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We study the evolution of the star formation rate (SFR) - stellar mass (M_star) relation and specific star formation rate (sSFR) of star forming galaxies (SFGs) since a redshift z~5.5 using 2435 (4531) galaxies with highly reliable…

We study the connection between the observed star formation rate-stellar mass (SFR-$M_*$) relation and the evolution of the stellar mass function (SMF) by means of a subhalo abundance matching technique coupled to merger trees extracted…

星系天体物理 · 物理学 2017-11-15 E. Contini , X. Kang , A. D. Romeo , Q. Xia , S. K. Yi

We present a study of the evolution of the galaxy Velocity Dispersion Function (VDF) from z=0 to z=1.5 using photometric data from the UKIDSS Ultra Deep Survey (UDS) and Newfirm Medium Band Survey (NMBS) COSMOS surveys. The VDF has been…

We derive stellar masses from SED fitting to rest-frame optical and UV fluxes for 401 star-forming galaxies at z 4, 5, and 6 from Hubble-WFC3/IR observations of the ERS combined with the deep GOODS-S Spitzer/IRAC data (and include a…

宇宙学与河外天体物理 · 物理学 2015-05-19 Valentino Gonzalez , Ivo Labbe , Rychard Bouwens , Garth Illingworth , Marijn Franx , Mariska Kriek

Strong lensing systems, expected to be abundantly discovered by next-generation surveys, offer a powerful tool for studying cosmology and galaxy evolution. The connection between galaxy structure and cosmology through distance ratios…

宇宙学与河外天体物理 · 物理学 2025-02-19 Shuaibo Geng , Margherita Grespan , Hareesh Thuruthipilly , Sreekanth Harikumar , Agnieszka Pollo , Marek Biesiada

We study the evolution in the number density of the highest mass galaxies over $0.4<z<1.5$ (covering 9 Gyr). We use the Spitzer/HETDEX Exploratory Large-Area (SHELA) Survey, which covers 17.5 $\mathrm{deg}^2$ with eight photometric bands…

The star formation rate - stellar mass relation (SFR-M*) and its evolution (i.e., the SFR main sequence) describes the growth rate of galaxies of a given stellar mass and at a given redshift. Assuming that present-day star-forming galaxies…

宇宙学与河外天体物理 · 物理学 2012-01-17 Samuel N. Leitner

The physical processes driving the evolution of star formation (SF) in galaxies over cosmic time still present many open questions. Recent galaxy surveys allow now to study these processes in great detail at intermediate redshift. In this…

Utilising optical and near-infrared broadband photometry covering $> 5\,{\rm deg}^2$ in two of the most well-studied extragalactic legacy fields (COSMOS and XMM-LSS), we measure the galaxy stellar mass function (GSMF) between $0.1 < z <…

星系天体物理 · 物理学 2021-08-18 N. J. Adams , R. A. A. Bowler , M. J. Jarvis , B. Haußler , C. D. P. Lagos

We investigate the resolved star formation properties of a sample of 45 massive galaxies (M_*>10^11M_solar) within a redshift range of 1.5 < z < 3 detected in the GOODS NICMOS Survey (Conselice et al. 2011), a HST H-band imaging program. We…

宇宙学与河外天体物理 · 物理学 2012-12-17 Jamie R. Ownsworth , Christopher J. Conselice , Alice Mortlock , William G. Hartley , Fernando Buitrago

We use very deep near-infrared (NIR) imaging data obtained in MOIRCS Deep Survey (MODS) to investigate the evolution of the galaxy stellar mass function back to z~3. The MODS data reach J=24.2, H=23.1, K=23.1 (5sigma, Vega magnitude) over…

宇宙学与河外天体物理 · 物理学 2009-09-28 M. Kajisawa , T. Ichikawa , I. Tanaka , M. Konishi , T. Yamada , M. Akiyama , R. Suzuki , C. Tokoku , Y. K. Uchimoto , T. Yoshikawa , M. Ouchi , I. Iwata , T. Hamana , M. Onodera

The chemical composition of the gas in galaxies versus cosmic time provides a very important tool for understanding galaxy evolution. Although there are many studies at high redshift, they are rather scarce at lower redshifts. However, low…

宇宙学与河外天体物理 · 物理学 2011-03-28 M. A. Lara-Lopez , J. Cepa , A. Bongiovanni , A. M. Perez Garcia , H. Castaneda , M. Fernandez Lorenzo , M. Povic , M. Sanchez-Portal

Aims. We focus on how to homogenize the comparison between galaxy samples having different characteristics. We check the projections of the fundamental metallicity relation (FMR) and the evolution of these projections between a sample…

星系天体物理 · 物理学 2022-07-27 F. Pistis , A. Pollo , M. Scodeggio , M. Figueira , A. Durkalec , K. Małek , A. Iovino , D. Vergani , S. Salim

Numerous high-$z$ galaxies have recently been observed with JWST, providing new insights into early galaxy evolution. Their physical properties are typically derived through spectral energy distribution (SED) fitting, but the reliability of…

星系天体物理 · 物理学 2026-02-25 Jiyoung Choe , Taysun Kimm , Harley Katz , Maxime Rey , Daniel Han , J. K. Jang , Joki Rosdahl

We present the statistics of line ratios and direct Te-based metallicities from JWST medium-resolution spectra of 292 galaxies at z=2-10, combining DREAMS observations with those of JADES and CEERS. To remove systematics caused by stellar…

We examine the impact of using photometric redshifts for studying the evolution of both the global galaxy luminosity function (LF) and that for different galaxy types. To this end we compare LFs obtained using photometric redshifts from the…

宇宙学与河外天体物理 · 物理学 2015-05-28 B. H. F. Ramos , P. S. Pellegrini , C. Benoist , L. N. da Costa , M. A. G. Maia , M. Makler , R. L. C. Ogando , F. de Simoni , A. A. Mesquita

We measure the evolution of the specific star formation rate (sSFR = SFR / Mstellar) between redshift 4 and 6 to investigate the previous reports of "constant" sSFR at z>2. We obtain photometry on a large sample of galaxies at z~4-6 located…

宇宙学与河外天体物理 · 物理学 2015-06-11 Valentino Gonzalez , Rychard Bouwens , Garth llingworth , Ivo Labbe , Pascal Oesch , Marijn Franx , Dan Magee

The Hubble Frontier Fields represent the opportunity to probe the high-redshift evolution of the main sequence of star-forming galaxies to lower masses than possible in blank fields thanks to foreground lensing of massive galaxy clusters.…

星系天体物理 · 物理学 2022-08-17 L. Sandles , E. Curtis-Lake , S. Charlot , J. Chevallard , R. Maiolino

Utilizing spectroscopic observations taken for the VIMOS Ultra-Deep Survey (VUDS), new observations from Keck/DEIMOS, and publicly available observations of large samples of star-forming galaxies, we report here on the relationship between…