DEGENERATE TYPE Ia SUPERNOVA PROGENITORS IN EARLY-TYPE GALAXIES

2010 ◽  
Vol 724 (2) ◽  
pp. L212-L216 ◽  
Author(s):  
Izumi Hachisu ◽  
Mariko Kato ◽  
Ken'ichi Nomoto
Keyword(s):  
Early Type ◽  
X Ray ◽  
Type Ia Supernova ◽  
Type Ia ◽  
Degenerate Type

scholarly journals EXPLORING THE POTENTIAL DIVERSITY OF EARLY TYPE IA SUPERNOVA LIGHT CURVES

2016 ◽  
Vol 826 (1) ◽  
pp. 96 ◽  
Author(s):  
Anthony L. Piro ◽  
Viktoriya S. Morozova
Keyword(s):  
Light Curves ◽  
Early Type ◽  
Type Ia Supernova ◽  
Type Ia

scholarly journals Survey of Gravitationally Lensed Objects in HSC Imaging (SuGOHI) – VII. Discovery and confirmation of three strongly lensed quasars†

2021 ◽  
Vol 502 (1) ◽  
pp. 1487-1493
Author(s):  
Anton T Jaelani ◽  
Cristian E Rusu ◽  
Issha Kayo ◽  
Anupreeta More ◽  
Alessandro Sonnenfeld ◽  
...  
Keyword(s):  
Spectroscopic Data ◽  
Point Sources ◽  
Sloan Digital Sky Survey ◽  
Early Type ◽  
Blue Point ◽  
X Ray ◽  
Quasar Spectra ◽  
Strategic Program ◽  
Early Type Galaxy

ABSTRACT We present spectroscopic confirmation of three new two-image gravitationally lensed quasars, compiled from existing strong lens and X-ray catalogues. Images of HSC J091843.27–022007.5 show a red galaxy with two blue point sources at either side, separated by 2.26 arcsec. This system has a source and a lens redshifts zs = 0.804 and zℓ = 0.459, respectively, as obtained by our follow-up spectroscopic data. CXCO J100201.50+020330.0 shows two point sources separated by 0.85 arcsec on either side of an early-type galaxy. The follow-up spectroscopic data confirm the fainter quasar has the same redshift with the brighter quasar from the Sloan Digital Sky Survey (SDSS) fiber spectrum at zs = 2.016. The deflecting foreground galaxy is a typical early-type galaxy at a redshift of zℓ = 0.439. SDSS J135944.21+012809.8 has two point sources with quasar spectra at the same redshift zs = 1.096, separated by 1.05 arcsec, and fits to the HSC images confirm the presence of a galaxy between these. These discoveries demonstrate the power of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP)’s deep imaging and wide sky coverage. Combined with existing X-ray source catalogues and follow-up spectroscopy, the HSC-SSP provides us unique opportunities to find multiple-image quasars lensed by a foreground galaxy.

scholarly journals Ultradiffuse galaxies in the IC 1459 group from the VEGAS survey

2020 ◽  
Vol 494 (4) ◽  
pp. 5293-5297
Author(s):  
Duncan A Forbes ◽  
Bililign T Dullo ◽  
Jonah Gannon ◽  
Warrick J Couch ◽  
Enrichetta Iodice ◽  
...  
Keyword(s):  
Globular Clusters ◽  
Compact Objects ◽  
Early Type ◽  
Group Members ◽  
Measurement Uncertainties ◽  
Stellar Masses ◽  
Double Nucleus ◽  
Early Type Galaxy

ABSTRACT Using deep g, r, i imaging from the VST Early-type GAlaxy Survey (VEGAS), we have searched for ultradiffuse galaxies (UDGs) in the IC 1459 group. Assuming they are group members, we identify nine galaxies with physical sizes and surface brightnesses that match the UDG criteria within our measurement uncertainties. They have mean colours of g − i = 0.6 and stellar masses of ∼108 M⊙. Several galaxies appear to have associated systems of compact objects, e.g. globular clusters. Two UDGs contain a central bright nucleus, with a third UDG revealing a remarkable double nucleus. This appears to be the first reported detection of a double nucleus in a UDG – its origin is currently unclear.

scholarly journals THE GOLDEN STANDARD TYPE Ia SUPERNOVA 2005cf: OBSERVATIONS FROM THE ULTRAVIOLET TO THE NEAR-INFRARED WAVEBANDS

2009 ◽  
Vol 697 (1) ◽  
pp. 380-408 ◽  
Author(s):  
X. Wang ◽  
W. Li ◽  
A. V. Filippenko ◽  
R. J. Foley ◽  
R. P. Kirshner ◽  
...  
Keyword(s):  
Near Infrared ◽  
Standard Type ◽  
Type Ia Supernova ◽  
Type Ia ◽  
Golden Standard
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