Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/30990
Title: Predicted Masses of Galactic Cepheids in the Gaia Data Release 2
Authors: MARCONI, Marcella 
DE SOMMA, GIULIA 
RIPEPI, Vincenzo 
MOLINARO, Roberto 
MUSELLA, ILARIA 
LECCIA, Silvio 
Moretti, Maria Ida 
Issue Date: 2020
Journal: THE ASTROPHYSICAL JOURNAL LETTERS 
Number: 898
Issue: 1
First Page: L7
Abstract: On the basis of recently computed nonlinear convective pulsation models of Galactic Cepheids, spanning wide ranges of input stellar parameters, we derive theoretical mass-dependent Period-Wesenheit relations in the Gaia bands, namely, G, G BP, and G BR, that are found to be almost independent of the assumed efficiency of superadiabatic convection. The application to a selected subsample of the Gaia Data Release 2 Galactic Cepheids database allows us to derive mass-dependent estimates of their individual distances. By imposing their match with the astrometric values inferred from Gaia, we are able to evaluate the individual mass of each pulsator. The inferred mass distribution is peaked around 5.6M o˙ and 5.4M o˙ for the F and FO pulsators, respectively. If the estimated Gaia parallax offset «Δϖ» mas is applied to Gaia parallaxes before imposing their coincidence with the theoretical ones, the inferred mass distribution is found to shift toward lower masses, namely, ∼5.2M o˙ and 5.1M o˙ for the F and FO pulsators, respectively. The comparison with independent evaluations of the stellar masses, for a subset of binary Cepheids in our sample, seems to support the predictive capability of the current theoretical scenario. By forcing the coincidence of our mass determinations with these literature values we derive an independent estimate of the mean offset to be applied to Gaia DR2 parallaxes, «Δϖ» = 0.053 ± 0.029 mas, slightly higher but in agreement within the errors with the Riess et al. value.
URI: http://hdl.handle.net/20.500.12386/30990
URL: https://iopscience.iop.org/article/10.3847/2041-8213/aba12b
ISSN: 2041-8205
DOI: 10.3847/2041-8213/aba12b
Bibcode ADS: 2020ApJ...898L...7M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat
2006.16610.pdf618.67 kBAdobe PDFView/Open
Marconi_2020_ApJL_898_L7.pdf[Administrators only]806.77 kBAdobe PDF
Show full item record

Page view(s)

28
checked on Mar 26, 2023

Download(s)

8
checked on Mar 26, 2023

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE