On the Use of Field RR Lyrae as Galactic Probes. V. Optical and Radial Velocity Curve Templates
On the Use of Field RR Lyrae as Galactic Probes. V. Optical and Radial Velocity Curve Templates
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DOI：
10.3847/1538-4357/ac1074
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发表时间：
2021-07
期刊：
影响因子：
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通讯作者：
V. Braga;J. Crestani;M. Fabrizio;G. Bono;G. Preston;C. Sneden;J. Storm;S. Kamann;M. Latour;H. Lala;B. Lemasle;Z. Prudil;G. Altavilla;B. Chaboyer;M. Dall’ora;I. Ferraro;C. Gilligan;G. Fiorentino;G. Iannicola;L. Inno;S. Kwak;M. Marengo;S. Marinoni;P. Marrese;C. Martínez-Vázquez;M. Monelli;J. Mullen;N. Matsunaga;J. Neeley;P. Stetson;E. Valenti;M. T. I. A. D. Roma;M. Catone;Italy.;S. Center;Roma;D. D. Astronomia-D.;Universidade Federal do Rio Grande do Sul-Universidade-Federal-do-Rio-Grande-do-Sul-102904658;P. Alegre;Brazil.;D. Fisica;Universita' di Roma Tor Vergata;The Observatories of the Carnegie Institution for Science-The-Observatories-of-the-Carnegie-Institution-for-102218800;Pasadena;Ca;Usa;D. Astronomy;M. Observatory;The University of Texas;Austin;Tx;L. I. A. Potsdam;Potsdam;H Germany;A. R. Institute;Liverpool John Moore's University;Liverpool;UK.;Institute for Theoretical Astrophysics;Georg-August-Universitat Gottingen;A. Rechen-Institut;Zentrum fur Astronomie der Universitat Heidelberg;Heidelberg;Universit'e de Nice Sophia-antipolis;Cnrs;Observatoire de la Côte d'Azur;Laboratoire Lagrange;Nice;France;D. Physics;Astronomy;Dartmouth College;Hanover;I. -. Capodimonte;Napoli;Universita degli Studi di NapoliParthenope'';I. S. University;Ames;Ia;Cerro Tololo Inter-American Observatory;NSF's National Optical-Infrared Astronomy Research Laboratory-NSF's-National-Optical-Infrared-Astronomy-Research-1753670520;L. Serena;Chile.;Instituto de Astrof'isica de Canarias-Instituto-de-Astrof'isica-de-Canarias-102997450;La Laguna;Tenerife;Spain.;T. U. O. Tokyo;Tokyo;Japan.;Florida Atlantic University;Boca Raton;Fl;H. Astronomy;Astrophysics;National Research Council;Victoria;Bc;Canada;E. Observatory;G. B. Munchen;Instituto Milenio de Astrof'isica;Santiago;P. U. C. D. Chile;Instituto Milenio de Astrofisica
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文献类型：
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作者：
V. Braga;J. Crestani;M. Fabrizio;G. Bono;G. Preston;C. Sneden;J. Storm;S. Kamann;M. Latour;H. Lala;B. Lemasle;Z. Prudil;G. Altavilla;B. Chaboyer;M. Dall’ora;I. Ferraro;C. Gilligan;G. Fiorentino;G. Iannicola;L. Inno;S. Kwak;M. Marengo;S. Marinoni;P. Marrese;C. Martínez-Vázquez;M. Monelli;J. Mullen;N. Matsunaga;J. Neeley;P. Stetson;E. Valenti;M. T. I. A. D. Roma;M. Catone;Italy.;S. Center;Roma;D. D. Astronomia-D.;Universidade Federal do Rio Grande do Sul-Universidade-Federal-do-Rio-Grande-do-Sul-102904658;P. Alegre;Brazil.;D. Fisica;Universita' di Roma Tor Vergata;The Observatories of the Carnegie Institution for Science-The-Observatories-of-the-Carnegie-Institution-for-102218800;Pasadena;Ca;Usa;D. Astronomy;M. Observatory;The University of Texas;Austin;Tx;L. I. A. Potsdam;Potsdam;H Germany;A. R. Institute;Liverpool John Moore's University;Liverpool;UK.;Institute for Theoretical Astrophysics;Georg-August-Universitat Gottingen;A. Rechen-Institut;Zentrum fur Astronomie der Universitat Heidelberg;Heidelberg;Universit'e de Nice Sophia-antipolis;Cnrs;Observatoire de la Côte d'Azur;Laboratoire Lagrange;Nice;France;D. Physics;Astronomy;Dartmouth College;Hanover;I. -. Capodimonte;Napoli;Universita degli Studi di NapoliParthenope'';I. S. University;Ames;Ia;Cerro Tololo Inter-American Observatory;NSF's National Optical-Infrared Astronomy Research Laboratory-NSF's-National-Optical-Infrared-Astronomy-Research-1753670520;L. Serena;Chile.;Instituto de Astrof'isica de Canarias-Instituto-de-Astrof'isica-de-Canarias-102997450;La Laguna;Tenerife;Spain.;T. U. O. Tokyo;Tokyo;Japan.;Florida Atlantic University;Boca Raton;Fl;H. Astronomy;Astrophysics;National Research Council;Victoria;Bc;Canada;E. Observatory;G. B. Munchen;Instituto Milenio de Astrof'isica;Santiago;P. U. C. D. Chile;Instituto Milenio de Astrofisica
我们收集了最大的RR天琴座（RRL）光谱目录，包括10，000个RRL的20，000个高、中、低分辨率光谱。给出了径向速度曲线（RVC）模板的解析形式。这些是使用36个RRL（31个基波-分成3个周期仓-和5个一次泛音消除器）建立的，具有基于3组金属线（Fe，Mg，Na）和4条巴耳末线（H α，H β，H γ，H δ）的良好采样RVC。我们解决了锚光变曲线和RVC模板的参考历元的长期问题。对于V波段，我们发现锚定到平均震级沿着上升分支的相位的模板的残差比锚定到最大光的相位的模板的残差小1.35%到1.45%。对于RVC，我们使用了两个独立的参考历元的金属线和巴耳末线，我们验证了锚定到平均RV的相位的RVC模板的残差比锚定到最小RV的相位的残差小30%（金属线）到45%（巴耳末线）。我们通过使用单点和三相点方法验证了我们的RVC模板。我们发现，重心速度的基础上，我们的RVC模板是两到三倍，比文献中提供的更准确。我们将当前的RVC模板应用于在VLT用MUSE收集的球状NGC 3201中的RRL的Balmer线RV。我们发现星系团的重心RV为V γ = 496.89 ± 8.37（误差）± 3.43（标准差）km s − 1，这与文献的估计值吻合得很好。
We collected the largest spectroscopic catalog of RR Lyrae (RRLs) including ≈20,000 high-, medium-, and low-resolution spectra for ≈10,000 RRLs. We provide the analytical forms of radial velocity curve (RVC) templates. These were built using 36 RRLs (31 fundamental—split into three period bins—and five first-overtone pulsators) with well-sampled RVCs based on three groups of metallic lines (Fe, Mg, Na) and four Balmer lines (H α , H β , H γ , H δ ). We tackled the long-standing problem of the reference epoch to anchor light-curve and RVC templates. For the V-band, we found that the residuals of the templates anchored to the phase of the mean magnitude along the rising branch are ∼35% to ∼45% smaller than those anchored to the phase of maximum light. For the RVC, we used two independent reference epochs for metallic and Balmer lines and we verified that the residuals of the RVC templates anchored to the phase of mean RV are from 30% (metallic lines) up to 45% (Balmer lines) smaller than those anchored to the phase of minimum RV. We validated our RVC templates by using both the single-point and the three phase point approaches. We found that barycentric velocities based on our RVC templates are two to three times more accurate than those available in the literature. We applied the current RVC templates to Balmer lines RVs of RRLs in the globular NGC 3201 collected with MUSE at VLT. We found the cluster barycentric RV of V γ = 496.89 ± 8.37(error) ± 3.43 (standard deviation) km s−1, which agrees well with literature estimates.