Takahiro Morishita

THE EVOLUTION OF GALAXY SIZE AND MORPHOLOGY AT z ∼ 0.5-3.0 IN THE GOODS-N REGION WITH HUBBLE SPACE TELESCOPE/WFC3 DATA

We analyze the recently released Hubble Space Telescope/Wide Field Camera 3 IR images in the GOODS-N region to study the formation and evolution of quiescent galaxies (QGs). After examining the reliability of two-dimensional light profiles with artificial galaxies, we obtain the morphological parameters with Sersic profile of 299 QGs and 1083 star-forming galaxies (SFGs) at z ~ 0.5-3.0, finding the evolution of r e and n of massive (M * ≥ 1010.5 M ☉) QGs and weaker evolution of SFGs and less massive (M * < 1010.5 M ☉) QGs. The regression of the size evolution of massive QGs follows with (a factor of ~2.2 increases from z ~ 2.5 to ~0.5), which is consistent with the general picture of the significant size growth. For the further understanding of the evolution scenario, we study the evolution of the Sersic index, n, and find that massive QGs significantly evolve as with α n = 0.74 ± 0.23 (n ~ 1 at z ~ 2.5 to n ~ 4 at z ~ 0.5), while those of the other populations are unchanged (n ~ 1) over the redshift range. The results in the present study are consistent with both observations and numerical simulations where a gas-poor minor merger is believed to be the main evolution scenario. By taking the connection with less massive QGs and SFGs into account, we discuss the formation and evolution of the massive QGs over Cosmic High Noon, or the peak of star-formation in the universe.

FROM DIVERSITY TO DICHOTOMY, AND QUENCHING: MILKY-WAY-LIKE AND MASSIVE-GALAXY PROGENITORS AT 0.5 < z < 3.0

Using the HST/WFC3 and ACS multi-band imaging data taken in CANDELS and 3D-HST, we study the general properties and the diversity of the progenitors of the Milky Way (MWs) and local massive galaxy (MGs) at 0.5 2.5 kpc) radius since z ~ 2. Although the radial mass profiles evolve in distinct ways, the formation and quenching of the central dense region (or bulge) ahead of the outer disk formation are found to be common for both systems. The sudden reddening of bulge at z ~ 1.6 and z ~ 2.4 for MWs and MGs, respectively, suggests the formation of bulge and would give a clue to the different gas accretion histories and quenching. A new approach to evaluate the morphological diversity is conducted by using the average surface density profile and its dispersion. The variety of the radial mass profiles for MGs peaks at higher redshift (z > 2.8), and then rapidly converges to more uniform shape at z < 1.5, while that for MWs remains in the outer region over the redshift. Compared with the observed star formation rates and color profiles, the evolution of variety is consistently explained by the star formation activities.

First Results from the KMOS Lens-Amplified Spectroscopic Survey (KLASS): Kinematics of Lensed Galaxies at Cosmic Noon

Author(s): Mason, CA; Treu, T; Fontana, A; Jones, T; Morishita, T; Amorin, R; Bradac, M; Finney, EQ; Grillo, C; Henry, A; Hoag, A; Huang, KH; Schmidt, KB; Trenti, M; Vulcani, B | Abstract:

DES meets Gaia: discovery of strongly lensed quasars from a multiplet search

We report the discovery, spectroscopic confirmation, and first lens models of the first, strongly lensed quasars from a combined search in WISE and Gaia-DR1 over the DES footprint. Their Einstein radii span a range between ≈2.0 arcsec and ≈0.4 arcsec. Two of these (WGD2038-4008, RA = 20:38:02.65, Dec.=-40:08:14.64; WGD2021-4115, RA = 20:21:39.45, Dec. = -41:15:57.11) also have confirmed deflector redshifts. The four-image lens WGD2038-4008, with source and deflector redshifts s = 0.777 ± 0.001 and zl = 0.230 ± 0.002, respectively, has a deflector with radius Reff ≈ 3.4 arcsec, stellar mass log(M*/M⊙) = 11.64+0.20 -0.43, and extended isophotal shape variation. Simple lens models yield Einstein radii RE = (1.30 ± 0.04) arcsec, axis ratio q = 0.75 ± 0.1 (compatible with that of the starlight) and considerable shear-ellipticity degeneracies. The two-image lens WGD2021-4115 has zs = 1.390 ± 0.001 and zl = 0.335 ± 0.002, and Einstein radius RE = (1.1 ± 0.1) arcsec, but higher-resolution imaging is needed to accurately separate the deflector and faint quasar image. Analogous lens model degeneracies hold for the other six lenses (J0146-1133, J0150-4041, J0235-2433, J0245-0556, J0259-2338, and J0508-2748) shown in this paper.

The Grism Lens-Amplified Survey from Space (GLASS). XI. Detection of C IV in Multiple Images of the z = 6.11 Lyα Emitter behind RXC J2248.7-4431

Author(s): Schmidt, KB; Huang, KH; Treu, T; Hoag, A; Bradac, M; Henry, AL; Jones, TA; Mason, C; Malkan, M; Morishita, T; Pentericci, L; Trenti, M; Vulcani, B; Wang, X | Abstract:

DETECTION OF LYMAN-ALPHA EMISSION FROM A TRIPLY IMAGEDz= 6.85 GALAXY BEHIND MACS J2129.4−0741

We report the detection of Ly

Dark Matter under the Microscope: Constraining Compact Dark Matter with Caustic Crossing Events

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Models of the strongly lensed quasar DES J0408-5354

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A free-form lensing model of A370 revealing stellar mass dominated BCGs, in Hubble Frontier Fields images

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H0LiCOW VII: cosmic evolution of the correlation between black hole mass and host galaxy luminosity

\AA{} in the Keck/DEIMOS and \HST WFC3 G102 grism data from a triply-imaged galaxy at