Results 1 to 10 of about 618,783 (120)

Environmental Dependence of Different Colors for the Apparent Magnitude-Limited Main Galaxy Sample of the SDSS DR7

Open Astronomy, 2013
The apparent magnitude-limited Main galaxy sample of the Sloan Digital Sky Survey Data Release 7 is used to investigate the environmental dependence of u–r, u–g, g–r, r–i and i–z colors.
Deng Xin-Fa, Luo Cheng-Hong, Xin Yong, Wu Ping   +3 more
doaj   +1 more source

Luminosity-Environment Relation in the Lowz Sample of the SDSS-III

Open Astronomy, 2016
In this work, we examine the environmental dependence of the u-, g-, r-, i- and z-band luminosities in the LOWZ sample of the Sloan Digital Sky Survey Data Release 10 (SDSS DR10).
Deng Xin-Fa, Qi Xiao-Ping, Wu Ping, Jiang Peng, Qian Xiao-Xia, Song Jun, Ding Ying-Ping   +6 more
doaj   +1 more source

Photometric Investigation of WY Leo: An Eclipsing Binary System with $\delta$ Scuti Component

Journal of Advanced Research in Natural and Applied Sciences
Eclipsing binary stars with $\delta$ components are exceptional systems for gaining a deeper understanding of stellar systems. WY Leo is one such system exhibiting $\delta$-type oscillations. However, it has not been extensively studied in the literature.
Filiz Kahraman Aliçavuş
doaj   +1 more source

Developing a Multi-Element Sensor to Non-Destructively Monitor Several Fundamental Parameters Related to Concrete Durability. [PDF]

Sensors (Basel), 2020
Jin M, Ma Y, Zeng H, Liu J, Jiang L, Yang G, Gu Y.   +6 more
europepmc   +1 more source

The oldest Milky Way stars: New constraints on the age of the Universe and the Hubble constant

Astronomy & Astrophysics
Aims. In this work, we exploit the most robust, old, and cosmology-independent age estimates of individual stars from Gaia DR3 to place a lower bound on the age of the Universe, tU.
Tomasetti Elena, Chiappini Cristina, Nepal Samir, Moresco Michele, Lardo Carmela, Cimatti Andrea, Anders Friedrich, Queiroz Anna B. A., Limberg Guilherme   +8 more
doaj   +1 more source

The multi-planet system TOI-5624: four transiting sub-Neptunes with an outer companion revealed by transit-timing variations★

Astronomy & Astrophysics
Context. Following the 2022 alert of a TESS object of interest transiting TOI-5624 (a G7 V star ∼ 100 pc away), a CHEOPS campaign in 2023 detected four planetary signals at Pb ≈ 3.4, Pc ≈ 7.9, Pd ≈ 13.7, and Pe ≈ 21.5 days.
Bonfanti A., Gandolfi D., Leonardi P., Osborn H. P., Serrano L. M., Hébrard G., Billot N., Bekkelien A., Olofsson G., Broeg C., Nardiello D., Sousa S. G., Wilson T. G., Correia A. C. M., Pezzotti C., Brandeker A., Fossati L., Gillon M., Stalport M., Akinsanmi B., Alibert Y., Alonso R., Asquier J., Bárczy T., Barrado D., Barros S. C. C., Baumjohann W., Benz W., Borsato L., Castro-González A., Collier Cameron A., Csizmadia Sz., Cubillos P. E., Davies M. B., Deleuil M., Delfosse X., Deline A., Demangeon O. D. S., Demory B.-O., Derekas A., Destriez F., Edwards B., Ehrenreich D., Erikson A., Fortier A., Fridlund M., Gazeas K., Güdel M., Günther M. N., Hara N., Heidari N., Heitzmann A., Helling Ch., Isaak K. G., Keller T., Kiss L. L., Kitzmann D., Korth J., Lacedelli G., Lam K. W. F., Laskar J., Lecavelier des Etangs A., Leleu A., Lendl M., Magrin D., Maxted P. F. L., Mecina M., Merín B., Mordasini C., Nascimbeni V., Ottensamer R., Pagano I., Pallé E., Peter G., Piazza D., Piotto G., Pollacco D., Queloz D., Ragazzoni R., Rando N., Rauer H., Ribas I., Santos N. C., Scandariato G., Ségransan D., Simon A. E., Smith A. M. S., Sulis S., Szabó Gy. M., Udry S., Ulmer-Moll S., Van Grootel V., Venturini J., Verrecchia F., Villaver E., Walton N. A., Wolf S., Wolter D., Zingales T.   +98 more
doaj   +1 more source

The GAPS programme at TNG

Astronomy & Astrophysics
The present-day architecture of planetary systems contains information about their formation and migration histories. The origin of hot Jupiters (HJs; P ≲ 10 d, Rp > 8 R⊕) has long been a matter of debate.
Mantovan G., Nascimbeni V., Desidera S., Malavolta L., Lissauer J. J., Leonardi P., Azevedo Silva T., Guerra C., Polychroni D., Borsato L., Baratella M., Biazzo K., Nardiello D., Collins K. A., Damasso M., De Leon J., Everett M. E., Gandolfi D., Giacalone S., Naponiello L., Piotto G., Scandariato G., Stassun K., Yee S. W., Affer L., Amadori F., Bignamini A., Colombo S., D’Arpa M., Dressing C. D., Fukui A., Ghedina A., Higuera J., Ikuta K., Kawauchi, Korth J., Lorenzi V., Mancini L., Mori M., Murgas F., Narita N., Palle E., Parviainen H., Ruggieri A., Savel A., Schwarz R. P., Shporer A., Srdoc G., Stockdale, Watanabe D., Zambelli R., Zingales T.   +51 more
doaj   +1 more source

Fundamental properties of two rapidly rotating stars: Rasalhague and Alkaid

Astronomy & Astrophysics
Context. The fundamental parameters of rapidly rotating stars are key quantities required to understand the impact of rotation on stellar evolution. A few nearby early-type stars offer the possibility to take precise measurements of these parameters ...
Lazzarotto Axel, Hui-Bon-Hoa Alain, Böhm Torsten, Gent Matt, Rieutord Michel   +4 more
doaj   +1 more source

Constraining the Galactic center dark cluster with ELT/MICADO observations

Astronomy & Astrophysics
The Galactic Center hosts the densest known stellar environment in the Milky Way, dominated by the massive black hole Sgr A* and the surrounding nuclear star cluster.
von Fellenberg Sebastiano D., Labaj Matúš, Ressler Sean M.   +2 more
doaj   +1 more source

Compact groups of galaxies (CGs) from the SDSS Data Release 6

Open Physics, 2008
Deng Xin-Fa, He Ji-Zhou, Ma Xin-sheng, Jiang Peng, Tang Xiao-Xun   +4 more
doaj   +1 more source