6 results on '"S. E. Meidt"'
Search Results
2. Investigating the link between inner gravitational potential and star-formation quenching in CALIFA galaxies
- Author
-
V. Kalinova, D. Colombo, S. F. Sánchez, E. Rosolowsky, K. Kodaira, R. García-Benito, S. E. Meidt, T. A. Davis, A. B. Romeo, S.-Y. Yu, R. González Delgado, E. A. D. Lacerda, Ministerio de Ciencia e Innovación (España), European Commission, and Natural Sciences and Engineering Research Council of Canada
- Subjects
Galaxies: fundamental parameters ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,bulges [galaxies] ,FOS: Physical sciences ,MASS ,SEQUENCE ,DISK ,Galaxies: structure ,kinematics and dynamics [galaxies] ,fundamental parameters [galaxies] ,BLACK-HOLES ,evolution [galaxies] ,SPIRAL STRUCTURE ,Galaxies: bulges ,SPECTROSCOPY ,Galaxies: star formation ,Galaxies: kinematics and dynamics ,Galaxies: evolution ,Astronomy and Astrophysics ,ATLAS(3D) PROJECT ,Astrophysics - Astrophysics of Galaxies ,EVOLUTION ,Physics and Astronomy ,Space and Planetary Science ,GAS ,Astrophysics of Galaxies (astro-ph.GA) ,structure [galaxies] ,star formation [galaxies] ,CLUSTERS ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited., It has been suggested that gravitational potential can have a significant role in suppressing star formation in nearby galaxies. To establish observational constraints on this scenario, we investigated the connection between the dynamics – taking the circular velocity curves (CVCs) as a proxy for the inner gravitational potential – and star formation quenching in 215 non-active galaxies across the Hubble sequence from the Calar Alto Legacy Integral Field Area (CALIFA) survey. Our results show that galaxies with similar CVCs tend to have a certain star-formation quenching pattern. To explore these findings in more details, we constructed kiloparsec(kpc)-resolved relations of the equivalent width of the Hα (WHα) versus the amplitude (Vc) and shape (β = dlnVc/dlnR) of the circular velocity at given radii. We find that the WHα − Vc is a declining relationship, where the retired regions of the galaxies (the ones with WHα values of below 3 Å) tend to have higher Vc. Concurrently, WHα − β is a bimodal relationship, which is characterised by two peaks: concentration of the star forming regions at a positive β (rising CVC) and a second concentration of the retired regions with a negative β (declining CVC). Our results show that both the amplitude of the CVC – driven by the mass of the galaxies – and its shape – which reflects the internal structure of the galaxies – play an important role in the quenching history of a galaxy. © V. Kalinova et al. 2022., DC acknowledges support by the Deutsche Forschungsgemeinschaft, DFG project number SFB956A. SFS acknowledges Conacyt projects CB-285080 and FC-2016-01 -1916, and PAPIIT-DGAPA IN100519. RGB and RGD acknowledge financial support from the State Agency for Research of the Spanish MCIU through the “Center of Excellence Severo Ochoa” award to the Instituto de Astrofísica de Andalucía (SEV-2017-0709), and the projects AYA2016-77846-P and PID2019-109067-GB100. ER acknowledges the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), funding reference number RGPIN-2017-03987. KK acknowledges deep gratitude to MPIfR in Bonn for the Guest Researchership 2013–2021. In this study, we made use of the data of the first legacy survey, the Calar Alto Legacy Integral Field Area (CALIFA) survey, based on observations made at the Centro Astronómico Hispano Alemán (CAHA) at Calar Alto, operated jointly by the Max Planck-Institut für Astronomie and the Instituto de Astrofísica de Andalucía (CSIC). This research made use of the open-source python packages as Astropy (Astropy Collaboration 2018), SciPy (Virtanen et al. 2020), NumPy (Harris et al. 2020), and Matplotlib (Hunter 2007).
- Published
- 2022
3. CALIFA, the Calar Alto Legacy Integral Field Area survey III. Second public data release
- Author
-
R. García-Benito, S. Zibetti, S. F. Sánchez, B. Husemann, A. L. de Amorim, A. Castillo-Morales, R. Cid Fernandes, S. C. Ellis, J. Falcón-Barroso, L. Galbany, A. Gil de Paz, R. M. González Delgado, E. A. D. Lacerda, R. López-Fernandez, A. de Lorenzo-Cáceres, M. Lyubenova, R. A. Marino, D. Mast, M. A. Mendoza, E. Pérez, N. Vale Asari, J. A. L. Aguerri, Y. Ascasibar, S. Bekerait*error*ė, J. Bland-Hawthorn, J. K. Barrera-Ballesteros, D. J. Bomans, M. Cano-Díaz, C. Catalán-Torrecilla, C. Cortijo, G. Delgado-Inglada, M. Demleitner, R.-J. Dettmar, A. I. Díaz, E. Florido, A. Gallazzi, B. García-Lorenzo, J. M. Gomes, L. Holmes, J. Iglesias-Páramo, K. Jahnke, V. Kalinova, C. Kehrig, R. C. Kennicutt, Á. R. López-Sánchez, I. Márquez, J. Masegosa, S. E. Meidt, J. Mendez-Abreu, M. Mollá, A. Monreal-Ibero, C. Morisset, A. del Olmo, P. Papaderos, I. Pérez, A. Quirrenbach, F. F. Rosales-Ortega, M. M. Roth, T. Ruiz-Lara, P. Sánchez-Blázquez, L. Sánchez-Menguiano, R. Singh, K. Spekkens, V. Stanishev, J. P. Torres-Papaqui, G. van de Ven, J. M. Vilchez, C. J. Walcher, V. Wild, L. Wisotzki, B. Ziegler, J. Alves, D. Barrado, J. M. Quintana, J. Aceituno, Fundação para a Ciência e a Tecnologia (Portugal), Ministerio de Economía y Competitividad (España), European Commission, Ministerio de Ciencia e Innovación (España), European Research Council, University of St Andrews. School of Physics and Astronomy, University of St Andrews. Spanish, University of St Andrews. Applied Mathematics, University of St Andrews. School of International Relations, University of St Andrews. The Handa Centre for the Study of Terrorism and Political Violence, and Astronomy
- Subjects
Galaxies: general ,Astrofísica ,POTSDAM MULTIAPERTURE SPECTROPHOTOMETER ,PPAK ,MASS-METALLICITY RELATION ,GALAXY SURVEY ,FOS: Physical sciences ,Techniques: spectroscopic ,Astrophysics ,I ,Surveys ,01 natural sciences ,law.invention ,spectroscopic [Techniques] ,Telescope ,law ,Observatory ,0103 physical sciences ,Calibration ,QB Astronomy ,Spectral resolution ,010303 astronomy & astrophysics ,Spectrograph ,Image resolution ,QC ,QB ,Physics ,SPECTROSCOPY ,010308 nuclear & particles physics ,4. Education ,Astronomy ,Astronomy and Astrophysics ,DAS ,general [Galaxies] ,Astrophysics - Astrophysics of Galaxies ,Galaxy ,Redshift ,GALAXIES ,Astronomía ,QC Physics ,Physics and Astronomy ,Space and Planetary Science ,STELLAR POPULATION SYNTHESIS ,Astrophysics of Galaxies (astro-ph.GA) ,DIGITAL SKY SURVEY ,SPIRAL ,EMISSION - Abstract
CALIFA is the first legacy survey being performed at Calar Alto. The CALIFA collaboration would like to thank the IAA-CSIC and MPIA-MPG as major partners of the observatory, and CAHA itself, for the unique access to telescope time and support in manpower and infrastructures. The CALIFA collaboration thanks also the CAHA staff for the dedication to this project. R.G.B., R.G.D., and E.P. are supported by the Spanish Ministerio de Ciencia e Innovacion under grant AYA2010-15081. S.Z. is supported by the EU Marie Curie Integration Grant "SteMaGE" Nr. PCIG12-GA-2012-326466 (Call Identifier: FP7-PEOPLE-2012 CIG). J.F.B. acknowledges support from grants AYA2010-21322-C03-02 and AIB-2010-DE-00227 from the Spanish Ministry of Economy and Competitiveness (MINECO), as well as from the FP7 Marie Curie Actions of the European Commission, via the Initial Training Network DAGAL under REA grant agreement number 289313. Support for L.G. is provided by the Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant IC12009, awarded to The Millennium Institute of Astrophysics, M.A.S.L.G. also acknowledges support by CONICYT through FONDECYT grant 3140566. A.G. acknowledges support from the FP7/2007-2013 under grant agreement n. 267251 (AstroFIt). J.M.G. acknowledges support from the Fundacao para a Ciencia e a Tecnologia (FCT) through the Fellowship SFRH/BPD/66958/2009 from FCT (Portugal) and research grant PTDC/FIS-AST/3214/2012. RAM was funded by the Spanish programme of International Campus of Excellence Moncloa (CEI). J.M.A. acknowledges support from the European Research Council Starting Grant (SEDmorph; P.I. V. Wild). I.M., J.M. and A.d.O. acknowledge the support by the projects AYA2010-15196 from the Spanish Ministerio de Ciencia e Innovacion and TIC 114 and PO08-TIC-3531 from Junta de Andalucia. AMI acknowledges support from Agence Nationale de la Recherche through the STILISM project (ANR-12-BS05-0016-02). M.M. acknowledges financial support from AYA2010-21887-C04-02 from the Ministerio de Economia y Competitividad. P.P. is supported by an FCT Investigador 2013 Contract, funded by FCT/MCTES (Portugal) and POPH/FSE (EC). P.P. acknowledges support by FCT under project FCOMP-01-0124-FEDER-029170 (Reference FCT PTDC/FIS-AST/3214/2012), funded by FCT-MEC (PIDDAC) and FEDER (COMPETE). T.R.L. thanks the support of the Spanish Ministerio de Educacion, Cultura y Deporte by means of the FPU fellowship. PSB acknowledges support from the Ramon y Cajal program, grant ATA2010-21322-C03-02 from the Spanish Ministry of Economy and Competitiveness (MINECO). C.J.W. acknowledges support through the Marie Curie Career Integration Grant 303912. V.W. acknowledges support from the European Research Council Starting Grant (SEDMorph P.I. V. Wild) and European Career Re-integration Grant (Phiz-Ev P.I.V. Wild). Y.A. acknowledges financial support from the Ramon y Cajal programme (RyC-2011-09461) and project AYA2013-47742-C4-3-P, both managed by the Ministerio de Economia y Competitividad, as well as the "Study of Emission-Line Galaxies with Integral-Field Spectroscopy" (SELGIFS) programme, funded by the EU (FP7-PEOPLE-2013-IRSES-612701) within the Marie-Sklodowska-Curie Actions scheme. We thank the referee David Wilman for very useful comments that improved the presentation of the paper., This paper describes the Second Public Data Release (DR2) of the Calar Alto Legacy Integral Field Area (CALIFA) survey. The data for 200 objects are made public, including the 100 galaxies of the First Public Data Release (DR1). Data were obtained with the integral-field spectrograph PMAS/PPak mounted on the 3.5 m telescope at the Calar Alto observatory. Two different spectral setups are available for each galaxy, (i) a lowresolution V500 setup covering the wavelength range 3745–7500 Å with a spectral resolution of 6.0 Å (FWHM); and (ii) a medium-resolution V1200 setup covering the wavelength range 3650–4840 Å with a spectral resolution of 2.3 Å (FWHM). The sample covers a redshift range between 0.005 and 0.03, with a wide range of properties in the color–magnitude diagram, stellar mass, ionization conditions, and morphological types. All the cubes in the data release were reduced with the latest pipeline, which includes improved spectrophotometric calibration, spatial registration, and spatial resolution. The spectrophotometric calibration is better than 6% and the median spatial resolution is 200 : 4. In total, the second data release contains over 1.5 million spectra., Instituto de Salud Carlos III Spanish Government AYA2010-15081 AYA2010-15196, European Union (EU) PCIG12-GA-2012-326466, Spanish Ministry of Economy and Competitiveness (MINECO) AYA2010-21322-C03-02 AIB-2010-DE-00227, FP7 Marie Curie Actions of the European Commission, via the Initial Training Network DAGAL under REA 289313, Ministry of Economy, Development, and Tourism's Millennium Science Initiative IC12009, Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 3140566, Fundacao para a Ciencia e a Tecnologia (FCT) from FCT (Portugal) SFRH/BPD/66958/2009, Spanish programme of International Campus of Excellence Moncloa (CEI), European Research Council (ERC), Junta de Andalucia TIC 114 PO08-TIC-3531, French National Research Agency (ANR) ANR-12-BS05-0016-02, Spanish Government AYA2010-21887-C04-02, FCT Investigador Contract - FCT/MCTES (Portugal), European Commission Joint Research Centre European Social Fund (ESF), FCT - FCT-MEC (PIDDAC) FCOMP-01-0124-FEDER-029170 FCT PTDC/FIS-AST/3214/2012, European Union (EU), Spanish Ministerio de Educacion, Cultura y Deporte by FPU, Ramon y Cajal program from the Spanish Ministry of Economy and Competitiveness (MINECO) ATA2010-21322-C03-02, European Union (EU) 303912, European Career Re-integration Grant, Spanish Government RyC-2011-09461 AYA2013-47742-C4-3-P, European Union (EU) FP7-PEOPLE-2013-IRSES-612701, PTDC/FIS-AST/3214/2012, Science & Technology Facilities Council (STFC) ST/K000985/1
- Published
- 2015
4. Enhanced dust heating in the bulges of early-type spiral galaxies
- Author
-
C. W. Engelbracht, L. K. Hunt, R. A. Skibba, J. L. Hinz, D. Calzetti, K. D. Gordon, H. Roussel, A. F. Crocker, K. A. Misselt, A. D. Bolatto, R. C. Kennicutt, P. N. Appleton, L. Armus, P. Beirão, B. R. Brandl, K. V. Croxall, D. A. Dale, B. T. Draine, G. Dumas, A. Gil de Paz, B. Groves, C.-N. Hao, B. D. Johnson, J. Koda, O. Krause, A. K. Leroy, S. E. Meidt, E. J. Murphy, N. Rahman, H.-W. Rix, K. M. Sandstrom, M. Sauvage, E. Schinnerer, J.-D. T. Smith, S. Srinivasan, L. Vigroux, F. Walter, B. E. Warren, C. D. Wilson, M. G. Wolfire, and S. Zibetti
- Subjects
Astrofísica ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,INFRARED-EMISSION ,MU-M ,galaxies [submillimeter] ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,galaxies [infrared] ,STAR-FORMATION ,Bulge ,Astrophysics::Solar and Stellar Astrophysics ,NEARBY GALAXIES ,COLD DUST ,Stellar density ,Astrophysics::Galaxy Astrophysics ,Physics ,Spiral galaxy ,ISM [galaxies] ,extinction ,Astronomy and Astrophysics ,DISK GALAXIES ,Galaxy ,Early type ,Astronomía ,Temperature gradient ,Wavelength ,SPITZER ,SPECTRAL ENERGY-DISTRIBUTION ,Physics and Astronomy ,Space and Planetary Science ,MULTIBAND IMAGING PHOTOMETER ,dust ,Astrophysics::Earth and Planetary Astrophysics ,ABSOLUTE CALIBRATION ,Bar (unit) ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Stellar density and bar strength should affect the temperatures of the cool (T ~ 20-30 K) dust component in the inner regions of galaxies, which implies that the ratio of temperatures in the circumnuclear regions to the disk should depend on Hubble type. We investigate the differences between cool dust temperatures in the central 3 kpc and disk of 13 nearby galaxies by fitting models to measurements between 70 and 500 microns. We attempt to quantify temperature trends in nearby disk galaxies, with archival data from Spitzer/MIPS and new observations with Herschel/SPIRE, which were acquired during the first phases of the Herschel observations for the KINGFISH (key insights in nearby galaxies: a far-infrared survey with Herschel) sample. We fit single-temperature modified blackbodies to far-infrared and submillimeter measurements of the central and disk regions of galaxies to determine the temperature of the component(s) emitting at those wavelengths. We present the ratio of central-region-to-disk-temperatures of the cool dust component of 13 nearby galaxies as a function of morphological type. We find a significant temperature gradient in the cool dust component in all galaxies, with a mean center-to-disk temperature ratio of 1.15 +/- 0.03. The cool dust temperatures in the central ~3 kpc of nearby galaxies are 23(+/-3)% hotter for morphological types earlier than Sc, and only 9(+/-3)% hotter for later types. The temperature ratio is also correlated with bar strength, with only strongly barred galaxies having a ratio over 1.2. The strong radiation field in the high stellar density of a galactic bulge tends to heat the cool dust component to higher temperatures, at least in early-type spirals with relatively large bulges, especially when paired with a strong bar., Comment: Accepted for publication on the A&A Herschel Special Issue
- Published
- 2010
5. PATTERN SPEEDS OF SPIRAL GALAXIES USING THE TREMAINE-WEINBERG METHOD
- Author
-
R. J. Rand and S. E. Meidt
- Subjects
Physics ,Luminous infrared galaxy ,Barred spiral galaxy ,Spiral galaxy ,Bulge ,Radio galaxy ,Elliptical galaxy ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Interacting galaxy ,Lenticular galaxy ,Astrophysics::Galaxy Astrophysics - Abstract
Long-lasting spiral structure in galaxies is established when density waves form a pattern that rotates at a constant angular frequency Ωp, the pattern speed. This quantity, critical to understanding spiral structure, galaxy evolution, and the connection, if any, between bars and spirals in galaxies, is not directly measurable. Most determinations of pattern speeds have relied on identifying morphological features at certain radii as resonances, but this depends significantly on knowledge of the behavior of stars and gas at these resonances. The Tremaine-Weinberg (TW) method allows for the determination of pattern speeds based on kinematic observations in a way completely independent of resonance identification, or theories of spiral structure, relying on the identification of a tracer that obeys the continuity equation as it orbits through the pattern. This work expands on previous studies of the TW method applied to galaxies with molecularor HI-dominated ISMs. In galaxies where the ISM is found to be dominated by one phase, it is assumed that this component satisfies the continuity requirement; for galaxies with H2 dominated ISMs, for instance, the TW method has successfully been applied using CO(1-0) emission as a tracer for the molecular gas surface density (Rand & Wallin 2004).
- Published
- 2007
- Full Text
- View/download PDF
6. Mapping Metallicity Variations across Nearby Galaxy Disks.
- Author
-
K. Kreckel, I.-T. Ho, G. A. Blanc, B. Groves, F. Santoro, E. Schinnerer, F. Bigiel, M. Chevance, E. Congiu, E. Emsellem, C. Faesi, S. C. O. Glover, K. Grasha, J. M. D. Kruijssen, P. Lang, A. K. Leroy, S. E. Meidt, R. McElroy, J. Pety, and E. Rosolowsky
- Subjects
DISK galaxies ,INTEGRAL field spectroscopy ,VERY large telescopes ,SPIRAL galaxies ,STAR clusters ,MOLECULAR clouds ,INTERSTELLAR medium - Abstract
The distribution of metals within a galaxy traces the baryon cycle and the buildup of galactic disks, but the detailed gas phase metallicity distribution remains poorly sampled. We have determined the gas phase oxygen abundances for 7138 H ii regions across the disks of eight nearby galaxies using Very Large Telescope/Multi Unit Spectroscopic Explorer (MUSE) optical integral field spectroscopy as part of the PHANGS–MUSE survey. After removing the first-order radial gradients present in each galaxy, we look at the statistics of the metallicity offset (ΔO/H) and explore azimuthal variations. Across each galaxy, we find low (σ = 0.03–0.05 dex) scatter at any given radius, indicative of efficient mixing. We compare physical parameters for those H ii regions that are 1σ outliers toward both enhanced and reduced abundances. Regions with enhanced abundances have high ionization parameter, higher Hα luminosity, lower Hα velocity dispersion, younger star clusters, and associated molecular gas clouds showing higher molecular gas densities. This indicates recent star formation has locally enriched the material. Regions with reduced abundances show increased Hα velocity dispersions, suggestive of mixing introducing more pristine material. We observe subtle azimuthal variations in half of the sample, but cannot always cleanly associate this with the spiral pattern. Regions with enhanced and reduced abundances are found distributed throughout the disk, and in half of our galaxies we can identify subsections of spiral arms with clearly associated metallicity gradients. This suggests spiral arms play a role in organizing and mixing the interstellar medium. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.