Bulges and disks in the nearby universe: Applications to evolution and formation of galaxies / Meert, Alan.

Format:

Book

Thesis/Dissertation

Author/Creator:

Meert, Alan, author.

Contributor:

Bernardi, Mariangela, degree supervisor.

Thomson, Evelyn, degree committee member.

Sheth, R. K. (Ravi K.), degree committee member.

Sako, Masao, degree committee member.

Lidz, Adam, degree committee member.

University of Pennsylvania. Physics and Astronomy, degree granting institution.

Language:

English

Subjects (All):

Astrophysics.

Astronomy.

Physics and Astronomy--Penn dissertations.

Penn dissertations--Physics and Astronomy.

Local Subjects:

Astrophysics.

Astronomy.

Physics and Astronomy--Penn dissertations.

Penn dissertations--Physics and Astronomy.

Genre:

Academic theses.

Physical Description:

1 online resource (337 pages)

Contained In:

Dissertation Abstracts International 76-11B(E).

Place of Publication:

[Philadelphia, Pennsylvania]: University of Pennsylvania ; Ann Arbor : ProQuest Dissertations & Theses, 2015.

Language Note:

English

System Details:

Mode of access: World Wide Web.

text file

Summary:

We present a catalog of 2D, PSF-corrected de Vacouleurs, Sersic, de Vacouleurs + Exponential, and Sersic + Exponential fits of ∼7 x 105 spectroscopically selected galaxies drawn from the Sloan Digital Sky Survey (SDSS) Data Release 7. Fits are performed for the SDSS r-band utilizing the fitting routine GALFIT and analysis pipeline PYMORPH . Simulations are used to test the two-dimensional decompositions of SDSS galaxies. We compare these fits to prior catalogs and present a physically motivated flagging system which suggests that more than 90 per cent of two-component fits can be used for analysis. The catalogs provide a robust set of structural and photometric parameters for future galaxy studies. The catalog is then extended into the g-band and i-band. The data and fitted images are available online at http://shalaowai.physics.upenn.edu/∼ameert/fit_catalog/ .

Two applications of the catalog are presented. The sensitivity to the choice of light profile and its affect on the massive end of the stellar mass function is quantified. The total stellar mass density at z ∼ 0.1 is about 1.2 times larger than in previous analysis of the SDSS using the new catalog. The differences are most pronounced at the massive end, where the measured number density of objects having M* greater than or equal to 6 x 1011 M[special character omitted] is approximately five times larger. The systematics of fitting different model profiles on the size-luminosity relation of galaxies in the SDSS (i.e. at z ∼ 0.1) are also quantified in the r-band. The net effect on the R-L relation is small, except for the most luminous tail. Neither the early- nor the late-type relations are pure power laws: both show significant curvature, which we quantify. This curvature confirms that two mass scales are special for both early- and late-type galaxies: M* ∼ 3 x 10 10 and 2 x 1011 M[special character omitted] . The intrinsic scatter in the R-L relation is shown to decrease at large L and/or M* and should provide additional constraints on models of how the most massive galaxies formed.

Future work applying the analysis to DES and LSST galaxies at higher redshifts is suggested to further constrain models of galaxy formation and evolution at higher redshifts.

Notes:

Source: Dissertation Abstracts International, Volume: 76-11(E), Section: B.

Includes supplementary digital materials.

Advisors: Mariangela Bernardi; Committee members: Adam Lidz; Masao Sako; Ravi Sheth; Evelyn Thomson.

Department: Physics and Astronomy.

Ph.D. University of Pennsylvania 2015.

Local Notes:

School code: 0175

ISBN:

9781321851465

Access Restriction:

Restricted for use by site license.