Výsledky vyhledávání - "Suzuka Koyamada"

Multiple Absorption Systems in the Lines of Sight to Quadruply Lensed Quasar H1413+1143 As a Probe of the Circumgalactic medium around Dwarf Galaxy

Autor: Toru Misawa, Nobunari Kashikawa, Katsuya Okoshi, Suzuka Koyamada, Yosuke Minowa

Publikováno v: Proceedings of the International Astronomical Union. 14:305-308

We present the first measurement of differences in MgII absorption strength in multiple intervening absorbers, which are also identified as (sub-)Damped Lyman alpha absorption systems, in the four spectra of the quadruply lensed quasar H1413+1143, of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b2cdb1a1e1c2b54d54c9ae9825bcb2d9
https://doi.org/10.1017/s1743921318006683

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Spectroscopic Observations of the Outflowing Wind in the Lensed Quasar SDSS J1001+5027

Autor: Masamune Oguri, Jane C. Charlton, Michael Eracleous, Toru Misawa, Suzuka Koyamada, Naohisa Inada, Daisuke Itoh

We performed spectroscopic observations of the small-separation lensed quasar SDSS J1001+5027, whose images have an angular separation q = 2 ''.86, and placed constraints on the physical properties of gas clouds in the vicinity of the quasar (i.e., i

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Optical Variability Properties of Mini-BAL and NAL Quasars

Autor: Suzuka Koyamada, Takashi Horiuchi, Tomoki Morokuma, Toru Misawa, Hisashi Wada, Kazuma Takahashi

While narrow absorption lines (NALs) are relatively stable, broad absorption lines (BALs) and mini-BAL systems usually show violent time variability within a few years via a mechanism that is not yet understood. In this study, we examine variable ion

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d63245ed4bac66729f3527092090dfc7
http://arxiv.org/abs/1604.01884

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Resolving the Internal Structure of Circumgalactic Medium Using Gravitationally Lensed Quasars

Autor: Naohisa Inada, Toru Misawa, Suzuka Koyamada, Katsuya Okoshi, Nobunari Kashikawa, Masamune Oguri

Publikováno v: The Astrophysical Journal. 851:88

We study the internal structure of the Circum-Galactic Medium (CGM), using 29 spectra of 13 gravitationally lensed quasars with image separation angles of a few arcseconds, which correspond to 100 pc to 10 kpc in physical distances. After separating

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9929cfdf815eae3d475c735244b75e1
https://doi.org/10.3847/1538-4357/aa9a3a

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RESOLVING THE CLUMPY STRUCTURE OF THE OUTFLOW WINDS IN THE GRAVITATIONALLY LENSED QUASAR SDSS J1029+2623

Autor: Suzuka Koyamada, Toru Misawa, Rina Okamoto, Naohisa Inada, Takashi Horiuchi, Masamune Oguri, Poshak Gandhi

Publikováno v: ASTROPHYSICAL JOURNAL LETTERS. 794(2):L20

We study the geometry and the internal structure of the outflowing wind from the accretion disk of a quasar by observing multiple sightlines with the aid of strong gravitational lensing. Using Subaru/High Dispersion Spectrograph, we performed high-re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::145df948c82f3a742649f16a2bdb1208
https://soar-ir.repo.nii.ac.jp/records/15839

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