星系和质量组装（GAMA）：数据发布4和z <0.1总和z <0.08形态学星系恒星质量函数

论文标题

星系和质量组装（GAMA）：数据发布4和z <0.1总和z <0.08形态学星系恒星质量函数

Galaxy And Mass Assembly (GAMA): Data Release 4 and the z < 0.1 total and z < 0.08 morphological galaxy stellar mass functions

论文作者

Driver, Simon P., Bellstedt, Sabine, Robotham, Aaron S. G., Baldry, Ivan K., Davies, Luke J., Liske, Jochen, Obreschkow, Danail, Taylor, Edward N., Wright, Angus H., Alpaslan, Mehmet, Bamford, Steven P., Bauer, Amanda E., Bland-Hawthorn, Joss, Bilicki, Maciej, Bravo, Matias, Brough, Sarah, Casura, Sarah, Cluver, Michelle E., Colless, Matthew, Conselice, Christopher J., Croom, Scott M., de Jong, Jelte, D'Eugenio, Franceso, De Propris, Roberto, Dogruel, Burak, Drinkwater, Michael J., Dvornik, Andrej, Farrow, Daniel J., Frenk, Carlos S., Giblin, Benjamin, Graham, Alister W., Grootes, Meiert W., Gunawardhana, Madusha L. P., Hashemizadeh, Abdolhosein, Haussler, Boris, Heymans, Catherine, Hildebrandt, Hendrik, Holwerda, Benne W., Hopkins, Andrew M., Jarrett, Tom H., Jones, D. Heath, Kelvin, Lee S., Koushan, Soheil, Kuijken, Konrad, Lara-Lopez, Maritza A., Lange, Rebecca, Lopez-Sanchez, Angel R., Loveday, Jon, Mahajan, Smriti, Meyer, Martin, Moffett, Amanda J., Napolitano, Nicola R., Norberg, Peder, Owers, Matt S., Radovich, Mario, Raouf, Mojtaba, Peacock, John A., Phillipps, Steven, Pimbblet, Kevin A., Popescu, Cristina, Said, Khaled, Sansom, Anne E., Seibert, Mark, Sutherland, Will J., Thorne, Jessica E., Tuffs, Richard J., Turner, Ryan, van der Wel, Arjen, van Kampen, Eelco, Wilkins, Steve M.

论文摘要

在Galaxy和Mass Assembly数据版本4（GAMA DR4）中，我们提供了全光谱红移样品。其中包括248682个星系光谱，结合了较早的调查，在覆盖〜250DEG^2的五个天空区域中导致330542红移。红移密度是在这种持续区域中可用的最高可用性，其完整性异常高（r_kids = 19.65毫克95％），非常适合研究星系合并，星系组和低红移（z <0.25）星系人群。 DR4包括32个增值表或数据管理单元（DMU），它们提供了许多测量和衍生的数据产品，包括Galex，Eso Kids，ESO Viking，Wise，Wise和Herschel空间天文台成像。在此版本中，我们为15330个星系提供视觉形态至z <0.08，所有1800万对物体的光度红移估计值〜25mag，以及111830星系的恒星速度分散。最后，我们通过得出总银河恒星质量函数（GSMF）及其按形态学类别（椭圆形，紧凑型和圆盘，散布式和椎间盘以及仅碟片）的细分。这将我们先前对总GSMF的测量扩展到10^6.75 m_sol H^-2_70，我们发现Rho _*=（2.97 +/- 0.04）X10^8 M_SOL H_SOL H_70 MPC^-3或OMEGA _ _*=（2.97 +/-0.04）X10^8 m_sol H_70 mpc^-3或Omega _*=（2.17+/0.03）我们得出的结论是，在z <0.1时，宇宙已将大爆炸核合成所隐含的重度质量转化为4.9 +/- 0.1％，这些质量被重力结合在星系群体内。

In Galaxy And Mass Assembly Data Release 4 (GAMA DR4), we make available our full spectroscopic redshift sample. This includes 248682 galaxy spectra, and, in combination with earlier surveys, results in 330542 redshifts across five sky regions covering ~250deg^2. The redshift density, is the highest available over such a sustained area, has exceptionally high completeness (95 per cent to r_KIDS=19.65mag), and is well suited for the study of galaxy mergers, galaxy groups, and the low redshift (z<0.25) galaxy population. DR4 includes 32 value-added tables or Data Management Units (DMUs) that provide a number of measured and derived data products including GALEX, ESO KiDS, ESO VIKING, WISE and Herschel Space Observatory imaging. Within this release, we provide visual morphologies for 15330 galaxies to z<0.08, photometric redshift estimates for all 18million objects to r_KIDS~25mag, and stellar velocity dispersions for 111830 galaxies. We conclude by deriving the total galaxy stellar mass function (GSMF) and its sub-division by morphological class (elliptical, compact-bulge and disc, diffuse-bulge and disc, and disc only). This extends our previous measurement of the total GSMF down to 10^6.75 M_sol h^-2_70 and we find a total stellar mass density of rho_*=(2.97+/-0.04)x10^8 M_sol h_70 Mpc^-3 or Omega_*=(2.17+/-0.03)x10^-3 h^-1_70. We conclude that at z<0.1, the Universe has converted 4.9+/-0.1 per cent of the baryonic mass implied by Big Bang Nucleosynthesis into stars that are gravitationally bound within the galaxy population.

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