Welcome to OA@INAF

OA@INAF is the institutional repository of the Italian National Institute for Astrophysics born in 2019 with the purpose of collecting, archiving and disseminating the scientific outputs of public funded research in accordance with the European requirements of Open Access.

To learn more go to the website of info on open access in INAF

Searching done using the boxes in the top menu and in the center of the home page takes place throughout the entire contents of the repository, including the text of uploaded articles. For more targeted searches use the "Research outputs" section and set the appropriate filters. Read more in the FAQ Searching the repository in the info site on Open Access in INAF.
Recent Submissions
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    How does clustering depend on environment?
    (2004) ;
    Sheth, Ravi K.
    According to the current paradigm, galaxies form and reside in extended cold dark matter (CDM) halos and in turn are key tracers of cosmological structure. Understanding how different types of galaxies occupy halos of different masses is one of the major challenges facing extragalactic astrophysics. The observed galaxy properties depend on the environment surrounding the galaxy. Within the framework of most galaxy formation models the environmental dependence of the galaxy population is mainly due to the change of the halo mass function with large-scale environment. Such models make precise predictions for how galaxy clustering should depend on environment. We will illustrate this by presenting analytical models of dark matter and galaxy clustering along with results obtained from numerical simulations. With these results we can hope to obtain a better understanding of the link between galaxies and dark matter and thereby constrain galaxy formation models.
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    On the inclusion of environmental effects in the halo model of galaxy clustering
    (2004)
    Sheth, Ravi K.
    ;
    ;
    Skibba, Ramin
    Standard models of galaxy formation make specific predictions for how galaxy properties depend on environment. These predictions follow from the assumption that galaxy properties are entirely determined by the formation histories of the halos which host them, and that the distribution of dark halo masses is skewed towards large masses in dense regions. We describe two tests of this assumption which can be made with currently available data.
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    How does Clustering depend on Environment?
    (2004) ;
    Sheth, R. K.
    According to the current paradigm, galaxies form and reside in extended cold dark matter(CDM) halos and in turn are key tracers of cosmological structure. Understanding how different types of galaxies occupy halos of different masses is one of the major challenges facing extragalactic astrophysics.

    The observed galaxy properties depend on the environment surrounding the galaxy. Within the framework of most galaxy formation models the environmental dependence of the galaxy population is mainly due to the change of the halo mass function with large-scale environment. Such models make precise predictions for how galaxy clustering should depend on environment.

    We will illustrate this by presenting analytical models of dark matter and galaxy clustering along with results obtained from numerical simulations. With these results we can hope to obtain a better understanding of the link between galaxies and dark matter and thereby constrain galaxy formation models.

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    The environmental dependence of clustering in hierarchical models
    (2005) ;
    Sheth, Ravi K.
    In hierarchical models, density fluctuations on different scales are correlated. This induces correlations between dark halo masses, their formation histories, and their larger-scale environments. In turn, this produces a correlation between galaxy properties and environment. This correlation is entirely statistical in nature. We show how the observed clustering of galaxies can be used to quantify the importance of this statistical correlation relative to other physical effects which may also give rise to correlations between the properties of galaxies and their surroundings. We also develop a halo model description of this environmental dependence of clustering.
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    The Environmental Dependence of Clustering in Hierarchical Models
    I will show how the observed clustering of galaxies can be used to quantify the statistical correlation between the properties of galaxies and their surrounding larger-scale environments relative to those of other physical effects. This will be illustrated with results from mock catalogs of galaxies in real and redshift-space alongwith a comparison to actual galaxy samples obtained from the Sloan Digital Sky Survey. Comparison of the environmental dependence of clustering in the mock catalogs and in real data allows one to test the assumption that environmental effects are dominated by the statistical correlation between halo mass and environment. Finally, I will show analytically how to incorporate this assumption into the halo model description of large scale structure.
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    The environmental dependence of dark matter and galaxy clustering
    We have addressed important astrophysical issues of the large scale structure of the universe with the help of analytical and numerical tools. In particular, we have concentrated on obtaining a better understanding of the environmental dependence of clustering of dark matter and galaxies. We will discuss the development of the analytical framework, the generation of mock catalogs of data, and present results from numerical studies of the comparison of the theory with the simulated data samples and subsequently with actual observational data.

    The N-body simulations from the Virgo consortium and SDSS data were used to study the clustering properties of dense and less dense subsamples with the help of the correlation function. The dense sample shows a correlation function that is about a factor of ten times or more higher than the less dense sample at large scales. This discernible difference holds true for mock galaxies, dark matter, and data from the Sloan Digital Sky Survey. By utilizing the halo model and adapting the formalism to different environments, we present the correspondence between theoretical models and simulated samples and real data.

    The very good agreement between the model and results from simulations and data provides strong support for the hierarchical clustering models. This suggests that unless care is taken to study galaxies at fixed halo mass, observed correlations between gastrophysical effects and environment are dominated by the fact that these effects also correlate with the halo mass, and halo mass correlates with environment.

News
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    Nuova news senza tag html
    Se inserisci una nuova news senza tag html la vedrai così. "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
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    Nuova news con tag html
    Per inserire una nuova news, formattata con tag html, ho provato a copiare e incollare il testo di una news formattata Go online

    Dal 5 dicembre 2019 OA@INAF è aperto all'immissione dei RAPPORTI TECNICI. Prima di fare una submission o una review si prega di seguire attentamente le istruzioni riportate nel Manuale d'uso per l'inserimento dei rapporti tecnici in OA@INAF [versione aggiornata al 24.5.2021].
    Dal 24 febbraio 2020 i ricercatori possono inserire i prodotti della ricerca. Prima di procedere, si raccomanda un'attenta lettura delle Istruzioni per l'inserimento dei prodotti della ricerca nel repository OA@INAF [versione aggiornata al 15.5.2020].

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    Go online
    Dal 5 dicembre 2019 OA@INAF è aperto all'immissione dei RAPPORTI TECNICI. Prima di fare una submission o una review si prega di seguire attentamente le istruzioni riportate nel Manuale d'uso per l'inserimento dei rapporti tecnici in OA@INAF [versione aggiornata al 21.01.2022].
    Dal 24 febbraio 2020 i ricercatori possono inserire i prodotti della ricerca. Prima di procedere, si raccomanda un'attenta lettura delle Istruzioni per l'inserimento dei prodotti della ricerca nel repository OA@INAF [versione aggiornata al 15.5.2020].
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    Bug di ADS e mancato recupero da ADS delle pubblicazioni pregresse (fino al 2014)
    A causa di un bug di ADS che espone una lista di autori e una di ORCID non coerenti fra loro, il recupero delle pubblicazioni e il loro legame con gli autori non è possibile. Pertanto, fino a risoluzione del bug, il pregresso (fino al 2014) non sarà più importato come inizialmente previsto.
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    Inserimento delle pubblicazioni dal 2015 al 2019
    Le pubblicazioni indicizzate in ADS dal 2015 al 2019 verranno recuperate a blocchi di anni. I ricercatori troveranno nel workspace le submissions da completare con i metadati mancanti e il full text. Perché questo sia possibile, è necessario aver fatto il claim delle pubblicazioni in ADS con il proprio ORCID. Chi non ha fatto il claim non troverà nulla.. Per gli anni dal 2016 in poi le submissions da completare andranno a finire solo nel workspace del primo autore INAF, a cui spetterà il compito di completare l'inserimento nel repository.
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    Inserimento delle pubblicazioni non indicizzate da ADS o non recuperate in automatico
    Ciò che non è indicizzato in ADS o non viene recuperato a causa del bug potrà essere inserito nel modo semi-automatico, con ricerca per ID (DOI, ORCID, ADSBibCode).
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