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High-resolution ALMA observations of SDP.81. I. The innermost mass profile of the lensing elliptical galaxy probed by 30 milli-arcsecond images

Tamura, Yoichi; Oguri, Masamune; Hayashi, Masao +3 more

We report the detailed modeling of the mass profile of a z = 0.2999 massive elliptical galaxy using 30 milli-arcsecond resolution 1 mm Atacama Large Millimeter/submillimeter Array (ALMA) images of the galaxy-galaxy lensing system SDP.81. The detailed morphology of the lensed multiple images of the z = 3.042 infrared-luminous galaxy, which is found…

High-resolution ALMA observations of SDP.81. II. Molecular clump properties of a lensed submillimeter galaxy at z = 3.042

Tamura, Yoichi; Oguri, Masamune; Hayashi, Masao +3 more

We present spatially resolved properties of molecular gas and dust in a gravitationally lensed submillimeter galaxy H-ATLAS J090311.6+003906 (SDP.81) at z = 3.042 revealed by the Atacama Large Millimeter/submillimeter Array (ALMA). We identified 14 molecular clumps in the CO(5-4) line data. The surface density of molecular gas (Σ _H_2) and star-fo…

Indications of M-dwarf deficits in the halo and thick disk of the Galaxy

Henning, Thomas; Terada, Hiroshi; Usuda, Tomonori +55 more

We compared the number of faint stars detected in deep survey fields with the current stellar distribution model of the Galaxy and found that the detected number in the H band is significantly smaller than the predicted number. This indicates that M-dwarfs, the major component, are fewer in the halo and the thick disk. We used archived data of sev…

Witness of gas infall and outflow in the young starburst dwarf galaxy NGC 5253

Hirota, Akihiko; Nakanishi, Kouichiro; Espada, Daniel +2 more

We present ¹²CO(2-1) observations towards the dwarf galaxy NGC 5253 using the Submillimeter Array. The data shows that a large amount of molecular gas is located in the central ∼ 200 pc starburst region, physically associated with two young super stellar clusters (SSCs). The molecular gas traced by ¹²CO(2-1) is elongated alon…

An obscured narrow-line Seyfert 1 galaxy candidate, Mrk 1388 with nonthermal jets

Doi, Akihiro

Mrk 1388 has an unusual Seyfert nucleus that shows narrow emission-line components without broad emission-line ones, but shows a strong featureless continuum and strong iron-forbidden, high-ionization emission lines. The apparent coexistence of type-1/2 characteristics is potentially attributed to a heavily obscured broad-line region or to an inte…

Physical properties of distant red galaxies in the COSMOS/UltraVISTA field

Fang, Guanwen; Kong, Xu; Fan, Lulu +1 more

We present a study on physical properties for a large distant red galaxy (DRG) sample, using the K-selected multi-band photometry catalog of the COSMOS/UltraVISTA field and the CANDELS near-infrared data. Our sample includes 4485 DRGs with (J - K)_AB > 1.16 and K_AB < 23.4 mag, and 132 DRGs have HST/WFC3 morphological mea…