%0 Generic %1 citeulike:12314937 %A Nowak, G. %A Niedzielski, A. %A Wolszczan, A. %A Adamów, M. %A Maciejewski, G. %D 2013 %K imported %T Planetary-mass companions to the K-giants BD+15 2940 and HD 233604 %U http://arxiv.org/abs/1304.6755 %X We report the discovery of planetary-mass companions to two red giants by the ongoing Penn State - Torun Planet Search (PTPS) conducted with the 9.2-m Hobby-Eberly Telescope. The 1.1 Ms K0-giant, BD+15 2940, has a 1.1 Mj minimum mass companion orbiting the star at a 137.5-day period in a 0.54 AU orbit what makes it the closest - in planet around a giant and possible subject of engulfment as the consequence of stellar evolution. HD 233604, a 1.5 Ms K5-giant, is orbited by a 6.6 Mj minimum mass planet which has a period of 192 days and a semi-major axis of only 0.75 AU making it one of the least distant planets to a giant star. The chemical composition analysis of HD 233604 reveals a relatively high 7Li abundance which may be a sign of its early evolutionary stage or recent engulfment of another planet in the system. We also present independent detections of planetary-mass companions to HD 209458 and HD 88133, and stellar activity-induced RV variations in HD 166435, as part of the discussion of the observing and data analysis methods used in the PTPS project.

@misc{citeulike:12314937, abstract = {{We report the discovery of planetary-mass companions to two red giants by the ongoing Penn State - Torun Planet Search (PTPS) conducted with the 9.2-m Hobby-Eberly Telescope. The 1.1 Ms K0-giant, BD+15 2940, has a 1.1 Mj minimum mass companion orbiting the star at a 137.5-day period in a 0.54 AU orbit what makes it the closest - in planet around a giant and possible subject of engulfment as the consequence of stellar evolution. HD 233604, a 1.5 Ms K5-giant, is orbited by a 6.6 Mj minimum mass planet which has a period of 192 days and a semi-major axis of only 0.75 AU making it one of the least distant planets to a giant star. The chemical composition analysis of HD 233604 reveals a relatively high 7Li abundance which may be a sign of its early evolutionary stage or recent engulfment of another planet in the system. We also present independent detections of planetary-mass companions to HD 209458 and HD 88133, and stellar activity-induced RV variations in HD 166435, as part of the discussion of the observing and data analysis methods used in the PTPS project.}}, added-at = {2019-03-25T08:20:55.000+0100}, archiveprefix = {arXiv}, author = {Nowak, G. and Niedzielski, A. and Wolszczan, A. and Adam\'{o}w, M. and Maciejewski, G.}, biburl = {https://www.bibsonomy.org/bibtex/2bca49e7a59f65cf434532b9ae8243ad4/ericblackman}, citeulike-article-id = {12314937}, citeulike-linkout-0 = {http://arxiv.org/abs/1304.6755}, citeulike-linkout-1 = {http://arxiv.org/pdf/1304.6755}, day = 24, eprint = {1304.6755}, interhash = {2e16310f5bcb83f1d2eaa1ce8d6cd1a2}, intrahash = {bca49e7a59f65cf434532b9ae8243ad4}, keywords = {imported}, month = apr, posted-at = {2013-11-07 21:37:32}, priority = {2}, timestamp = {2019-03-25T08:20:55.000+0100}, title = {{Planetary-mass companions to the K-giants BD+15 2940 and HD 233604}}, url = {http://arxiv.org/abs/1304.6755}, year = 2013 }