Nebular Continuum and Line Emission in Stellar Population Synthesis Models

被引：343

作者：

Byler, Nell ^{[1
]}

Dalcanton, Julianne J. ^{[1
]}

Conroy, Charlie ^{[2
]}

Johnson, Benjamin D. ^{[2
]}

机构：

[1] Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA

[2] Harvard Univ, Dept Astron, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 840卷 / 01期

关键词：

galaxies: abundances; galaxies: ISM; galaxies: star formation; STAR-FORMING GALAXIES; DIGITAL SKY SURVEY; INITIAL MASS FUNCTION; ACTIVE GALACTIC NUCLEI; H II REGIONS; EVOLUTIONARY SYNTHESIS; PHYSICAL-PROPERTIES; METALLICITY RELATION; STARBURST GALAXIES; IONIZING SPECTRA;

D O I：

10.3847/1538-4357/aa6c66

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Accounting for nebular emission when modeling galaxy spectral energy distributions (SEDs) is important, as both line and continuum emissions can contribute significantly to the total observed flux. In this work, we present a new nebular emission model integrated within the Flexible Stellar Population Synthesis code that computes the line and continuum emission for complex stellar populations using the photoionization code CLOUDY. The self-consistent coupling of the nebular emission to the matched ionizing spectrum produces emission line intensities that correctly scale with the stellar population as a function of age and metallicity. This more complete model of galaxy SEDs will improve estimates of global gas properties derived with diagnostic diagrams, star formation rates based on Ha, and physical properties derived from broadband photometry. Our models agree well with results from other photoionization models and are able to reproduce observed emission from H II regions and star-forming galaxies. Our models show improved agreement with the observed H II regions in the Ne III/O II plane and show satisfactory agreement with He II emission from z = 2 galaxies, when including rotating stellar models. Models including post-asymptotic giant branch stars are able to reproduce line ratios consistent with low-ionization emission regions. The models are integrated into current versions of FSPS and include self-consistent nebular emission predictions for MIST and Padova+Geneva evolutionary tracks.

引用

页数：27

共 76 条

[1] THE SEVENTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY [J].

Abazajian, Kevork N. ;

Adelman-McCarthy, Jennifer K. ;

Agueros, Marcel A. ;

Allam, Sahar S. ;

Prieto, Carlos Allende ;

An, Deokkeun ;

Anderson, Kurt S. J. ;

Anderson, Scott F. ;

Annis, James ;

Bahcall, Neta A. ;

Bailer-Jones, C. A. L. ;

Barentine, J. C. ;

Bassett, Bruce A. ;

Becker, Andrew C. ;

Beers, Timothy C. ;

Bell, Eric F. ;

Belokurov, Vasily ;

Berlind, Andreas A. ;

Berman, Eileen F. ;

Bernardi, Mariangela ;

Bickerton, Steven J. ;

Bizyaev, Dmitry ;

Blakeslee, John P. ;

Blanton, Michael R. ;

Bochanski, John J. ;

Boroski, William N. ;

Brewington, Howard J. ;

Brinchmann, Jarle ;

Brinkmann, J. ;

Brunner, Robert J. ;

Budavari, Tamas ;

Carey, Larry N. ;

Carliles, Samuel ;

Carr, Michael A. ;

Castander, Francisco J. ;

Cinabro, David ;

Connolly, A. J. ;

Csabai, Istvan ;

Cunha, Carlos E. ;

Czarapata, Paul C. ;

Davenport, James R. A. ;

de Haas, Ernst ;

Dilday, Ben ;

Doi, Mamoru ;

Eisenstein, Daniel J. ;

Evans, Michael L. ;

Evans, N. W. ;

Fan, Xiaohui ;

Friedman, Scott D. ;

Frieman, Joshua A. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2009, 182 (02) :543-558

[2] ABUNDANCES OF THE ELEMENTS - METEORITIC AND SOLAR [J].

ANDERS, E ;

GREVESSE, N .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1989, 53 (01) :197-214

[3] Spectral and photometric evolution of young stellar populations: The impact of gaseous emission at various metallicities [J].

Anders, P ;

von Alvensleben, UF .

ASTRONOMY & ASTROPHYSICS, 2003, 401 (03) :1063-1070

[4] CLASSIFICATION PARAMETERS FOR THE EMISSION-LINE SPECTRA OF EXTRA-GALACTIC OBJECTS [J].

BALDWIN, JA ;

PHILLIPS, MM .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1981, 93 (551) :5-19

[5] SDSS IV MaNGA - spatially resolved diagnostic diagrams: a proof that many galaxies are LIERs [J].

Belfiore, Francesco ;

Maiolino, Roberto ;

Maraston, Claudia ;

Emsellem, Eric ;

Bershady, Matthew A. ;

Masters, Karen L. ;

Yan, Renbin ;

Bizyaev, Dmitry ;

Boquien, Mederic ;

Brownstein, Joel R. ;

Bundy, Kevin ;

Drory, Niv ;

Heckman, Timothy M. ;

Law, David R. ;

Roman-Lopes, Alexandre ;

Pan, Kaike ;

Stanghellini, Letizia ;

Thomas, Daniel ;

Weijmans, Anne-Marie ;

Westfall, Kyle B. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2016, 461 (03) :3111-3134

[6]

BERTELLI G, 1994, ASTRON ASTROPHYS SUP, V106, P275

[7]

BINETTE L, 1994, ASTRON ASTROPHYS, V292, P13

[8] parsec: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code [J].

Bressan, Alessandro ;

Marigo, Paola ;

Girardi, Leo ;

Salasnich, Bernardo ;

Dal Cero, Claudia ;

Rubele, Stefano ;

Nanni, Ambra .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 427 (01) :127-145

[9] The physical properties of star-forming galaxies in the low-redshift Universe [J].

Brinchmann, J ;

Charlot, S ;

White, SDM ;

Tremonti, C ;

Kauffmann, G ;

Heckman, T ;

Brinkmann, J .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 351 (04) :1151-1179

[10] The dearth of UV-bright stars in M32: Implications for stellar evolution theory [J].

Brown, Thomas M. ;

Smith, Ed ;

Ferguson, Henry C. ;

Sweigart, Allen V. ;

Kimble, Randy A. ;

Bowers, Charles W. .

ASTROPHYSICAL JOURNAL, 2008, 682 (01) :319-335

← 1 2 3 4 5 6 7 8 →