ARES III: Unveiling the Two Faces of KELT-7 b with HST WFC3. (arXiv:2006.14199v3 [astro-ph.EP] UPDATED)

ARES III: Unveiling the Two Faces of KELT-7 b with HST WFC3. (arXiv:2006.14199v3 [astro-ph.EP] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Pluriel_W/0/1/0/all/0/1">William Pluriel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Whiteford_N/0/1/0/all/0/1">Niall Whiteford</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Edwards_B/0/1/0/all/0/1">Billy Edwards</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Changeat_Q/0/1/0/all/0/1">Quentin Changeat</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yip_K/0/1/0/all/0/1">Kai Hou Yip</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Baeyens_R/0/1/0/all/0/1">Robin Baeyens</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Al_Refaie_A/0/1/0/all/0/1">Ahmed Al-Refaie</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bieger_M/0/1/0/all/0/1">Michelle Fabienne Bieger</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Blain_D/0/1/0/all/0/1">Dorian Blain</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gressier_A/0/1/0/all/0/1">Amelie Gressier</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Guilluy_G/0/1/0/all/0/1">Gloria Guilluy</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jaziri_A/0/1/0/all/0/1">Adam Yassin Jaziri</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kiefer_F/0/1/0/all/0/1">Flavien Kiefer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Modirrousta_Galian_D/0/1/0/all/0/1">Darius Modirrousta-Galian</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Morvan_M/0/1/0/all/0/1">Mario Morvan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mugnai_L/0/1/0/all/0/1">Lorenzo V. Mugnai</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Poveda_M/0/1/0/all/0/1">Mathilde Poveda</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Skaf_N/0/1/0/all/0/1">Nour Skaf</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zingales_T/0/1/0/all/0/1">Tiziano Zingales</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Wright_S/0/1/0/all/0/1">Sam Wright</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Charnay_B/0/1/0/all/0/1">Benjamin Charnay</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Drossart_P/0/1/0/all/0/1">Pierre Drossart</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Leconte_J/0/1/0/all/0/1">Jeremy Leconte</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tsiaras_A/0/1/0/all/0/1">Angelos Tsiaras</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Venot_O/0/1/0/all/0/1">Olivia Venot</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Waldmann_I/0/1/0/all/0/1">Ingo Waldmann</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Beaulieu_J/0/1/0/all/0/1">Jean-Philippe Beaulieu</a>

We present the analysis of the hot-Jupiter KELT-7b using transmission and
emission spectroscopy from the Hubble Space Telescope (HST), both taken with
the Wide Field Camera 3 (WFC3). Our study uncovers a rich transmission spectrum
which is consistent with a cloud-free atmosphere and suggests the presence of
H2O and H-. In contrast, the extracted emission spectrum does not contain
strong absorption features and, although it is not consistent with a simple
blackbody, it can be explained by a varying temperature-pressure profile,
collision induced absorption (CIA) and H-. KELT-7 b had also been studied with
other space-based instruments and we explore the effects of introducing these
additional datasets. Further observations with Hubble, or the next generation
of space-based telescopes, are needed to allow for the optical opacity source
in transmission to be confirmed and for molecular features to be disentangled
in emission.

http://arxiv.org/icons/sfx.gif