updating science pages

docs/_data/navigation.yml

@@ -47,8 +47,8 @@ docs:
         url: /science/transits/
       - title: "Free-Floating Planets"
         url: /science/ffps/
-#      - title: "Compact Objects"
-#        url: /science/galaxies/
+      - title: "Compact Objects"
+        url: /science/compact_obj/
 
   - title: Data
     url: /data/

docs/_pages/sci_compact.md

@@ -0,0 +1,45 @@
+---
+permalink: /science/compact_obj/
+title: "Compact Objects"
+sidebar:
+  nav: "docs"
+---
+
+<figure>
+    <a href="{{ site.url }}{{ site.baseurl }}/assets/images/isolated_BH.jpeg">
+        <img src="{{ site.url }}{{ site.baseurl }}/assets/images/isolated_BH.jpeg">
+    </a>
+    <figcaption>Caption: Artist impression of an isolated black hole drifting through the Milky Way. The black hole 
+        distorts the space around it, which warps the light from background objects.
+        <br>
+    Credit: FECYT, IAC.</figcaption>
+</figure>
+
+Since the majority of black hole systems in the Milky Way are expected to be isolated ([Belczynski et al. 2004](https://iopscience.iop.org/article/10.1086/422191){:target="_blank"}, 
+[Wiktorowicz et al. 2019](https://iopscience.iop.org/article/10.3847/1538-4357/ab45e6){:target="_blank"}), the
+only way to find and weigh these objects is through gravitational microlensing. In particular, massive lenses may cause
+a measurable astrometric deflection of the background source star (called astrometric microlensing).
+
+&nbsp;  
+Recently, the first ever isolated black hole was confirmed through a measurement of astrometric microlensing with high-resolution
+data from the Hubble Space Telescope ([Lam et al. 2022](https://iopscience.iop.org/article/10.3847/2041-8213/ac7442/meta){:target="_blank"},
+[Lam & Lu 2023](https://iopscience.iop.org/article/10.3847/1538-4357/aced4a/meta){:target="_blank"}
+[Sahu et al. 2022](https://iopscience.iop.org/article/10.3847/1538-4357/ac739e/meta){:target="_blank"}). The total astrometric
+deflection measured was approximately 1 milliarcsecond. With the exquisite astrometric precision that Roman will deliver, 
+upwards of ~100 isolated compact objects including black holes are expected to be detected and characterized with GBTDS data.
+
+<figure>
+    <a href="{{ site.url }}{{ site.baseurl }}/assets/images/roman_bh_simulated.png">
+        <img src="{{ site.url }}{{ site.baseurl }}/assets/images/roman_bh_simulated.png">
+    </a>
+    <figcaption>Caption: A simulated black hole microlensing event observed with the Roman F146W filter. The first three
+    seasons of the GBTDS capture the photometric microlensing signal (outer panel), while the astrometric signal changes across all six 
+    seasons (inset panel) and is well characterized by a 8.5 solar-mass black hole lensing a background bulge star. 
+    The 72-second exposures are taken every ~15 minutes and are combined in 1-day bins (e.g. ~90 frames stacked each day).
+    <br>
+    Credit: S. Terry (UMD).</figcaption>
+</figure>
+
+In order to optimize the number of isolated compact objects that can be characterized by the GBTDS, the survey is expected
+to conduct lower cadence 'gap-filling' observations during the off-seasons that will not have high-cadence monitoring (e.g. between
+seasons three and four, see above figure).

docs/_pages/sci_ffps.md

@@ -5,6 +5,16 @@ sidebar:
   nav: "docs"
 ---
 
+<figure>
+    <a href="{{ site.url }}{{ site.baseurl }}/assets/images/ffp.jpg">
+        <img src="{{ site.url }}{{ site.baseurl }}/assets/images/ffp.jpg">
+    </a>
+    <figcaption>Caption: Artist illustration of a Jupiter-like planet alone in the dark of space, 
+        floating freely without a parent star.
+        <br>
+    Credit: NASA/JPL-Caltech/R Hurt.</figcaption>
+</figure>
+
 A unique aspect of the microlensing phenomenon is that it does not require the lens object to emit any light of its own. This
 means microlensing is sensitive to dark objects like black holes, neutron stars, and free-floating planets. Roman is expected to 
 discover between 200 and 1,000 free-floating planets (FFPs). This estimate depends on the true mass function of FFPs

docs/_pages/sci_ulensing.md

@@ -5,7 +5,17 @@ sidebar:
   nav: "docs"
 ---
 
-
+<figure class="full">
+    <a href="{{ site.url }}{{ site.baseurl }}/assets/animations/planetary_microlensing.gif">
+        <img src="{{ site.url }}{{ site.baseurl }}/assets/animations/planetary_microlensing.gif">
+    </a>
+    <figcaption>Caption: Illustration showing the concept of gravitational microlensing. If the
+    foreground (lens) star has a planet orbiting it, the planet can also act as a lens and cause
+    further deviations to the light curve. 
+        <br>
+    Credit: NASA GSFC/CI Lab.</figcaption>
+</figure>
+
 The RGES is expected to discover over 1,400 bound microlensing planets with masses greater than 0.1M_earth (Penny et al. 2019).
 Of these, Roman should detect over 200 with mass approximately equal to 3M_earth, and should have sensitivity to planets with
 the mass of Ganymede (~0.02M_earth). A comprehensive microlensing simulation study was performed by [Penny et al. 2019](https://iopscience.iop.org/article/10.3847/1538-4365/aafb69/meta){:target="_blank"}