340 citations · 4.2k across the 100 of their papers we have counts for
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Bright Type II Supernova 2023ixf in M101: A Quick Analysis of the Early-Stage Spectra and Near-Infrared Light Curves
Masayuki Yamanaka, Mitsugu Fujii, Takahiro Nagayama
We present early-stage analyses of low-resolution () optical spectra and near-infrared light curves of the bright Type II supernova (SN II) 2023ixf in the notable nearby fa…
Light and colour variations of Mira variables in the Small Magellanic Cloud
Yoshifusa Ita, John W. Menzies, Patricia A. Whitelock +6
The goal of this paper is to characterise the light variation properties of Mira variables in the Small Magellanic Cloud. We have investigated a combined optical and near infrared…
Magnetic stability of massive star forming clumps in RCW 106
Shohei Tamaoki, Koji Sugitani, Quang Nguyen-Luong +5
The RCW 106 molecular cloud complex is an active massive star-forming region where a ministarburst is taking place. We examined its magnetic structure by near-IR polarimetric obser…
Annual parallax measurements of a semiregular variable star SV Pegasus with VERA
Hiroshi Sudou, Toshihiro Omodaka, Kotone Murakami +6
Many studies have shown that there are clear sequences in the period-luminosity relationship (PLR) for Mira variables and semiregular variables (SRVs) in the Large Magellanic Cloud…
A near infrared variable star survey in the Magellanic Clouds: The Small Magellanic Cloud data
Yoshifusa Ita, Noriyuki Matsunaga, Toshihiko Tanabe +12
A very long term near-infrared variable star survey towards the Large and Small Magellanic Clouds was carried out using the 1.4m InfraRed Survey Facility at the South African Astro…
Faint warm debris disks around nearby bright stars explored by AKARI and IRSF
Daisuke Ishihara, Nami Takeuchi, Hiroshi Kobayashi +5
Context: Debris disks are important observational clues for understanding planetary-system formation process. In particular, faint warm debris disks may be related to late planet f…
V5852 Sgr: An Unusual Nova Possibly Associated with the Sagittarius Stream
E. Aydi, P. Mróz, P. A. Whitelock +16
We report spectroscopic and photometric follow-up of the peculiar nova V5852~Sgr (discovered as OGLE-2015-NOVA-01), which exhibits a combination of features from different nova cla…
J-GEM Follow-Up Observations to Search for an Optical Counterpart of The First Gravitational Wave Source GW150914
Tomoki Morokuma, Masaomi Tanaka, Yuichiro Asakura +22
We present our optical follow-up observations to search for an electromagnetic counterpart of the first gravitational wave source GW150914 in the framework of the Japanese collabor…
OISTER Optical and Near-Infrared Observations of the Super-Chandrasekhar Supernova Candidate SN 2012dn: Dust Emission from the Circumstellar Shell
Masayuki Yamanaka, Keiichi Maeda, Masaomi Tanaka +34
We present extensively dense observations of the super-Chandrasekhar supernova (SC SN) candidate SN 2012dn from to days after the date of its -band maximum in the o…
OISTER Optical and Near-Infrared Observations of Type Iax Supernova 2012Z
Masayuki Yamanaka, Keiichi Maeda, Koji S. Kawabata +30
We report observations of the Type Iax supernova (SN Iax) 2012Z at optical and near-infrared wavelengths from immediately after the explosion until days after the maxi…
Near-IR Imaging Polarimetry toward a Bright-Rimmed Cloud: Magnetic Field in SFO 74
Takayoshi Kusune, Koji Sugitani, Jingqi Miao +7
We have made near-infrared (JHKs) imaging polarimetry of a bright-rimmed cloud (SFO 74). The polarization vector maps clearly show that the magnetic field in the layer just behind…
New NIR light-curve templates for classical Cepheids
L. Inno, N. Matsunaga, M. Romaniello +22
We present new near-infrared (NIR) light-curve templates for fundamental (FU, JHK) and first overtone (FO, J) Cepheids. The new templates together with PL and PW relations provide…
Near-Infrared Evidence for a Sudden Temperature Increase in Eta Carinae
Andrea Mehner, Kazunori Ishibashi, Patricia Whitelock +4
Aims. Eta Car's ultra-violet, optical, and X-ray light curves and its spectrum suggest a physical change in its stellar wind over the last decade. It was proposed that the mass-los…
Observational study of the extremely slow nova V1280 Scorpii
H. Naito, S. Mizoguchi, A. Arai +10
We present multi-color light curves and optical spectra of V1280 Scorpii obtained from 2007 to 2012. It is shown that V1280 Sco is the extremely slow nova and the mass of white dwa…
Cepheids and other short-period variables near the Galactic Centre
Noriyuki Matsunaga, Michael W. Feast, Takahiro Kawadu +6
We report the result of our near-infrared survey of short-period variable stars (P<60d) in a field-of-view of 20'x30' towards the Galactic Centre. Forty-five variables are discover…
Five-Year Optical and Near Infrared Observations of the Extremely Slow Nova V1280 Scorpii
H. Naito, S. Mizoguchi, A. Arai +10
We present optical (, , , and ) and near infrared (, and ) photometric and spectroscopic observations of a classical nova V1280 Sc…
Three classical Cepheid variable stars in the nuclear bulge of the Milky Way
N. Matsunaga, T. Kawadu, S. Nishiyama +6
The nuclear bulge is a region with a radius of about 200 parsecs around the centre of the Milky Way. It contains stars with ages ranging from a few million years to over a billion…
Complex Scattered Radiation Fields and Multiple Magnetic Fields in the Protostellar Cluster in NGC 2264
Jungmi Kwon, Motohide Tamura, Ryo Kandori +9
Near-infrared (IR) imaging polarimetry in the J, H, and Ks bands has been carried out for the protostellar cluster region around NGC 2264 IRS 2 in the Monoceros OB1 molecular cloud…
Near-Infrared Imaging Polarimetry Toward Serpens South: Revealing the Importance of the Magnetic Field
K. Sugitani, F. Nakamura, M. Watanabe +9
The Serpens South embedded cluster, which is located at the constricted part in a long filamentary infrared dark cloud, is believed to be in very early stage of cluster formation.…
Binary microlensing event OGLE-2009-BLG-020 gives a verifiable mass, distance and orbit predictions
J. Skowron, A. Udalski, A. Gould +99
We present the first example of binary microlensing for which the parameter measurements can be verified (or contradicted) by future Doppler observations. This test is made possibl…
The expanding bipolar shell of the helium nova V445 Puppis
P. A. Woudt, D. Steeghs, M. Karovska +8
From multi-epoch adaptive optics imaging and integral field unit spectroscopy we report the discovery of an expanding and narrowly confined bipolar shell surrounding the helium nov…
A near-infrared survey of Miras and the distance to the Galactic Centre
Noriyuki Matsunaga, Takahiro Kawadu, Shogo Nishiyama +5
We report the results of a near-infrared survey for long-period variables in a field of view of 20 arcmin by 30 arcmin towards the Galactic Centre (GC). We have detected 1364 varia…