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EMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-Poor Galaxies: A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension
Akinori Matsumoto, Masami Ouchi, Kimihiko Nakajima +42
The primordial He abundance is a powerful probe of cosmology. Currently, is best determined by observations of metal-poor galaxies, while there are on…
High Precision Analyses of Lyman alpha Damping Wing of Gamma-Ray Bursts in the Reionization Era: On the Controversial Results from GRB 130606A at z = 5.91
Tomonori Totani, Kentaro Aoki, Takashi Hattori +1
The unprecedentedly bright afterglow of Swift GRB 130606A at z = 5.91 gave us a unique opportunity to probe the reionization era by high precision analyses of the redward damping w…
Extended Lyman-alpha emission from a high-z DLA at z=3.115
Nobunari Kashikawa, Toru Misawa, Yosuke Minowa +5
We searched for star formation activity associated with high-z Damped Lyman-alpha systems (DLAs) with Subaru telescope. We used a set of narrow-band (NB) filters whose central wave…
Multi-Wavelength Studies of Spectacular Ram Pressure Stripping of a Galaxy. II. Star Formation in the Tail
Masafumi Yagi, Liyi Gu, Yutaka Fujita +5
With multiband photometric data in public archives, we detected four intracluster star-forming regions in the Virgo cluster. Two of them were at a projected distance of 35 kpc away…
Discovery of nine extended ionized gas clouds in a z=0.4 cluster
Masafumi Yagi, Liyi Gu, Yusei Koyama +4
From deep H-alpha imaging data of Suprime-Cam/Subaru, we discovered nine extended ionized gas clouds (EIG) around galaxies in Abell 851 cluster (A851) at z=0.4. We surveyed 30 x 25…
The very energetic, broad-lined type Ic Supernova 2010ah (PTF10bzf) in the context of GRB/SNe
Paolo A. Mazzali, Emma S. Walker, Elena Pian +4
SN2010ah, a very broad-lined type Ic SN discovered by the Palomar Transient Factory, was interesting because of its relatively high luminosity and the high velocity of the absorpti…